POLISH JOURNAL OF CHEMISTRY
Volume 72 Number 11 November 1998
Pages 2357-2518


CONTENTS

Page

INORGANIC CHEMISTRY
2357 Superoxo Rhodium(III) Complexes with Higher Carboxylic and Amino-Carboxylic Acids
as Ligands

— Moszner M. and Ziółkowski J.J.
2366 Spectral and Thermal Studies of Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) Complexes with 2,3-Dichlorobenzoic Acid
— Wołodkiewicz W. and Brzyska W.
ORGANIC CHEMISTRY
2371 10,10'-Biisopinocamphenol - a New Pinane Derivative with C2 Symmetry
— Markowicz S.W.
2378 Cine Substitution in Reaction of Unactivated 2-Halopyridines with 2-Aminopyridine
1-Oxide. Formation of 3-(2-Pyridylamino)-2(1H)-pyridone

— Rykowski A. and Pucko W.
2384 Synthesis of 2,1-Benzisoxazole Derivatives from Nitroarenes and CH Acids in Aprotic Media
— Wróbel Z.
2389 A Convenient Synthesis of -Substituted Vinylphosphonates Based on Dithio- and Selenophosphates
— Maciągiewicz I., Dybowski P. and Skowrońska A.
2394 Cyclic Analogues of Proline-Rich Protein Fragments. Part I. Synthesis and Evaluation
of Immunotropic Activity

— Wirkus-Romanowska I., Ciurak M., Miecznikowska H., Rolka K., Janusz M., Szymaniec S., Krukowska K., Lisowski J. and Kupryszewski G.
2399 Total Synthesis of (+)- and (-)-Corydalisol
— Chrzanowska M., Józkowiak J., Rozwadowska M.D. and Sulima A.
2405 The Stoichiometry and Stability of ß-Cyclodextrin Complexes of Some Aromatic Ketones and Thioketones
— Milewski M., Urjasz W., Maciejewski A. and Augustyniak W.
PHYSICAL CHEMISTRY
2418 Separation of Pyrimidine Bases on HPLC Stationary RP-18 Phase Coated with Calix[4]resorcinarene
— Pietraszkiewicz O. and Pietraszkiewicz M.
2423 Solubilities of Organoboron Compounds in Organic Solvents. 6. Solid-Liquid Equilibria
of Substituted Pyrazaboles in Alcohols and Toluene

— Dąbrowski M., Serwatowski J. and Sporzyński A.
2432 EQCM Study of Charge Transfer During Cadmium Underpotential Deposition on Platinum Electrodes from Acidic Aqueous Solutions
— Daujotis V.
2440 Phase Relations in the Cu2Si(Ge,Sn)Te3-HgTe Systems
— Parasyuk O.V.
2450 ZSM-5 Zeolite Modified with Thallium Ions
— Romotowski T., Komorek J., Stoch J. and Mikołajczyk M.
2455 The Effect of Carburization of Palladium Catalysts on the Hydrogenation of Acetylene-
-Ethylene Mixtures

— Borodziński A.
2463 Studies of Trioctylmethylammonium Chloride by Dielectric Spectroscopy
— Elsebrock R., Stockhausen M., Czechowski G. and Jadżyn J.
2471 Interaction of Nitrobenzene with MgO Surface by Temperature Programmed Desorption and ESR Spectroscopy
— Duński H., JóŸwiak W.K., Paryjczak T. and Wysocki S.
2486 Spectrophotometric Study of Thermodynamics and Kinetics of Charge-Transfer Complexation of Dibenzopyridino-18-crown-6 with Iodine in Chloroform Solution
— Zolgharnein J. and Shamsipur M.
CRYSTAL AND MOLECULAR STRUCTURE
2493 Crystal Structure of Nitromethane Solvated (-)-2,(3,4-Dimethoxyphenyl)-4-phenyl-5-phthalimido-1,3-dithiane
— Ratajczak-Sitarz M., Rozwadowska M.D. and Katrusiak A.
2500 The Structure of 7,8-Dimethoxy-3-oxo-3a,4,5,9b-tetrahydroisoquinolino-[1,2b]thiazolidine
— Kosturkiewicz Z. and Sulima A.
COMMUNICATIONS
2504 Synthesis and Magnetism of Manganese(II) and Nickel(II) Complexes with Two Dimensional Structure
— Li W.H., Xu J.Q., Shi J.M., Wang R.Z., Yang G.Y., Sun H.R., Wang T.G., Cheng P. and Liao D.Z.
2507 Reactivity of Benzo[h]naphthyridine N-Oxides
— Zujewska T. and Bachowska B.
2510 Synthesis and Crystal Structure of Manganese(II) Binuclear Complex Bridged by the Reduced Derivative of Nitronyl Nitroxide
— Zhang L., Liao D.Z., Jiang Z.H., Yan S.P., Wang G.L., Shen P.W., Yao X.K. and Wang H.G.
2514 The Reactivity of Monosubstituted Benzenes Towards Reactive Species Formed in the Fe(II)/HOOH Aqueous System
— Płoszyńska J., Kowalski J. and Sobkowiak A.
2517 IUPAC Recommendations on Nomenclature and Symbols.


ABSTRACTS


2357-2365

Superoxo Rhodium(III) Complexes
with Higher Carboxylic and Amino-Carboxylic
Acids as Ligands

by M. Moszner and J.J. Ziółkowski
Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie Str., 50-383 Wrocław, Poland

(Received April 10th, 1998; revised manuscript July 27th, 1998)

Replacement of H2O and/or OH-ligands in the [Rh2(O2-)(OH)2(H2O)n]3+ cation by carboxylate ions: RCO2- (R = C2H5, C3H7, C4H9, (CH3)3), glycine, L-aspartic acid and L-proline have been studied by electronic and ESR spectra. Two new superoxo rhodium(III) carboxylates formulated as [Rh2(O2-)(OH)(RCO2)4]n, (R = C2H5(1), C3H7(2)), have been synthesized in the reaction between the rhodium(III) superoxo hydroxide, assumed to be [Rh2(O2-)(OH)2+m(H2O)n-m] with RCO2H. Reaction products were characterized by elemental analysis, UV-VIS, IR, ESR spectroscopies and magnetic susceptibility measurements. The results indicated the formation both the superoxo rhodium(III) carboxylates and amino-carboxylates, containing the [Rh2(O2-)]5+ core of higher stability in the compounds with the amino-carboxylic acid anions.

2366-2370

Spectral and Thermal Studies of Co(II), Ni(II),
Cu(II), Zn(II) and Cd(II) Complexes with
2,3-Dichlorobenzoic Acid

by W. Wołodkiewicz and W. Brzyska
Department of Inorganic and General Chemistry, Faculty of Chemistry,
Maria Curie-Skłodowska University, 20-031 Lublin, Poland

(Received April 16th, 1998; revised manuscript July 27th, 1998)

The title compounds were prepared and their solubility in water at 295 K (10-2-10-1 mol/dm3), the IR spectra and X-ray diffractograms complexes were recorded, and their thermal decomposition in air was investigated. During heating the hydrated complexes (Co, Ni, Cd) lose crystallization water molecules in one step and the anhydrous compounds decompose to oxides (Co, Ni, Zn: 5 and 10 K/min and Cu: 5 K/min heating rate) or to gaseous products (Cu: 10 K/min, Cd: 5 and 10 K/min heating rate).

2371-2377

10,10' -Biisopinocampheol - a New Pinane Derivative with C2 Symmetry

by S. W. Markowicz
Institute of Organic Chemistry, Technical University of ŁódŸ,
ul. Żeromskiego 116, 90-924 ŁódŸ, Poland

(Received April 2nd, 1998; revised manuscript June 19th, 1998)

The optically pure title compound was obtained from (+)--pinene (e.e. = 70%) via myrtenyl bromide and corresponding 1,5-hexadiene.

2378-2383

Cine Substitution in Reaction of Unactivated
2-Halopyridines with 2-Aminopyridine 1-Oxide.
Formation of 3-(2-Pyridylamino)-2(1H)-pyridone [1]

by A. Rykowski1 and W. Pucko2
1Institute of Chemistry, Agricultural and Teachers University, 3-go Maja 54, 08-110 Siedlce, Poland
2Pharmaceutical Institute, Rydygiera 8, 01-793 Warsaw, Poland

(Received June 6th, 1998; revised manuscript June 19th, 1998)

Reaction of 2-aminopyridine 1-oxide 1a with 2-fluoropyridine 5a in DMF at 140°C gave 2-(2-pyridylamino)pyridine 1-oxide 6 (41%) along with bis(2-pyridyl)amine 7 (5%). However, heating in melt of 1a with 2-chloropyridine 5b or 2-bromopyridine 5c in the presence of dry potassium carbonate at 175°C provided 3-(2-pyridylamino)-2(1H)-pyridone 9 as cine substitution product. Compound 9 results from the nucleophilic attack of the N-oxide on the carbon atom bearing halogen to give corresponding cation 17, which rearranges to cine substitution product 9 via anhydro-base 18.

2384-2388

Synthesis of 2,1-Benzisoxazole Derivatives
from Nitroarenes and CH Acids in Aprotic Media

by Z. Wróbel
Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
e-mail: WROBEL@ICHF.EDU.PL

(Received June 26th, 1998)

DBU/MgCl2 mediated reaction between nitroarenes and some CH acids bearing leaving group lead to 2,1-benzisoxazole derivatives under aprotic conditions. Ortho- directing effect was observed.

2389-2393

A Convenient Synthesis of -Substituted
Vinylphosphonates Based on Dithio-
and Selenophosphates

by I. Maciągiewicz, P. Dybowski and A. Skowrońska
Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 ŁódŸ, Sienkiewicza 112, e-mail: askow@bilbo.cbmm.lodz.pl, Poland

(Received June 3rd, 1998; revised manuscript June 29th, 1998)

A convenient synthesis of -substituted vinylphosphonates based on the reaction of readily available S-(-oxoalkyl)dithiophosphates and Se-(-oxoalkyl)selenophosphates with sodium dialkyl phosphites is described.

2394-2398

Cyclic Analogues of Proline-Rich Protein Fragments. Part I. Synthesis and Evaluation of
Immunotropic Activity

by I. Wirkus-Romanowska1, M. Ciurak1, H. Miecznikowska1, K. Rolka1,
M. Janusz2, S. Szymaniec2, K. Krukowska2, J. Lisowski2 and G. Kupryszewski1
1Faculty of Chemistry, University of Gdańsk, 80-952 Gdańsk, Sobieskiego 18, Poland
2Institute of Immunology and Experimental Therapy, Polish Academy of Sciences,
53-114 Wrocław, Poland

(Received June 1st, 1998; revised manuscript July 3rd, 1998)

Proline-rich protein (PRP), isolated from ovine colostrum, possesses strong immunotropic activity. The nonapeptide (Val-Glu-Ser-Tyr-Val-Pro-Leu-Phe-Pro) and the hexapeptide (Tyr-Val-Pro-Leu-Phe-Pro) PRP fragments revealed biological activity similar to that of the native protein. Seeking for analogues of PRP fragments with constrained structure, two cyclic peptides were synthesized by the solid phase method:
Cys-Val-Glu-Ser-Tyr-Val-Pro-Leu-Phe-Pro-Cys and
Ac-Glu-Tyr-Val-Pro-Leu-Phe-Pro-Lys-NH2. Immunotropic activity of both peptides in murine system was the same as for the linear nonapeptide, whereas all three peptides were practically inactive in human system, where resistance to hydrocortisone and induction of two cytokinins IFN and TNF were used as indicators, respectively.

2399-2404

Total Synthesis of (+)- and (-)-Corydalisol

by M. Chrzanowska, J. Józkowiak, M.D. Rozwadowska and A. Sulima
Faculty of Chemistry, A. Mickiewicz University, 60-780 Poznań, Poland

(Received June 17th, 1998; revised manuscript July 6th, 1998)

The first total synthesis of enantiomerically enriched (+)- and (-)-corydalisol (1) has been performed by addition of lithiated optically pure 1,3-dithiane 3b to hydrastinine chloride (2a), followed by desulfurization, separation of diastereomers and reduction with lithium aluminum hydride.

2405-2417

The Stoichiometry and Stability of -Cyclodextrin
Complexes of Some Aromatic Ketones and Thioketones

by M. Milewski1, W. Urjasz1, A. Maciejewski1,2 and W. Augustyniak1
1Faculty of Chemistry, Adam Mickiewicz University, ul. Grunwaldzka 6, 60-780 Poznań, Poland
2Apparatus Laboratory, Adam Mickiewicz University, Poznań, Poland
E-mail: ketjow@chem.amu.edu.pl

(Received March 23rd, 1998; revised manuscript July 9th, 1998)

Stoichiometry and stability constants of -cyclodextrin (-CD) complexes of several aromatic ketones and the corresponding thioketones were determined by the spectrophotometric and solubility methods. The solubility method with high-performance liquid chromatography (HPLC) detection of the solute concentration proved to be very convenient in determination of the stability constant for the least soluble thioketone. The formation constants were correlated with 1-octanol-water partition coefficients, which vary over more than five orders of magnitude for compounds studied. The hydrophobic interaction and dispersion forces were found to be the most important sources of the complex stability. Relatively strong hydrogen bonds between the ketone molecules and water destabilize their -cyclodextrin complexes. Stoichiometry of all -cyclodextrin complexes studied was found to be 1:1. The synthesis of a new alkyl derivative of 4H-1-benzopyran-4-one and 4H-1-benzopyran-4-thione was described.

2418-2422

Separation of Pyrimidine Bases on HPLC Stationary RP-18 Phase Coated with Calix[4]resorcinarene

by O. Pietraszkiewicz and M. Pietraszkiewicz
Institute of Physical Chemistry, Polish Academy of Sciences, 01224 Warsaw, Kasprzaka 44/52, Poland
E-mail: pietrasz@ichf.edu.pl

(Received April 21st, 1998; revised manuscript June 5th, 1998)

The calix[4]resorcinarene-coated RP-18 phases were found to be useful beds for HPLC separation of thymine, cytosine and uracil. Typical lipophilic calix[4]resorcinarene prepared from lauryl aldehyde and resorcinol was used.

2423-2431

Solubilities of Organoboron Compounds
in Organic Solvents. 6. Solid-Liquid Equilibria of
Substituted Pyrazaboles in Alcohols and Toluene

by M. Dšbrowski, J. Serwatowski and A. Sporzyński
Warsaw University of Technology (Politechnika), Faculty of Chemistry,
Noakowskiego 3, 00-664 Warsaw, Poland

(Received March 31st, 1998; revised manuscript June 15th, 1998)

The solubility of substituted pyrazaboles: 1,3,5,7-tetramethylpyrazabole (TMP) and 1,3,5,7-tetramethyl-4,4,8,8-tetraphenylpyrazabole (TMTFP) in methanol, ethanol, 2-propanol, tert-butanol and toluene have been determined by a dynamic method at temperatures ranging from the boiling point of the solvent to 285 K. Introduction of the substituents to a pyrazabole molecule strongly decreases the solubility in alcohols. The results have been correlated by the Wilson, UNIQUAC and UNIQUAC ASM equations. The best results were obtained for UNIQUAC ASM equation with the average root mean square deviation = 1.5 K.

2432-2439

EQCM Study of Charge Transfer During Cadmium Underpotential Deposition on Platinum Electrodes
from Acidic Aqueous Solutions

by V. Daujotis
Department of General and Inorganic Chemistry, Vilnius University, 2734 Vilnius, Lithuania;
E-mail: vytautas.daujotis@chf.vu.lt

(Received March 30th, 1998; revised manuscript June 30th, 1998)

The potential dependence of the formal partial charge number for cadmium(II) underpotential deposition (upd) on platinum was obtained, using electrochemistry and piezoelectric microgravimetry. The comparison of this dependence with the formal partial charge number, calculated on the basis of earlier proposed mechanism of cadmium(II) upd, supports this mechanism, according to it the electrosorption valency for the cadmium(II) adsorption on platinum equals 1 and 2.

2440-2449

Phase Relations in the Cu2Si(Ge,Sn)Te3-HgTe Systems

by 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 May 19th, 1998; revised manuscript July 6th, 1998)

The Cu2Si(Ge,Sn)Te3-HgTe systems were investigated using differential thermal, X-ray phase and microstructural analysis. Existence of the quaternary Cu2HgSiTe4 and Cu2HgGeTe4 phases, which melt congruently at 898 and 805 K respectively, have been established in Cu2SiTe3-HgTe and Cu2GeTe3-HgTe systems. The Cu2HgSnTe4 phase is a part of solid solution on the basis of Cu2SnTe3 in Cu2SnTe3-HgTe section. The solid solution on the basis of Cu2SiTe3 contains 7 mol% HgTe and the one on the basis of Cu2GeTe3 contains 12 mol% HgTe. The solid solubility in HgTe at 670 K is 2.5 mol% Cu2SiTe3, 4 mol% Cu2GeTe3 and 5.5 mol% Cu2SnTe3.

2450-2454

ZSM-5 Zeolite Modified with Thallium Ions

by T. Romotowski, J. Komorek, J. Stoch and M. Mikołajczyk
Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences,
ul. Niezapominajek, 30-239 Cracow, Poland

(Received April 3rd, 1998; revised manuscript July 6th, 1998)

ZSM-5 zeolite modified with Tl has been investigated with XRD, IR and XPS spectroscopies. Thallium Tl+ ions were introduced in the exchange reaction in water medium, accompanied by exchange of Na+ with H+. From XPS results follows that more likely thallium atoms have been incorporated to the ZSM-5 zeolite lattice as TI3+ species, strongly polarized by framework-forming elements, than as TI+ species. All TIHNa-ZSM-5 zeolite samples catalyzed ammoxidation of m-xylene. X-ray diffractograms before and after ammoxidation proved the preservation of the ZSM-5 zeolite structure.

2455-2462

The Effect of Carburization of Palladium Catalysts
on the Hydrogenation of Acetylene-Ethylene Mixtures

by A. Borodziński
Department of Catalysis on Metals, Institute of Physical Chemistry, Polish Academy of Sciences,
ul. Kasprzaka 44/52, 01-224 Warsaw, Poland

(Received June 4th, 1998; revised manuscript July 15th, 1998)

During the hydrogenation of acetylene-ethylene mixtures on palladium catalysts, the rate of acetylene disappearance and the concentration of carbon dissolved in the bulk palladium increase similarly for samples metal crystallite size << 25 nm. Such a positive correlation supports the hypothesis that carburization of palladium is responsible for the increase of the rate of acetylene disappearance during againg of the catalyst. The maximum concentration of carbon in palladium at the steady-state depends on the temperature of the reaction and on the crystallite size. This concentration increases with carburization temperature and decreases with the increase of Pd crystallite size. The presence of supersaturated solution of carbon in Pd at 50°C is possible, due to a diffusion-hindered frozen state in the bulk. The catalytic properties of such a sample match the behavior of partially carburized Pd catalyst at steady-state conditions. This result strongly suggests that, in both cases, concentrations of surface carbon are similar.

2463-2470

Studies of Trioctylmethylammonium Chloride
by Dielectric Spectroscopy

by R. Elsebrock1, M. Stockhausen1, G. Czechowski2 and J. Jadżyn2
1Institut fuer Physikalische Chemie, Universitaet Muenster, Schlossplatz 4/7, D-48149 Muenster, Germany
2Institute of Molecular Physics, Polish Academy of Sciences,
Smoluchowskiego 17, 60-179 Poznań, Poland

(Received June 17th, 1998; revised manuscript July 15th, 1998)

The dielectric relaxation studies of trioctylmethylammonium chloride (TOMAC) in pure state and in n-heptane, iso-octane and 1,4-dioxane solutions have been performed in the frequency range 100 kHz to 36 GHz at 20°C and 50°C. The dielectric spectra have been formally described as a sum of the conductivity and two relaxational contributions. The viscosity dependence of the relaxation time, corresponding to the contribution appearing in low frequency region, shows full analogy to the "limiting" behaviour of many electrolyte solutions.

2471-2485

Interaction of Nitrobenzene with MgO Surface
by Temperature Programmed Desorption
and ESR Spectroscopy

by H. Duński2, W.K. JóŸwiak1, T. Paryjczak1 and S. Wysocki2
1Institute of General and Ecological Chemistry,
2Institute of General Food Chemistry, Technical University of ŁódŸ, 90-924 ŁódŸ, ul Żwirki 36, Poland

(Received February 9th, 1998; revised manuscript July 20th, 1998)

The adsorption of nitrobenzene on the surface of magnesium oxide has been studied by TPD and ESR methods. The high temperature activation of MgO reveals the presence of low coordinated oxygen ions (LC), which are the one-electron donor (reducing) sites of MgO surface, resulting in the formation of different nitrobenzene anion radicals. The corner O3C2- and probably the edge O4C2- lattice ions are the source of single electrons to the adsorbed nitrobenzene molecules. Depending on adsorption temperature and surface coverage, there are visible at least three forms of NB radicals in ESR spectra with different values of the hyperfine splitting (A||N). These forms differ in thermal stability. The small variations of particular A||N value was attributed to the different chemical environment of the low coordinated adsorption sites on MgO surface.

2486-2492

Spectrophotometric Study of Thermodynamics
and Kinetics of Charge-Transfer Complexation
of Dibenzopyridino-18-crown-6 with Iodine
in Chloroform Solution

by J. Zolgharnein and M. Shamsipur
Department of Chemistry, Razi University, Kermanshah, Iran

(Received May 19th, 1998; revised manuscript July 21st, 1998)

The charge-transfer complexation reaction between iodine and dibenzopyridino-18-crown-6 (DBPY18C6) has been investigated spectrophotometrically in chloroform solution at different temperatures. The resulting complex was formulated as (DBPY18C6...I+)man I3-. The enthalpy and entropy of the complex formation were evaluated from the temperature dependence of the formation constant. The resulting charge-transfer complex is both enthalpy and entropy stabilized. The rate constants at various temperatures and the activation parameters were evaluated.

2493-2499

Crystal Structure of Nitromethane Solvated
(-)-2(3,4-Dimethoxyphenyl)-4-phenyl-
-5-phthalimido-1,3-dithiane

by M. Ratajczak-Sitarz, M.D. Rozwadowska and A. Katrusiak
Faculty of Chemistry, Adam Mickiewicz University, ul. Grunwaldzka 6, 60-780 Poznań, Poland

(Received May 25th, 1998; revised manuscript June 23rd, 1998)

The crystal structure of the title solvate has been determined by X-ray diffraction with R = 0.065. The 1,3-dithiane ring presents a chair conformation, the substituents at C(2), C(4) and C(5) are all in equatorial positions and the molecular ratio of the solvate is 1:1.

2500-2503

The Structure of 7,8-Dimethoxy-3-oxo-3a,4,5,9b-tetra-
hydroisoquinolino-[1,2b]thiazolidine

by Z. Kosturkiewicz and A. Sulima
Faculty of Chemistry, A Mickiewicz University, ul. Grunwaldzka 6, 60-780 Poznań, Poland

(Received April 17th, 1998; revised manuscript July 8th, 1998)

The crystal structure of 7,8-dimethoxy-3-oxo-3a,4,5,9-tetrahydroisoquinolino-[1,2b] thiazolidine has been investigated by X-ray diffraction methods. Crystals are monoclinic, space group P21/c, a = 19.789(2), b = 7.454(1), c = 8.917 , = 100.43(1)°, Z = 4. The structure was solved by direct methods and refined to R = 0.0329 for 2110 observed reflections. The sum of three bond angles around N atom is 359.3(3)°, showing its near planar surrounding. The tetrahydroisoquinoline moiety is composed of the planar aromatic ring and hydrogenated heterocyclic ring having the conformation of non-ideal sofa. The next condensed heterocyclic five-membered ring accepts the form of envelope.This is the first published crystal structure of tetrahydroisoquinoline moiety fused with sulfur containing five-membered ring.

2504-2506

Synthesis and Magnetism of Manganese(II) and Nickel(II) Complexes with Two Dimensional Structure

by W.H. Li1, J.Q. Xu2, J.M. Shi1 R.Z. Wang2, G.Y. Yang2,
H.R. Sun2, T.G. Wang2, P. Cheng3 and D.Z. Liao3
1Department of Chemistry, Shandong Normal University, Jinan 250014, P.R. China
State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P.R. China
2Department of Chemistry, Jilin University, Changchun 130023, P.R. China
3Department of Chemistry, Nankai University, Tianjin 300071, P.R. China

(Received May 29th, 1998; revised manuscript June 29th, 1998)

2507-2509

Reactivity of Benzo[h]naphthyridine N-Oxides

by T. Zujewska and B. Bachowska
Institute of Chemistry, Pedagogical University, PL-42-201 Częstochowa, Poland

(Received April 27th, 1998; revised manuscript July 8th, 1998)

2510-2513

Synthesis and Crystal Structure of Manganese(II)
Binuclear Complex Bridged by the Reduced
Derivative of Nitronyl Nitroxide

by L. Zhang1, D.-Z. Liao1, Z.-H. Jiang1, S.-P. Yan1, G.-L. Wang1,
P.-W. Shen1, X.-K. Yao2 and H.-G. Wang2
1Department of Chemistry, Nankai University, Tianjin, 300071, China
The State Key Laboratory of Nanjing Univerisity, Nanjing, 210008, China
2Central Laboratory, Nankai University, Tianjin, 300071, China

(Received May 12th, 1998; revised manuscript July 13th, 1998)

2514-2516

The Reactivity of Monosubstituted Benzenes
Towards Reactive Species Formed in the
Fe(II)/HOOH Aqueous System

by J. Płoszyńska, J. Kowalski and A. Sobkowiak
Faculty of Chemistry, Rzeszów University of Technology, P. O. Box 85, 35-959 Rzeszów, Poland
E-mail: asobkow@prz.rzeszow.pl

(Received May 11th, 1998; revised manuscript July 29th, 1998)

2517-2518

IUPAC RECOMMENDATIONS ON NOMENCLATURE AND SYMBOLS


  • Nomenclature of Organometallic Compounds of the Transition Elements
  • Definitions of Terms for Diffusion in the Solid State
  • Classification and Use of Terms for Amplification and Related Reactions


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