¹Institute of Inorganic Chemistry, Slovak Academy of Sciences, SK-84236 Bratislava, Slovakia
E-mail: uachmoju@savba.sk
²Department of Biochemistry and Microbiology, Faculty of Chemical Technology,
Slovak University of Technology, SK-81237 Bratislava, Slovakia
³Department of Inorganic Chemistry, Faculty of Chemical Technology,
Slovak University of Technology, SK-81237 Bratislava, Slovakia

The compounds [Cu(ac)₂(Et₂na)]₂^.Et₂na^.2H₂O (I), Cu(Clac)₂(Et₂na)₃ (II), Cu(Cl₂ac)₂(Et₂na)₂^.2H₂O (III), [Cu(ac)₂mpc]₂^.2CH₃OH (IV), Cu(Clac)₂(mpc) (V), Cu(Cl₂ac)₂(mpc)₂ (VI), Cu(Cl₃ac)₂(mpc)₂ (VII), Cu(pc)^.5H₂O (VIII), where ac = CH₃COO^-, Clac = ClCH₂COO^-, Cl₂ac = Cl₂CHCOO^-, Cl₃ac = Cl₃CCOO^-, Et₂na = N,N-diethylnicotinamide, mpc = methyl-3-pyridyl carbamate and pc = 2,6-pyridinedicarboxylate have been prepared and characterized by elemental analysis, IR, EPR and electronic spectra. Their antimicrobial effects have been tested on various fungal strains. Significant morphological changes of Botrytic cinerea were observed by the compounds V and VII. The highest antimicrobial effects were manifested by compound IV. IC₅₀ and MIC of that compound are 220 and 1000 mg/ml against Rhizopus oryzae, 250 and 500 mg/ml against Microsporum gypseum, respectively. IR data suggest a unidentate coordination of carboxylate to Cu(II). Et₂na and mpc were coordinated through the N atom of the heterocyclic rings. EPR spectra suggest a dimeric structure of complexes I and IV and monomeric structure of complexes II, III, V-VIII.

Department of Inorganic and Physical Chemistry, Volyn State University,
Voli av. 13, Lutsk 263009, Ukraine

(Received December 1st, 1998; revised manuscript January 21st, 1999)

Phase equilibria in the CuGaTe₂-HgTe and CuInTe₂-HgTe systems are investigated by differential thermal, X-ray phase and microstructural analyses. Both systems are of quasibinary, peritectic type, resulting in the formation of solid solutions. Solid solubility in HgTe varies from 0-31 mol% for CuGaTe₂ and from 0-64 mol% for CuInTe₂. The solid solution based on CuInTe₂ does not exceed 4 mol% HgTe and the one based on CuGaTe₂ contains less than 2 mol% HgTe.

Institute of Chemistry, University of Opole, Oleska 48, 45-052 Opole, Poland
E-mail: zaleski@uni.opole.pl

Bis(ethylammonium) pentachloroantimonate(III)-ethylammonium chloride belongs to alkylammonium chloroantimonates(III). The anionic sublattice of (C₂H₅NH₃)₂SbCl₅^.(C₂H₅NH₃)Cl is built of isolated Sb₂Cl₁₀^4- units composed of two SbCl₆^3- octahedra, connected by edge and two single chlorine Cl^- ions. There are three crystallographically non-equivalent ethylammonium cations, two of them are disordered at room temperature and all of them are ordered at 90 K. The disorder is realized by two positions for carbon atoms. Ethylammonium cations are connected to the anionic sublattice by N-H...Cl hydrogen bonds. The influence of temperature and hydrogen bonds together with electrostatic interactions on the deformation of the octahedral coordination of Sb^III is discussed.

783-792

¹Department of Chemical Technology of Drugs, Collegium Medicum of Jagiellonian University,
Medyczna 9, 30-688 Kraków, Poland
²Institute of General and Ecological Chemistry, Technical University, Żwirki 36, 90-924 Łódź, Poland

(Received October 8th, 1998; revised manuscript January 22nd, 1999)

Preparation of N-[(7-arylalkyl,7-aryloxyalkyl)-8-theophyllyl]-glycines by condensation of 8-bromo-theophylline with arylalkyl- and aryloxyalkylbromides and aminolysis with glycine is described. The structure of one of the obtained glycine derivatives was confirmed by X-ray analysis. A comparison of the glycine receptor binding model (molecule L-689,560) and the 3-D structure of that molecule indicates serious differences in molecule shape, explaining their inactivity.

Laboratory of Organic Chemistry, Institute of Chemistry, Medical University,
Muszyńskiego 1, 90-151 Łódź, Poland

New derivatives of 2-bromo-2-deoxy hexopyranose, a- and b-glycosyl dithiophosphates 6-11, were synthesized by three methods: (A) by glycosylation of alkyl salts 1-3 of phosphorodithio acids with a-1,2-D-gluco and a-1,2-D-manno dibromides 4, 5; (B) by reaction of 4 or 5 with free phosphorodithio acids 12-14 activated by Lewis acid; (C) by addition of dithioacids 12-14 to 2-bromo-D-glucal 15.

Institute of Organic Chemistry and Technology, Silesian Technical University,
Krzywoustego 4, 44-101 Gliwice, Poland

Reaction of D-ribopyranosylamine or 2,3-O-isopropylidene-D-ribofuranosylamine with 1,4-dinitroimidazoles in aqueous methanol affords appropriate 4-nitroimidazole nucleoside derivatives.

¹Faculty of Chemistry, Jagiellonian University, 30-060 Cracow, Poland
²Josef Stefan Institute, Ljubljana, Slovenia
³Laboratory of Stable Isotopes, Institute of Geology, E.T.H., Zurich, Switzerland

Kinetics and the carbon-13 kinetic isotope effects in the decarboxylation of phenylpropiolic acid in HCOOH/H₂O, 1:1/V:V, solution have been examined between 80-140.13^oC. ¹³C KIE in the decarbonylation of formic acid, proceeding with measurable rate in this medium between 130-150^oC, has been determined also and compared with corresponding values found in the pure HCOOH/H₂O solution. Kinetics and C-13 KIE in the decarboxylation of phenylpropiolic acid in pure water have been investigated subsequently between 100-143 ^oC in all glass reaction vessels sealed under vacuum. The enthalpy of activation of decarboxylation of PPA in pure water, 30.20 kcal/mol, and the entropy of activation, DS^ą = -3.7 e.u., are by 6.7 kcal/mol and 12.5 e.u., respectively, higher than the DH^# and DS^# values found in the decarboxylation of PPA in pure formic acid. The C-13 KIE equal to 1.004-1.005 between 70-100^oC in the pure HCOOH medium increased to C-13 KIE of 1.020 in the case of decarboxylation of PPA at 133.7 ^oC in the initially pure water.

¹Institute of Low Temperature and Structure Research, Polish Academy of Sciences,
ul. Okólna 2, 50-950 Wrocław, Poland
²Institute of General and Ecological Chemistry, Technical University of Łódź, ul. Żwirki 36, 90-924 Łódź, Poland

The crystal and molecular structures of following selected multifunctional phenylsulfones were determined by X-ray diffraction methods using an Enraf-Nonius CAD4S diffractometer: a-(4-biphenylsulfonyl)acetophenone, (I); a-methyl-a-[4-(acetylamino)phenylsulfonyl]acetophenone, (II); 1,1-dichloro-2-phenyl-2-(4-allylsulfonylphenyl)ethene, (III); 1,1-dichloro-2-phenyl-2-(4-chlorosulfonylphenyl)ethene, (IV). The compound (I), (C₂₀H₁₆O₃S), crystallizes in the monoclinic P2_1/c space group with unit cell dimensions: a = 9.0527(6) A, b = 5.333(1) A, c = 34.286(2) A, b= 94.796(5)^o. Analysis of benzene-ring geometry leads to the conclusion that the bond angles and distances within the benzene rings of the four investigated structures seem normal, and only small deviations occur. In (I) all three rings are almost planar and the two rings in the biphenyl are almost coplanar. The compound (II), (C₁₇H₁₇NO₄S), crystallizes in the monoclinic P2_1/c space group with unit cell dimensions: a = 10.943(4) A, b = 8.566(2) A, c = 17.286(4) A, b= 90.57(3)^o. Both rings are almost planar. The compound (III), (C₁₇H₁₄O₂SCl₂), crystallizes in the monoclinic P2_1/c space group with unit cell dimensions: a = 12.577(20) A, b = 18.961(2) A, c = 7.407(2) A, b= 103.83(2)^o. Both rings are almost planar - the dihedral angles in ring A vary from -1.7^o to 1.2^o, and in ring B from -1.7^o to 1.6^o. The planes of the two rings are nearly perpendicular to each other. The compound (IV), (C₁₄H₉O₂SCl₃), crystallizes in the monoclinic P2_1/n space group with two independent molecules in the unit cell (Z = 8), and with unit cell dimensions: a = 9.0527(6) A, b = 5.333(1) A, c = 34.286(2) A, b= 94.796(5)^o. The two molecules are related to an approximative non-crystallographic symmetry centre. All four rings are almost planar. The increase of the bond angles at C11 and C31 atoms is caused by the high electronegativity of the SO₂ group. The A and B rings and the C and D rings are almost perpendicular to each other. The respective bond lengths and angles of the two independent molecules are very similar. The phenacyl phenyl sulphone derivatives are examples of a system with acidic C-H bonds. In such interesting systems many weak interactions (and/or very weak hydrogen bonds C-H^...O (or C-H^...N) occur. This is often observed in biologically active compounds (for example nucleosides). In the crystal of (I) there are 10 such interactions (6 intermolecular and 4 intramolecular). In the crystal of (II) there are 11 such interactions (6 intermolecular and 5 intramolecular). In the crystal of (III) there are 5 such interactions (3 intermolecular and 2 intramolecular). In the crystal of (IV) there are 10 such interactions (6 intermolecular and 4 intramolecular).

¹Institute of General and Ecological Chemistry, Technical University of Łódź,
ul. Żwirki 36, 90-924 Łódź, Poland
²Department of Organic Chemistry, Medical University of Gdańsk,
Al. Gen. J. Hallera 107, 80-416 Gdańsk, Poland

Structures of the two dimethylthiomethylene-2-pyridinecarboxamide hydrazones have been examined spectroscopically and by X-ray diffraction to establish the dominant tautomeric form and conformation. The two crystal structures are very similar with approximately planar conformation and intramolecular hydrogen bond between 4-imine group as hydrogen donor and pyridyl N atom as an acceptor. Several significant differences found may be easily explained by phenyl substitution in one of the compounds. The benzene ring in compound 2 is twisted by about 40^o in relation to the mean molecular plane due to packing forces. An interesting feature of the structures is the deviation of the pyridyl ring by 11-14^o from the mean 2,3,5-triaza-1,3-pentadiene plane in the two structures, despite the intramolecular hydrogen bond spanning the two fragments. It agrees with the elongation of C(4)-pyridine bond to 1.488 A, which corresponds with the lack of conjugation between p electrons of the pyridine ring and a lone pair at adjacent N(4) atom.

Institute of Nuclear Chemistry and Technology, ul. Dorodna 16, 03-195 Warszawa, Poland

The structure of diaquobis(m-trans hydrogen pyrazine-2,3-dicarboxylato N,O,O')copper(II) dihydrate crystals is polymeric. The coordination polyhedron around the Cu(II) ion is an elongated octahedron. The Cu(II) ion and two symmetry related pyrazine-2,3-dicarboxylate (2,3-PZDC) ligands are coplanar and form the basic unit of this structure. Each ligand coordinates the metal with one carboxylate oxygen atom [Cu-O(1) 1.957(3) A] and the nearest heteroring nitrogen atom [Cu-N(1) 2.000(3) A]. The second carboxylic group contributes one carbonyl oxygen atom that coordinates the Cu(II) ion in an adjacent unit [Cu-O(3) 2.414(4) a], giving rise to molecular ribbons composed of Cu(2,3-PZDC)₂ units interconnected by oxygen atoms. The water molecules are involved in a system of hydrogen bonds operating between the ribbons.

¹Institute of General and Ecological Chemistry, Technical University of Łódź,
ul. Żwirki 36, 90-924 Łódź, Poland
²Institute of Low Temperature and Structure Research, Polish Academy of Sciences,
ul. Okólna 2, 50-950 Wrocław, Poland
³Kuma Diffraction Ltd, ul. Akacjowa 15b, 53-122 Wrocław, Poland
⁴Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland

The crystal structure of the following complexes has been determined using a KM4CCD Kuma Diffraction Diffractometer with CCD camera, and the original KM4CCD data collection and KM4RED data reduction programs: tetrachlorobis{m-phenylbis(2-pyridyl)phosphane(P,N,N')}dirhodium(II), [Rh₂Cl₄{PPh(C₅H₄N)₂}₂], (I); tris(m-acetato-kO:kO')(acetic acid-1kO)-m-2-{[(2-methoxyphenyl-2kO)(2-methoxyphenyl)phosphano-2-kP]phenolato-1kO}-dirhodium(II),[Rh₂(OOCCH₃)₃
{P(C₆H₄OCH₃)₂C₆H₄O}HOOCCH₃], (II); dichlorobis{phenylbis(2-pyridyl)phosphane oxide}cobalt(II), [CoCl₂{OP(C₅H₄N)₂}₂(C₆H₅)}₂], (III).

¹Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
²Dipartimento di Chimica, Universita di Sassari, 07100 Sassari, Italy
³CNR IAT CAPA, via Vienna 2, 07100 Sassari, Italy

(Received October 19th, 1998; revised manuscript January 8th, 1999)

¹University of Gdańsk, Department of Chemistry, Sobieskiego 18, 80-952 Gdańsk, Poland
²Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12, 61-704 Poznń, Poland

(Received November 24th, 1998; revised manuscript January 18th, 1999)

Inorganic Chemistry Department, L'viv State University, L'viv, Ukraine

(Received December 14th, 1998; revised manuscript January 18th, 1999)

¹Department of Chemistry, Nankai University, Tianjin, 300071, P. R. China
²State Key Laboratory of Coordination Chemistry Nanjing University, Nanjing, 210008, P. R. China

(Received October 13th, 1998; revised manuscript February 3rd, 1999)

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