POLISH JOURNAL OF CHEMISTRY
Volume 73 Number 2 February 1999
Pages 245-416


CONTENTS

Page

INORGANIC CHEMISTRY
245 Synthesis and Characterization of Novel Copper(II) Complexes of Dehydroacetic Acid
Thiosemicarbazone

— El-Tabl A.S., Kashar T.I., El-Bahnasawy R.M. and El-Monsef Ibrahim A.
255 The Phase Equilibria on AgGaS2/AgInS2/-HgS Section in the Quasi-Ternary Ag2S-HgS-Ga2S3/In2S3/Systems
— Olekseyuk I.D., Galka V.O. and Parasyuk O.V.
263 ESR Studies on Copper(II) Complexes of 1,3-Diaminopropane and 1,2-Diaminopropane
— Ayad M.I. and El-Tabl A.S.
271 Nucleophilic Additions in Cu(II), Ni(II), Co(II) Pseudohalide-4-Halogenopyrazole Systems
— Hvastijova M., Kohout J., Mroziński J. and Jaeger L.
279 Phase Equilibria in the System MgO-Na2O-P2O5: The Binary System Mg3(PO4)2-Na3PO4
— Podhajska-KaŸmierczak T. and Znamierowska T.
287 Interaction in the AgInSe2-Ag8GeSe6(Ag8SnSe6) Systems
— Olekseyuk I.D. and Krykhovets O.V.
293 Thermal Decomposition and IR-Spectra of Mg(II) Complexes with -Picoline
— Mojumdar S.C., Melnik M. and Jóna E.
ORGANIC CHEMISTRY
299 Topological "In-Out" Isomerism in Perhydrogenated Fullerenes Revisited. C60H58R1R2 with Two R Groups "In" (R1, R2 = H, Me)
— Dodziuk H., Lukin O. and Nowiński K.S.
307 Synthesis of 1-Aminoalkanephosphonous Acids Bearing Furan Moiety and Its Stereochemical Aspect
— Grabowski G., Lewkowski J.A., Nazarski R.B., Skowroński R. and
Karolak-Wojciechowska J.
313 The Study on Helix-Inducing Propensity of -Hydroxymethylserine Based on the Host-Guest Approach
— Lisowski M., Stasiak M. and Leplawy M.T.
321 Synthesis and Pharmacological Properties of New Derivatives of 2-Amino-5-(2-amino-3-pyridyl)-1,3,4-oxadiazole
— Liszkiewicz H., Głowiak T., Kowalska M.W., Rutkowska M., Szeląg A., Barczyńska J., and
Kędzierska-GoŸdzik L., Błaszczyk F. and Dziewiszek W.
333 Triterpenoids. Part XV. Quinoline Derivatives of Oleanane
— Zaprutko L.
PHYSICAL CHEMISTRY
339 Analysis of Simple and Single Thermal Desorption Spectra: Application to Hydrogen (Deuterium) Desorption from a Thin Gold Film
— Zommer L. and Stobiński L.
347 Non-Linear Effects in Spherical Particle Motion in Oscillatory Flowing Gas
— Dolata M. and Michalski J.A.
359 Inhibition of Jack Bean Urease by a Mixture of Boric Acid and Phosphate Buffer pH 6.96
— Krajewska B., Zaborska W., Leszko M. and Brzózka Z.
CRYSTAL AND MOLECULAR STRUCTURE
367 Molecular Structure of Two 1-O-Acylglycosyl Esters of Diclofenac: 1-O-{2-[(2,6-Dichlorophenyl)amino]phenylacetyl}-2,3,4,6-tetra-O-acetyl-b-D-glucopyranose and 1-O-{2-[(2,6-Dichlorophenyl)amino]phenylacetyl}-2,3,4-tri-O-acetyl-b-D-xylopyranose
— Kołodziejczyk E., Suwińska K., Kozioł A.E., Enright G. and Borowiecka J.
377 Structure of N2-[4-(2-Chlorophenyl)-1,3-thiazol-2-yl]-(1R,1S)-6,7-dimethoxy-1-(3-pyridylmethyl)-1,2,3,4-tetrahydro-2-isoquinolinecarboxo Amide
— Maurin J.K., Czarnocki Z. and Paluchowska B.
COMMUNICATIONS
385 Synthesis and Characterization of Uranium(IV) Complexes with Furoic and Isonicotinic Acid Hydrazones
— Gudasi K.B. and Goudar T.R.
391 Crystal Structure of the Binuclear Copper(II) Complex [Cu2(tacn)2(µ-ox)](ClO4)2 (tacn = 1,4,7-triazacyclononane)
— Zhang L., Yan H.L., Yan S.P., Jiang Z.H., Liao D.Z. and Wang G.L.
395 Simplified Analogue of Cucurbita maxima Trypsin Inhibitor III (CMTI-III) Substituted with L-Norleucine in Position 8
— Witczuk B., Frąszczak P., Jaśkiewicz A., Lis K., Rolka K. and Kupryszewski G
399 Catalytic Hydrogen Transfer Over Magnesia. X. Reduction of 1-Phenyl-1-alkanones by
2-Propanol

— Gliński M. and Wróblewska R.
DISCUSSION
403 Some Problems Concerning Unusual Hydrogen Bonds with Hydride Hydrogen as Proton Acceptor
— Epstein L.M., Belkova N.V., Bakhmutova E.V., Saitkulova L.N. and Shubina E.S.
BOOK REVIEWS
411 Jednopierwiastkowe Struktury Chemiczne (Homonuclear Chemical Structures) by Z. Gontarz and A. Górski
reviewed by S. Siekierski
413 Stephen J. Lippard, Jeremy M. Berg "Principles of Bioinorganic Chemistry" (in Polish) Polish edition: "Podstawy Chemii Bionieorganicznej", Wydawnictwo Naukowe PWN SA, Warszawa, 1998, 364 stron
reviewed by H. Kozłowski
CALL FOR PAPERS
414


ABSTRACTS


245-254

Synthesis and Characterization of Novel Copper(II) Complexes of Dehydroacetic Acid Thiosemicarbazone

by A.S. El-Tabl, T.I. Kashar, R.M. El-Bahnasawy and A. El-Monsef Ibrahim
Department of Chemistry, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt

(Received March 10th, 1998; revised manuscript July 8th, 1998)

Dehydroacetic acid thiosemicarbazone and its copper(II) complexes have been synthesized and characterized by elemental analyses, IR, VIS-UV, magnetic susceptibility, conductivity, DTA and ESR spectra. Molar conductance indicates that the complexes are non-electrolytes except for [Cu(H2L)]SO4.2H2O. The ESR spectra of the complexes show axial type symmetry with g|| >> g- >> 2.00, indicating dx2-y2 ground state with significant covalent bond character.

255-261

The Phase Equilibria on AgGaS2/AgInS2/-HgS Section in the Quasi-Ternary Ag2S-HgS-Ga2S3/In2S3/ Systems

by I.D. Olekseyuk, V.O. Galka and O.V. Parasyuk
Department of Inorganic and Physical Chemistry, Volyn State University,
Voli av. 13, Lutsk 263009, Ukraine; e-mail:oleg@lab.univer.lutsk.ua

(Received July 9th, 1998; revised manuscript September 7th, 1998)

The phase diagrams of AgGaS2/AgInS2/-HgS sections in the quasi-ternary Ag2S-HgS-Ga2S3/In2S3/systems have been constructed using differential thermal, X-ray phase and microstructural analyses. AgGaS2-HgS section is quasi-binary and belongs to the eutectic type. The coordinates of the eutectic point are 76 mol% HgS and 1018 K. AgInS2-HgS is not quasi-binary above the solidus. In the AgGaS2-HgS system the limited solid solutions within the composition range 0-2 mol% HgS and 82-98 mol% HgS at 670 K were discovered. The compounds AgInS2 and HgS form limited solid solutions within the composition range 0-2 mol% HgS and 71-95 mol% HgS at 670 K. The solid solutions, in the part HgS-rich, are created on the basis of the low temperature cubic structure (-HgS) on both sections.

263-269

ESR Studies on Copper(II) Complexes
of 1,3-Diaminopropane and 1,2-Diaminopropane

by M.I. Ayad and A.S. El-Tabl
Department of Chemistry, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt

(Received March 30th, 1998; revised manuscript September 11th, 1998)

The synthesis and characterization of (NH2RNH2)3CuCl2.H2O complexes, where R = (-CH2-)3 or (-CH(CH3)-CH2-) are reported. The complexes are octahedral. The ESR spectra of polycrystalline samples showed broad lines, which indicate spin-exchange interactions between copper(II) ions. In solution at 77 K, the spectra show axial type symmetry with dx2-y2 ground state of a tetragonal distortion around copper(II) ion. The bonding parameters 22 and ß12 indicate a covalent character of in-plane and bondings, while ß2 indicates ionic out-of-plane bondings. d-Orbital populations of the complexes indicate, that the unpaired electron site is mainly in dx2-y2 orbital.

271-278

Nucleophilic Additions in Cu(II), Ni(II), Co(II)
Pseudohalide-4-Halogenopyrazole Systems

by M. Hvastijova1, J. Kohout1, J. Mroziński2 and L. Jaeger3
1Department of Inorganic Chemistry, Slovak University of Technology, 812 37 Bratislava, Slovakia
2Faculty of Chemistry, University of Wrocław, 50 383 Wrocław, Poland
3Faculty of Chemistry, Institut fuer Anorganische Chemie, Martin-Luther-Universitaet Halle-Wittenberg, D-06099 Halle/ Saale, Germany

(Received July 30th, 1998; revised manuscript October 1st, 1998)

From M(II)-Y--4-X-pz systems, where M = Cu, Ni, Co; Y = NCO, C(CN)3, N(CN)2; X = Cl, Br, I (pz = pyrazole), new compounds of the type [MY2(4-X-pz)2] and [M(4-X-pz.Y)2] have been prepared. Compounds [M(4-X-pz.Y)2] arise by nucleophilic addition of imine nitrogen from 4-X-pz to cyano carbon of the pseudohalide under formation of five-membered metallocycle. The influence of X substituent on the course of this reaction with various M(II) and Y was investigated. An uncomplete course of nucleophilic addition is revealed by formation of mixed products, consisting of [MY2(4-X-pz)2] and [M(4-X-pz.Y)2]. All compounds were studied by infrared and electronic spectroscopy and probable structures were assigned to the relevant species.

279-286

Phase Equilibria in the System MgO-Na2O-P2O5:
The Binary System Mg3(PO4)2-Na3PO4

by T. Podhajska-KaŸmierczak and T. Znamierowska
Department of Inorganic Chemistry, Faculty of Engineering and Economics, Academy of Economics, Komandorska 118/120, 53-345 Wrocław, Poland

(Received July 6th, 1998; revised manuscript October 19th, 1998)

In the ternary system MgO-Na2O-P2O5 the binary system Mg3(PO4)2-Na3PO4 was investigated by thermal analysis, X-ray and microscopy, and its phase diagram was proposed. Three intermediate compounds occur in this system with the molar ratio Mg3(PO4)2:Na3PO4 4:1, 1:1 and 1:4, and corresponding formulas Mg4Na(PO4)3, MgNaPO4 and MgNa4(PO4)2. The phosphate Mg4Na(PO4)3 melts incongruently at 1155°C, the MgNa4(PO4)2 melts congruently at 1655°C, whereas the phosphate MgNaPO4 occurs only in the solid phase, which undergoes decomposition at 950-960°C. The polymorphism of these phosphates was investigated and temperatures of polymorphic transitions were determined.

287-291

Interaction in the
AgInSe2-Ag8GeSe6(Ag8SnSe6) Systems

by I.D. Olekseyuk and O.V. Krykhovets
Department of Inorganic and Physical Chemistry, Volyn State University,
Voli av. 13, Lutsk 263009, Ukraine

(Received September 8th, 1998; revised manuscript October 23rd, 1998)

Phase diagrams in the AgInSe2-Ag8GeSe6 and AgInSe2-Ag8SnSe6 systems have been constructed using differential thermal, X-ray phase and microstructural analyses. Both sections are quasibinary and of eutectic type and contain homogeneity ranges on the base of initial compounds.

293-297

Thermal Decomposition and IR-Spectra
of Mg(II) Complexes with -Picoline

by S.C. Mojumdar1, M. Melnik1 and E. Jóna2
1Department of Inorganic Chemistry, Slovak Technical University, Radlinskeho 9, 812 37 Bratislava, Slovakia, E-mail: mojumdar@cvt.stuba.sk
2Department of Chemistry, Faculty of Industrial Technologies, 02032 P<163>chov, Slovakia

(Received July 27th, 1998; revised manuscript October 26th, 1998)

The thermal decomposition of the complexes Mg(Clac)2(pic)2.3H2O (I), Mg(Cl2ac)2(pic).4H2O (II) and Mg(Cl3ac)2(pic)2.3H2O (III), where Clac = ClCH2COO-, Cl2ac = Cl2CHCOO-, Cl3ac = Cl3CCOO- and pic = -picoline had been investigated in air by TG and DTA. The possible scheme of destruction of the complexes is suggested. The final product was MgO for the complexes I-III. The thermal stability of the complexes can be ordered in the sequence: I = III << II. IR data suggest a unidentate coordination of carboxylates to Mg(II) in complexes I-III and -picoline coordination with Mg(II) through the nitrogen atom of its heterocyclic ring.

299-306

Topological "In-Out" Isomerism in Perhydrogenated Fullerenes Revisited. C60H58R1R2 with Two R Groups "In" (R1, R2 = H, Me)

by H. Dodziuk1, O. Lukin1 and K.S. Nowiński2
1Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44, 01-224 Warsaw, Poland
2Institute of Mathematics and Applied Mechanics, Warsaw University, Warsaw, Poland
E-mail:dodziuk@ichf.edu.pl

(Received August 18th, 1998; revised manuscript September 10th, 1998)

Molecular mechanics calculations (using MM+, MMX and AMBER force fields) of all constitutional and topological isomers of C60H58R1R2 with R1, R2 = H, Me revealed that "in,in" isomers are always the most stable, while the corresponding "out,out" isomers have the biggest energy. Moreover, a substitution of an "in" hydrogen atom by a methyl group in the confined volume of the C60 cage does not change, or even lowers, the steric energy. The dependence of steric energy on the distance between the "in" hydrogen atoms (or between the carbon atoms of "in" methyl groups) reveals highly irregular behaviour, for close neighbours, reflecting differences in the energies associated with considerable distortions of the fullerane skeleton.

307-311

Synthesis of 1-Aminoalkanephosphonous Acids
Bearing Furan Moiety and Its Stereochemical Aspect [1]

by G. Grabowski1, J.A. Lewkowski1, R.B. Nazarski1,
R. Skowroński1 and J. Karolak-Wojciechowska2
1Department of Organic Chemistry, University of ŁódŸ, Narutowicza 68, 90-136 ŁódŸ, Poland
2Institute of General Chemistry, Technical University of ŁódŸ, Żwirki 36, 90-924 ŁódŸ, Poland

(Received September 8th, 1998; revised manuscript September 28th, 1998)

A series of variously N-substituted (2-furyl)aminomethanephosphonous acids was synthesized in fair yields. The synthesis of optically pure (S)-(2-furyl)-(R)-N--methylbenzylaminomethanephosphonous acid is also presented.

313-319

The Study on Helix-Inducing Propensity
of -Hydroxymethylserine Based
on the Host-Guest Approach

by M. Lisowski1, M. Stasiak2 and M.T. Leplawy2
1Faculty of Chemistry, University of Wrocław, F. Joliot-Curie Str. 14, 50-383 Wrocław, Poland
2Institute of Organic Chemistry, Technical University of ŁódŸ, Żwirki Str. 36, 90-924 ŁódŸ, Poland (Received August 10th, 1998; revised manuscript October 1st, 1998)

The solid-phase synthesis of -hydroxymethylserine peptides is affected by accummulation of deleted sequences and NO-acyl migrations, occurring under acidic conditions of cleavage from Wang resin. The conformational behaviour of peptides, containing alanine host-residues separated by a single or consecutive -hydroxymethylserine (HmS) guest-residues, has been studied by CD spectroscopy in polar protic solvents. The presence of sequential motif (Ala-HmS)n, n = 2, 4, shifts the conformational equilibria towards ordered structures. The CD spectrum of the nonapeptide Ac-Ala-(HmS-Ala)4-OH in trifluoroethanol is indicative of a right-handed helix. Peptides with consecutive HmSn residues, n = 2, 3, are apparently less ordered than those containing alternating sequences Ala-HmS. Random coil conformation is adopted by the nonapeptide Ac-Ala3-(HmS)3-Ala3-OH containing three neighbouring HmS residues.

321-332

Synthesis and Pharmacological Properties
of New Derivatives of 2-Amino-5-(2-amino-3-pyridyl)-
-1,3,4-oxadiazole

by H. Liszkiewicz1, T. Głowiak2, M.W. Kowalska2, M. Rutkowska3, A. Szeląg3,
J. Barczyńska3, L. Kędzierska-GoŸdzik3, F. Błaszczyk3 and W. Dziewiszek3
1Department of Technology of Drugs, Wrocław University of Medicine, 50-140 Wrocław, Pl. Nankiera 1, Poland
2Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
3Department of Pharmacology, Wrocław University of Medicine,
50-368 Wrocław, ul. Mikulicza-Radeckiego 2, Poland

(Received July 10th, 1998; revised manuscript October 19th, 1998)

Reaction of 2-aminonicotinic acid hydrazide with cyanogen bromide allowed to obtain 2-amino-5-(2-amino-3-pyridyl)-1,3,4-oxadiazole (2), which with 2- or 3-chloropropionyl chloride and 4-chlorobutyryl chloride gave 5-(2-amino-3-pyridyl)-2-(2-chloropropionylamino)-1,3,4-oxadiazole(5),5-(2-amino-3-pyridyl)-2-(3-chloropropionylamino)-1,3,4-oxadiazole (6) and 5-(2-amino-3-pyridyl)-2-(4-chlorobutyrylamino)-1,3,4-oxadiazole (7), respectively. Cyclization of chloroacyl derivative 7 led to 5-(2-amino-3-pyridyl)-2-(2-oxo-1-pyrrolidinyl)-1,3,4-oxadiazole (9). Treatment of oxadiazole 2 with appropriate alkylating agents (1,3-dibromopropane or 1,4-dibromobutane) gave 2-azetidinyl-1,3,4-oxadiazole (10) or 2-pyrrolidinyl-1,3,4-oxadiazole (11). Compounds 3, 4, 7, 10 and 11 were tested towards a psychotropic activity. Compound 10 showed anxiolytic properties and an antiserotonin action, which was confirmed in the test of the black-white box and the m-CPP test, respectively. Crystal structure was determined on a single crystal.

333-338

Triterpenoids. Part XV.
Quinoline Derivatives of Oleanane

by L. Zaprutko
Department of Organic Chemistry, K. Marcinkowski University of Medical Sciences,
Grunwaldzka 6, 60-780 Poznań, Poland

(Received July 27th, 1998; revised manuscript October 21st, 1998)

Olean-12-en-, 11-oxoolean-12-en-, and 12-oxoolean[3,2-b]quinoline-28-oic acid methyl esters (3a-3c) were obtained from the respective 3-oxoderivatives 1a-1c through the C(2) o-nitrobenzylidene derivatives 2a-2c. It was observed that the C(3) carbonyl group had an activating effect on the neighbouring methylene function and the C(2) and C(12) carbonyl group in some derivatives of methyl oleanolate were deprived of this property.

339-346

Analysis of Simple and Single Thermal Desorption
Spectra: Application to Hydrogen (Deuterium)
Desorption from a Thin Gold Film

by L. Zommer and L. Stobiński
Institute of Physical Chemistry, Polish Academy of Sciences,
Kasprzaka 44/52, 01-224 Warszawa, Poland
E-mail:zom@ichf.edu.pl

(Received June 29th, 1998; revised manuscript October 8th, 1998)

An effective method of computing kinetic parameters (n, , Ed) of thermal desorption from the experimental thermal desorption curve has been elaborated. So far the Downhill Simplex Method in Multidimensions for minimization and the Runge-Kutta method for solvation the Polanyi-Wigner equation, for any set of kinetic parameters proposed by the Simplex Method, have been applied. The fitting procedure is demonstrated on examples of low coverage thermal desorption spectra for H (D) adsorbed on a thin gold film surface at 78 K.

347-357

Non-Linear Effects in Spherical Particle Motion in Oscillatory Flowing Gas

by M. Dolata and J.A. Michalski
Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland, e-mail: Dolata@ichf.edu.pl, Jacek@ichf.edu.pl,

(Received May 28th, 1998; revised manuscript October 13th, 1998)

Basing on the Tchen equation, the dynamic characteristics of a system consisted of a little sphere moving in an oscillatory flowing gas are developed. The conditions of appearance of steady points of solutions (node, focus, saddle) are formulated. Numerical solutions show that an additional attractor (asymptotic trajectory) can be found in this system.

359-366

Inhibition of Jack Bean Urease by a Mixture
of Boric Acid and Phosphate Buffer pH 6.96

by B. Krajewska1, W. Zaborska1, M. Leszko1 and Z. Brzózka2
1Jagiellonian University, Faculty of Chemistry, 30-060 Kraków, Ingardena 3, Poland
E-mail: krajewsk@trurl.ch.uj.edu.pl
2Warsaw University of Technology, Department of Analytical Chemistry,
00-664 Warsaw, Noakowskiego 3, Poland

(Received July 9th, 1998; revised manuscript October 26th, 1998)

Inhibition of jack bean urease by a mixture of boric acid and phosphate buffer pH 6.96 was studied. The inhibition constants of the mixture were determined in solutions of phosphate buffer (22-155 mM) by measuring the initial reaction rates for a series of boric acid concentrations (0-3 mM) at a series of substrate concentrations (2-50 mM urea). It was found that boric acid is a simple competitive inhibitor of urease with the inhibition constant of the system changing from 0.23 mM in 22 mM phosphate buffer to 0.76 mM in 155 mM phosphate buffer. It was shown, that boric acid and phosphate buffer pH 6.96 are mutually exclusive competitive inhibitors of jack bean urease. The inhibition constants of boric acid and of phosphate buffer pH 6.96 in an inhibitor-free system were determined to be 0.12 mM and 21 mM, respectively.

367-376

Molecular Structure of Two
1-O-Acylglycosyl Esters of Diclofenac:
1-O-{2-[(2,6-Dichlorophenyl)amino]phenylacetyl}
-2,3,4,6-tetra-O-acetyl-b-D-glucopyranose and 1-O-{2-[(2,6-Dichlorophenyl)amino]phenylacetyl}
-2,3,4-tri-O-acetyl-ß-D-xylopyranose

by E. Kołodziejczyk1,2, K. Suwińska2, A.E. Kozioł1,
G. Enright3 and J. Borowiecka4
1Faculty of Chemistry, Maria Curie-Skłodowska University, 20-031 Lublin, Poland
2Institute of Physical Chemistry, Polish Academy of Sciences,
ul. M. Kasprzaka 44/52, 01-224 Warszawa, Poland
3Steacie Institute for Molecular Sciences, National Research Council of Canada,
Ont. K1A 0R6 Ottawa, Canada
4Institute of Chemistry, Medical University, ul. Muszyńskiego 1, 90-151 ŁódŸ, Poland

(Received August 12th, 1998)

The molecular structure of 8 and 9 has been determined by a single-crystal X-ray analysis. Both chiral esters are derivatives of the non-steroidal antiinflammatory drug diclofenac (1), and have physicochemical properties of potential prodrug. Comparison of the geometry of 2-[(2,6-dichlorophenyl)amino]phenylacetate fragment, observed in eighteen solid-state structures, shows limited flexibility of 1. Two rotations around bonds linking the o-phenyl ring with the carboxyl and dichlorophenyl groups change their relative orientation, but both groups are nearly perpendicular to the o-phenyl plane. The amino group is involved exclusively in intramolecular contacts.

377-383

Structure of N2-[4-(2-Chlorophenyl)-1,3-thiazol-2-yl]-(1R,1S)-6,7-dimethoxy-1-(3-pyridylmethyl)-1,2,3,4-
tetrahydro-2-isoquinolinecarboxo Amide

by J.K. Maurin1,3, Z. Czarnocki2 and B. Paluchowska1
1Institute of Atomic Energy, 05-400 Otwock-¦wierk, Poland
2Chemistry Department, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
3Drug Institute, Chełmska 30/34, 00-725 Warsaw, Poland
E-mail: e08jm@cx1.cyf.gov.pl

(Received July 29th, 1998; revised manuscript October 13th, 1998)

N2-[4-(2-chlorophenyl)-1,3-thiazol-2-yl]-(1R,1S)-6,7-dimethoxy-1-(3-pyridylmethyl)-
1,2,3,4-tetrahydro-2-isoquinolinecarboxo amide (C27H25ClN4O3S) combines the aminothiazole fragment with the isoquinoline segment of known pharmacological activity. Conformation of a substituent at N2 of isoquinoline is determined by attractive Coulombic interaction between carbonyl oxygen and thiazole sulphur atom.

385-389

Synthesis and Characterization of Uranium(IV)
Complexes with Furoic and Isonicotinic Acid Hydrazones

by K.B. Gudasi1 and T.R. Goudar2
1Basaveshwar Science College, Bagalkot - 587101, India
2Department of Chemistry, Karnatak University, Dharwad - 580003, India (Received April 27th, 1998; revised manuscript September 29th, 1998)

391-394

Crystal Structure of the Binuclear Copper(II)
Complex [Cu2(tacn)2(µ-ox)](ClO4)2
(tacn = 1,4,7-triazacyclononane)

by L. Zhang, H.-L. Yan, S.-P. Yan, Z.-H. Jiang, D.-Z. Liao and G.-L. Wang
Department of Chemistry, Nankai University, Tianjin, 300071, China (Received September 10th, 1998)

395-397

Simplified Analogue of Cucurbita maxima Trypsin
Inhibitor III (CMTI-III) Substituted
with L-Norleucine in Position 8

by B. Witczuk, P. Frąszczak, A. Jaśkiewicz, K. Lis, K. Rolka and G. Kupryszewski
Faculty of Chemistry, University of Gdańsk, 80-952 Gdańsk, Sobieskiego 18, Poland (Received August 24th, 1998; revised manuscript October 8th, 1998)

399-401

Catalytic Hydrogen Transfer Over Magnesia. X.
Reduction of 1-Phenyl-1-alkanones by 2-Propanol

by M. Gliński and R. Wróblewska
Warsaw University of Technology (Politechnika), Faculty of Chemistry,
Laboratory of Catalytic Synthesis, Noakowskiego 3, 00-664 Warsaw, Poland E-mail: marekg@ch.pw.edu.pl
(Received July 22nd, 1998; revised manuscript October 10th, 1998)

403-409

Some Problems Concerning Unusual Hydrogen Bonds with Hydride Hydrogen as Proton Acceptor

by L.M. Epstein, N.V. Belkova, E.V. Bakhmutova,
L.N. Saitkulova and E.S. Shubina
A.N. Nesmeyanov Institute of Organoelement Compounds,
Russian Academy of Sciences, 117813 Moscow, Russian Federation
e-mail: shu@ineos.ac.ru (Received November 1997; revised manuscript September 21st, 1998)

411-412

Jednopierwiastkowe Struktury Chemiczne (Homonuclear Chemical Structures)
by Z. Gontarz and A. Górski, Wydawnictwa Naukowo-Techniczne, Warszawa 1998
(413 pp.) (in Polish)

reviewed by S. Siekierski

413

Stephen J. Lippard, Jeremy M. Berg "Principles of Bioinorganic Chemistry" (in Polish)
Polish edition: "Podstawy Chemii Bionieorganicznej", Wydawnictwo Naukowe PWN SA, Warszawa, 1998, 364 stron

reviewed by H. Kozłowski

414

CALL FOR PAPERS

The Organising Committee kindly announces that in 1999 the Annual XLII Congress of the Polish Chemical Society and of the Association of Engineers and Technicians of Chemical Industry in Poland will be held in Rzeszów on 6-10 September. The participants will be hosted in premises of Rzeszów University of Technology and the scientific events will take place divided into sections and microsymposia under the general motto:
"Chemistry at the threshold of 21st century"

Anyone interested, please contact the Organising Committee at the address:
Komitet Organizacyjny Zjazdu Naukowego PTChem i SITPChem, Rzeszów 1999
Wydział Chemiczny Politechniki Rzeszowskiej
Al. Powstańców Warszawy 6, 35-959 Rzeszów
tel/fax (017) 85-436-55
e-mail:ptchem@prz.rzeszow.pl


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