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41	Author	S.	Requires cookie*
	Title	Synthese und Reaktionsverhalten von Stannyloligosilanen, I. Kettenförmige Stannyloligosilane mit SiMe2-Einheiten
	Abstract	ynthesis an d R e activ ity o f S tan n y lo lig o silan es, I. S tan n y lo lig o silan e C h ain s C o n ta in in g S iM e2 M o ieties
	Reference	Z. Naturforsch. 54b, 278 (1999)
	Published	1999
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	Identifier	ZNB-1999-54b-0278
	Volume	54

42	Author	Z. Naturforsch	Requires cookie*
	Title	Die Kristallstrukturen von Tetra- phenylphosphonium-octahalogenodi- arsenat(III) und -diantimonat(III) mit Acetonitril, (PPh4)2[E2X8] * CH3CN (E = As, Sb; X = CI, Br)
	Abstract	T h e C ry sta l S tru c tu re s o f T etra p h en y l-p h o sp h o n iu m O c ta h a lo g e n o d ia rs e n a te (III) a n d D ia n tim o n a te (III) w ith A ce to n itrile , (P P h 4)2[E 2X 8] • C H 3C N (E = A s, Sb; X = CI, B r) W olfgang C zado, S u san n e R ab e, U lrich M ü ller* O ctachlorodiarsenate(III), Octachlorodianti-m onate(III), Octabrom odiarsenate(III), Crystal Structure
	Reference	Z. Naturforsch. 54b, 288—290 (1999); eingegangen am 4. August 1998
	Published	1999
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	Identifier	ZNB-1999-54b-0288_n
	Volume	54

43	Author	Karin Dölling, Kurt Merzweiler, Christoph Wagner, Horst Weichmann	Requires cookie*
	Title	3-Triorganostannyl-N-diphenylmethylen-alaninestern Synthesis, Structure and Reactivity o f 3-Triorganostannyl-N-diphenylmethylene- alanine Esters
	Abstract	The deprotonation of N-diphenylmethylene-glycine esters, obtained from glycine ester hy drochlorides and benzophenone imine, and reaction of the resulting carbanions with iodo-methyl triorganostannanes gives the 3-triorganostannyl-N-diphenylmethylene-alanine esters Me2RSnCH2CH(N=CPh2)COOR' (la -e\ R = Me, 'Bu; R' = Me, Et, 'Bu, Bz). These title compounds are transformed into their tin monochlorides MeR(Cl)SnCH2CH(N=CPh2)COOR' (2a -e) by a redistribution reaction with Me2SnCl2. IR and NMR data and the crystal structure of Me2(Cl)SnCH2CH(N=CPh2)COOEt (2b) reveal for 2a -e an intramolecular coordination of the ester C = 0 group at the tin atom. Mild two-phase hydrolysis of la -e with IN HC1 gives the 3-triorganostannyl-alanine ester hydrochlorides Me2RSnCH2CH(NH 2)COOR' • HC1 (3a -e). The transformation of 3a -e into the corresponding alanine esters Me2RSnCH2CH (N H 2)COOR' (4a -e) could be realized with NH3 in chloroform. 4a -e are of limited thermal stability.
	Reference	Z. Naturforsch. 54b, 293—299 (1999); eingegangen am 10. November 1998
	Published	1999
	Keywords	Stannyl Alanine Ester Derivatives, Intramolecular Pentakoordination, NMR Data, Crystal Structure
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	Identifier	ZNB-1999-54b-0293
	Volume	54

44	Author	Andreas Böhm, Kurt Polborn, Wolfgang Beck	Requires cookie*
	Title	Metal Complexes of Biologically Important Ligands, CX [1]. Orthopalladation of N-(Diphenylmethylene) Schiff Bases from Peptide Esters -C,N versus C,N,0 Coordination -Crystal Structure of ClPd[C6H4(C6H5)C=N(Gly-L-Pr0-L-Ala-OMe)-C,N,O] with cis/trans Peptide Bonds
	Abstract	The reaction of the N-(diphenylmethylene) Schiff base from glycyl-L-prolyl-L-alanine methyl ester 1 with tetrachloropalladate in the presence of sodium acetate affords the or-thopalladated bicyclic C ,N ,0 chelate 2. Complex 2 was characterized by X-ray diffraction. Remarkably, the unit cell contains two independent molecules, the cis isomer 2a and the trans
	Reference	Z. Naturforsch. 54b, 300—304 (1999); received October 10 1998
	Published	1999
	Keywords	N-(Diphenylmethylene) Peptide Esters, Orthopalladation, C, N, 0 Chelate, cis/trans Peptide Bonds
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	Identifier	ZNB-1999-54b-0300
	Volume	54

45	Author	H. Eickmeier, Bernd Jaschinski, A. Hepp, Jürgen Nuß, Hans Reuter, Roger Blachnik	Requires cookie*
	Title	Tris(ethyldimethylphenylammonium) nonahalogenodibismuthates(III)
	Abstract	Bismuth, Tris(ethyldimethylphenylammonium) nonachlorodibismuthate, Tris(ethyldimethyl-phenylammonium) nonabromodibismuthate, Tris(ethyldimethylphenylammonium) nonaiodo-dibismuthate, Enthalpy of Transition
	Reference	Z. Naturforsch. 54b, 305—313 (1999); received August 7 1998
	Published	1999
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	Identifier	ZNB-1999-54b-0305
	Volume	54

46	Author	Regine Herbst-Irmer, UweK. Lingebiep, Mathias Noltemeyer	Requires cookie*
	Title	2.4.6-Tri-tert-butylphenylaminofluorsilane und Lithium-bis(2,4,6-tri- terf-butylphenyldifluorsilyl)amid -im Kristall ein Polymer 2.4.6-Tri-rm-butylphenylaminofluorosilanes and Lithium-bis(2,4,6-tri-f£Tf- butylphenyldifluorosilyl)amide -in the Crystal a Polymer
	Abstract	2.4.6-Tri-f£T/-butylphenyl Group. Aminofluorosilane, Lithium-fluorosilylamide, 1,3-Siloxane, Tris(fluorosilyl)amine 2,4,6-Tri-ter/-butylphenyltrifluorosilane (1) reacts with lithium amides to give the aminofluo-rosilanes (2 -7); RSiF2NHR' (R = 2,4,6-Me3CC6H 2; R' = H (2), CM e3 (3), SiMe2CM e3 (4)), (R-SiF2)2NH (5), RSiF(NHR')2. R' = CM e3 (6), C6H5 (7). The reaction of 5 with BuLi in THF leads to the formation of the monomeric lithium derivative 8, R-SiF2Li®(THF)3-N " -SiF2R. The polymeric lithium derivative 9 [R-SiF2-N H -SiRF2L i*(T H F)2]" is obtained by recrystallisation of 8 in THF. In 8 and 9 lithium is only coordinated to fluorine and THF. Hydrolysis of 8 or 9 lead to the 1,3-disiloxane 10, (RSiF2)20 . 10 shows linearity at the oxygen and short S i-0 bond lengths.
	Reference	Z. Naturforsch. 54b, 314—320 (1999); eingegangen am 23. Oktober 1998
	Published	1999
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	Identifier	ZNB-1999-54b-0314
	Volume	54

47	Author	Rainer Mattes, Ulrich Voet	Requires cookie*
	Title	Komplexe zweier vierzehngliedriger Tetraazadibenzo-Makrocyclen. Strukturen eines freien Liganden und von Nickel(II)-, Kupfer(II)-und Zink(II)-Komplexen Complexes o f Two 14-Membered N4 Dibenzo Macrocycles. Crystal Structures o f a Free Ligand and o f Nickel(II), Copper(II) and Zinc(II) Complexes
	Abstract	The syntheses and structural characterizations of complexes of two 14-membered macrocy clic trans-N4 dibenzo ligands, 5,7,8,9,14,16,17,18-octahydrodibenzo[e,l]-[l,4,8,l ll-tetraaza-cyclotetradecine-6,15-dimethyl (L3) resp. -6,15-diacetamide (L4), are presented. The crystal structures of five compounds have been determined by single crystal X-ray diffraction. The free ligand L3 has a saddle-shaped structure with intramolecular hydrogen bonds. This conformation of the ligand exists also in the Zn(II) complex in which the metal ion is five-coordinated with the metal center outside the cavity. The coordination polyhedron is intermediate between a trigonal bipyramid and a square pyramid. In c/5-[Ni(L3)(NCS)2] the ligand is folded along an N- • N axis. The nickel ion in this complex shows an approximate octahedral geometry. For Ni(II) and Cu(II) complexes of ligand L the overall geometry is also distorted octahedral. The folding of the ligand causes a d s-N 40 2 coordination.
	Reference	Z. Naturforsch. 54b, 321—328 (1999); eingegangen am 6. Oktober 1998
	Published	1999
	Keywords	Macrocyclic N4-Donor Ligands, Transition Metal Complexes, Crystal Structure
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	TEI-XML for	default:Reihe_B/54/ZNB-1999-54b-0321.pdf
	Identifier	ZNB-1999-54b-0321
	Volume	54

48	Author	Joachim Pickardt, Benedikt Staub	Requires cookie*
	Title	Metallkomplexe mit 2,2'-Dipyridylamin als Liganden: Kristallstrukturen der Komplexe mit CdX2 (X = Cl, Br, I) und CuCN Metal Complexes with 2,2'-Dipyridylamine as Ligand: Crystal Structures o f the Com plexes with CdX2 (X = Cl, Br, I) and CuCN
	Abstract	Reactions of 2,2'-dipyridylamine (dpyam) with cadmium halides yield crystals of [Cd(dpyam)(H20)C l2] (1), [Cd(dpyam)Br2] (2), and [Cd(dpyam)I2] (3). With CuCl2 and KCN a complex [C u(dpyam)C N ]H 20 (4) is obtained. Depending on the size of the halide ions the coordination changes from octahedral in 1 to trigonal bipyramidal in 2 and tetrahedral in 3. The coordination in 4 is trigonal. Due to the geometric strain imposed by the ligand all coordination polyhedra show significant distortions. 1 and 2 form dimers by halide bridges. With the excep tion of 3 all compounds form "supramolecular" structures via hydrogen bonds, e.g. chains or networks.
	Reference	Z. Naturforsch. 54b, 329—336 (1999); eingegangen am 10. Dezember 1998
	Published	1999
	Keywords	2, 2'-Dipyridylamine Complexes, Cadmium Halides, Copper(I) Cyanide, Crystal Structure
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	Identifier	ZNB-1999-54b-0329
	Volume	54

49	Author	Henri Brunner1, ManfredM. Uschiol3, Thomas Neuhierl3, Bernhard Nuberb	Requires cookie*
	Title	Copper Complexes with the Ligand [Cp2MoH2]
	Abstract	The reaction of CuCl with [CP2M0H2] yields the complex [Cu(Cp2M oH2)2Cl]. An X-ray structure analysis shows that the coordination of the copper(I) ion by two [CP2M0H2] lig ands and the chloride ion is pseudo-trigonal planar. The hydride ligands were located by using difference Fourier methods. A manifold of reactions took place when an aqueous so lution of CUSO4 was treated with a solution of [Cp2M oH 2] in dichloromethane in a 1:2 molar ratio. The X-ray structure analysis established a polymeric structure of the complex [Cu(Cp2MoH2)2Cu(Cp2M oH2)S0 4 ]" with two different copper centers.
	Reference	Z. Naturforsch. 54b, 337—340 (1999); received September 25 1998
	Published	1999
	Keywords	Copper, Molybdenum, X-Ray Data
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	Identifier	ZNB-1999-54b-0337
	Volume	54

50	Author	Markus Leirer, Günther Knör, Amd Vogler	Requires cookie*
	Title	Synthesis and Spectroscopic Properties of 1,2-Diiminetricarbonyl- rhenium(I)chloride Complexes with Aliphatic Diimines (or 1,4-Diaza-l,3-butadienes) as Ligands
	Abstract	Re(l,2-diimine)(CO)3Cl complexes with the aliphatic bidentate ligands diiminosuccino-dinitrile (DISN), benzilbisanile (BEAN), bisacetylbisanile (BABA), and benzildiimine (BE DIM) are reported. The compounds show Re(I) to 7r(diimine) metal-to-ligand charge transfer (MLCT) absorptions in the visible spectral region. The energy of these MLCT-transitions de creases in the series BABA > BEDIM > BEAN > DISN, depending on the 7r acceptor properties of the coordinated diimine ligands. The maxima of these CT bands undergo a solvent-dependent shift (negative solvatochromism), which indicates a partial charge redistribution in the excited state. The compounds are not photoluminescent at room temperature and 77 K.
	Reference	Z. Naturforsch. 54b, 341—344 (1999); received December 11 1998
	Published	1999
	Keywords	Charge Transfer, Rhenium Complexes, 1, 4-Diaza-l, 3-butadienes, Solvatochromism
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	Identifier	ZNB-1999-54b-0341
	Volume	54

51	Author	T. Schaper, C. Näther, W. Preetz	Requires cookie*
	Title	Hexahydro-c/oso-hexaborate as a Ligand in Coordination Compounds: A Second Polymorph of [Au2(^-bis-773-B6H6)(PPh3)2]
	Abstract	u-bis-(?7?-Hexahydro-c/0sohexaborato)bis(triphenylphosphine)digold, Polymorphism, Crystal Structure The crystal structure of a second room-temperature polymorph of the complex [Au2(/i-bis-r^-BftHöKPPhih] is presented and compared with the previously reported phase. The change of the solvent which is layered on a solution of [Aui^-bis-r^-BöHöXPPh.^] in CH2CI2 from petroleum ether to n-pentane leads to a second form with fundamental differences in the crystal structure. Instead of the octahedrally shaped crystals, space group Pa 3, the crystals in the present determination are orthorhombic needles crystallizing in space group Pccn with a remarkable increased calculated density from 1.326 to 1.855 Mg/m3.
	Reference	Z. Naturforsch. 54b, 345—348 (1999); received September 28 1998
	Published	1999
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	Identifier	ZNB-1999-54b-0345
	Volume	54

52	Author	C. Drewes, W. Preetz	Requires cookie*
	Title	Darstellung und spektroskopische Charakterisierung von Methylnitro
	Abstract	-c/oso-hexaboraten sowie Kristallstrukturen von cis-(Ph4As)2[B6H4(CH3)(N02)],/ac-(Ph4As)2[B6H3(CH3)(N02)2] CH3CN und /ner-(Ph4P)2[B6H3 (CH3)(N 02)C 2] Synthesis and Spectroscopic Characterization o f Methylnitro-c/oso-hexaborates and Crystal Structures o f m -(P h 4 As)2 [B6H4 (CH3) (N 0 2)],/flc-(P h4A s)2 [B6H3(CH3)(N 0 2)2] • CH3CN and mer-(Ph4 P)2 [B6H3(CH3) (N 0 2)c2] Methylnitrotetrahydro-c/<m>-hexaborate(2-), Methyldinitr0trihydr0-c/as'0-hexab0rate(
	Reference	Z. Naturforsch. 54b, 349—356 (1999); eingegangen am 11. November 1998
	Published	1999
	Keywords	), Crystal Structure, 11B NMR Spectra, Vibrational Spectra
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	Identifier	ZNB-1999-54b-0349
	Volume	54

53	Author	S. Strueß, W. Preetz	Requires cookie*
	Title	Kristallstrukturen, Schwingungsspektren und Normalkoordinatenanalyse von cis-und fraws-[ReCl4 (NCSe)(SeCN)]2' Crystal Structures, Vibrational Spectra, and Normal Coordinate Analysis of cis-and rraA2s-[ReCl4(NCSe)(SeCN)]2~
	Abstract	m-Tetrachloroselenocyanato(N)-selenocyanato(Se)-rhenate(IV), /ra«5-Tetrachloroselenocyanato(N)-selenocyanato(Se)-rhenate(IV), Crystal Structure, Vibrational Spectra, Normal Coordinate Analysis The crystal structures of c/s-(«-Bu4N)2[ReCl4(NCSe)(SeCN)] (monoclinic, space group P 2,/n a = 10.794(3), b = 11.687(3), c = 35.716(4) Ä, ß = 96.97(1)°, Z = 4) and trans-(CH2Py2)[ReCl4(NCSe)(SeCN)] (monoclinic, space group P 2,/c, a = 8.348(2), b = 7.518(1), c -31.295(7) Ä, ß = 97.12(2)°, Z = 4) have been determined by single crystal X-ray diffraction analysis. Based on the molecular parameters of the X-ray determinations the low temperature (10 K) IR and Raman spectra of the (rc-Bu4N) salts have been assigned by normal coordinate analysis. The valence force constants are fd(ReN) = 1.68 and fd(ReSe) =1.15 mdyn/A.
	Reference	Z. Naturforsch. 54b, 357—362 (1999); eingegangen am 3. Dezember 1998
	Published	1999
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	Identifier	ZNB-1999-54b-0357
	Volume	54

54	Author	Lothar Weber, Eckhard Dobbert, Andreas Rausch, Hans-Georg Stammler, Beate Neumann	Requires cookie*
	Title	Synthesis, Structure and Reactivity of 2-Amino-and 2-Imino-2,3-dihydro-1H -1,3,2-diazaboroles
	Abstract	The 2-halo-2,3-dihydro-1H-1,3,2-diazaboroles RN-CH=CH-N(R)BX (la': R = rBu, X = Br; lb: R = 2,6-Me2C6H.v, X = I) were converted into the 2-amino-2,3-dihydro-\H -1,3,2-diazaboroles RN-CH=CH-N(R)B-NH2 (2a: R = /Bu; 2b: 2,6-Me2C6H3) by treatment with dry gaseous ammonia. Similarly reaction of la' with 2,6-dimethylaniline or /BuNHt afforded the corresponding derivates /BuN-CH=CH-N(rBu)BNHR' (3; R 1 = 2,6-Me2C6H3; 4; R1 = rBu). The treatment of la' with the ethylene diamine adduct of lithium acetylide led to the formation of [rBuN-CH=CH-N(/Bu)BN(H)CH2]2 (5). Lithiation of 2 a and subsequent silylation gave 6 (R1 = SiMe3), which was transformed to the diborolylamine [/BuN-CH=CH-N(rBu)B]2NH (7) upon exposure to la'. Borolylketimine /BuN-CH=CH-N(/Bu)B-N=CPh2 (8) and borolylcar-bodiimide fBuN-CH=CHN(/Bu)B-N=C=N-SiMe3 (9) resulted from la' and Ph2C=NSiMe3 or Me3SiN=C=NSiMe3, respectively. All the new compounds were characterized by elemental analyses as well as spectroscopic data (IR, 'H, n B, i3C NMR, MS). Heterocycle 5 was also subjected to an X-ray diffraction analysis.
	Reference	Z. Naturforsch. 54b, 363—371 (1999); eingegangen am 25. September 1998
	Published	1999
	Keywords	Boron, Diazaboroles, Amines, Imines
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	Identifier	ZNB-1999-54b-0363
	Volume	54

55	Author	Andreas Komath, Oliver Blecher	Requires cookie*
	Title	Kristallstruktur und thermische Phasenumwandlung von Tetramethylammoniumcyanid, (Ct^^N+CN- Crystal Structure and Thermal Phase Transition of Tetramethylammonium Cyanide, (CH3)4N+CN~
	Abstract	Tetramethylammonium cyanide crystallizes in the tetragonal space group P4/nmm, Z = 2, with cell dimensions a = 773.6(1), c = 546.8(1) pm. The cyanide ion is disordered in the plane perpendicular to the c-axis indicating a rotation. The room temperature phase undergoes a thermal phase transition at -59.9°C probably caused by an order-disorder transition of the cyanide ion.
	Reference	Z. Naturforsch. 54b, 372—376 (1999); eingegangen am 3. November 1998
	Published	1999
	Keywords	Cyanides, Crystal Structure, Thermal Phase Transition
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	Identifier	ZNB-1999-54b-0372
	Volume	54

56	Author	Bisacetonitril	Requires cookie*
	Title	Kristallstruktur von Hydrogenoxonium-Hexachloroantimonat
	Abstract	The formation of hydrogen bonds to acetonitrile molecules lends stability to the hitherto un known hydrogenoxonium hexachloroantimonate H30 +SbCl6_ . The structure of H30 +SbCl6~ • 2 CH3CN was determined on a single crystal. It crystallises in the orthorhombic space group Pmn2(1) (Nr. 31) with Z = 2, a = 1 12,7(1),b = 988,8(1) and c = 1036,5(1) pm.
	Reference	Z. Naturforsch. 54b, 377—380 (1999); eingegangen am 2. Dezember 1998
	Published	1999
	Keywords	Hydrogenoxonium Hexachloroantimonate Bisacetonitrile, Crystal Structure, Raman Data, Hydrogen Bonds
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	Identifier	ZNB-1999-54b-0377
	Volume	54

57	Author	Joachim Pethe, Joachim Strähle	Requires cookie*
	Title	Synthese und Kristallstruktur von [Au(AuNCO)(AuPPh3)8]Cl Synthesis and Crystal Structure of [Au(AuNCO)(AuPPh3)8]Cl
	Abstract	The photolysis of Cr(CO)6 and Ph3PAuN3 (1:2) in thf yields the unstable cluster cation [(Ph3PAu)5Cr(CO)4]+ that slowly decomposes to form the new homometallic gold cluster [Au(AuNCO)(AuPPh3)8]Cl. The cluster compound crystallizes in form of red needles in the tetragonal space group 14 with a = 2214.1(3), c = 1408.9(2) pm, and Z = 2. The inner skeleton of the cluster with the symmetry C4 consists of a centered square antiprism of nine Au atoms with the square faces of the antiprism being bridged by the AuNCO group, and a C P anion, respectively. The shortest Au-Au distances exist between the central and the 8+1 peripheral Au atoms ranging between 263.5(1) and 270.6(3) pm, the four Au-Cl distances are 280(1) pm.
	Reference	Z. Naturforsch. 54b, 381—384 (1999); eingegangen am 3.Dezember 1998
	Published	1999
	Keywords	Gold Cluster, Synthesis, Crystal Structure
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	Identifier	ZNB-1999-54b-0381
	Volume	54

58	Author	Wolfgang Beck	Requires cookie*
	Title	Metallkomplexe
	Abstract	mit biologisch wichtigen Liganden, CXV [1], Addition von a-Aminosäureestern an [CpFe(CO)3]+: Carbamoyl-komplexe Cp(0C)2Fe-C(0)NHCHRC02R' und Kristallstruktur von Cp(0C)2Fe-C(0)NHCH2C 0 2Et Metal Complexes of Biologically Important Ligands, CXV [1]. Addition of a-Am ino Acid Esters to [CpFe(CO)3]+: Carbamoyl Complexes C p(0C)2Fe-C (0)N H C H R C 02R' and Crystal Structure of C p(0C)2Fe-C (0)N H C H 2C 0 2Et Reinhold Urban, Kurt Polbom [2], Carbamoyl Iron Complexes, a-Amino Acid Esters, Cyclopentadienyl a-Amino acid esters can be added to a carbonyl ligand of [CpFe(C0)3]+CF3S 0 3_ to give the carbamoyl complexes Cp(0 C)2Fe-C(0)NHCHRC02R' (R = H, Me, CHMe2, CH2Ph; R' = Et, Me). This type of reaction may be useful for the marking of peptides at the amino end. The crystal structure of Cp(0C)2Fe-C(0)NHCH2C 0 2Et was determined by X-ray diffraction.
	Reference	Z. Naturforsch. 54b, 385—388 (1999); eingegangen am 20. November 1998
	Published	1999
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	Identifier	ZNB-1999-54b-0385
	Volume	54

59	Author	JuliaA. Rusanova3, PhilipJ. Squattritob, KonstantinV. Domasevitcha, Volodimirn Kokozaya	Requires cookie*
	Title	Structure of a Cs(18-crown-6)N(CN)2*H20 Complex: Assembly of the Dimeric 2:2 Anion Paired Encapsulate by Means of jz2-Bridging Water Molecules
	Abstract	The new macrocyclic complex of composition Cs(18-crown-6)N(CN)2-H20 has been pre
	Reference	Z. Naturforsch. 54b, 389—393 (1999); received October 23 1998
	Published	1999
	Keywords	18-Crown-6, Caesium Macrocyclic Complexes, Dicyanamide, Crystal Structure
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	Identifier	ZNB-1999-54b-0389
	Volume	54

60	Author	M. Ajid, E. Ra, Ahm Ood, T. Ajbakhshb, M. Itra, G. Hassem	Requires cookie*
	Title	Direct Oxidative Deprotection of Trimethylsilyl and Tetrahydropyranyl Ethers Using Alumina-Supported lodobenzene Diacetate under Non-Aqueous Conditions
	Abstract	Trimethylsilyl Ethers, Tetrahydropyranyl Ethers, Alumina-Supported lodobenzene Diacetate Primary and secondary trimethylsilyl and tetrahydropyranyl ethers are converted to their carbonyl compounds efficiently using alumina-supported iodobenzene diacetate.
	Reference	Z. Naturforsch. 54b, 394—396 (1999); received September 14 1998
	Published	1999
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	Identifier	ZNB-1999-54b-0394
	Volume	54

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