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201	Author	AnneU. Tzolino, K. Arsten Bluhm	Requires cookie*
	Title	Synthese und röntgenographische Charakterisierung von zwei neuen Verbindungen des Ludwigit-Strukturtyps: Co5Sn(B0 3)2 0 4 und Co5Mn(B0 3 )20 4
	Abstract	Synthesis and X -R ay C haracterization o f Two New Com pounds with Ludw igite-Structure: C o5S n (B 0 3)20 4 and C o5M n (B 0 3)20 4 The compounds Co5Sn(B 03)20 4 (I) and Co5M n(B03)20 4 (II) were prepared by using a B20 3 flux technique. Single crystals were investigated by X-ray diffraction and showed orthorhombic symmetry, space group D2h-Pbam (No. 55), I a = 944.4; b = 1233.8; c = 310.5 pm; Z = 2 and II a = 925.07; b = 1241.67; c = 305.24 pm; Z = 2. Both compounds are isotypic to the mineral Ludwigite. All metal point positions show an octahedral oxygen coordination. Co2+ and M4+ (M = Sn or Mn) occupy one point position statistically. Both structures contain isolated, trigonal planar B 0 3 units and oxygen atoms that are not coordinated to boron.
	Reference	Z. Naturforsch. 51b, 305—308 (1996); eingegangen am 28. September 1995
	Published	1996
	Keywords	Cobalt, Tin, Manganese, Borate Oxide, Crystal Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0305.pdf
	Identifier	ZNB-1996-51b-0305
	Volume	51

202	Author	Park, K. Arsten Bluhm	Requires cookie*
	Title	Pb6(A s0 4)
	Abstract	[B (A s04)4] -ein neuartiger Kristallstrukturtyp im System Pb0 /B2 0 3 /As2 0 5 mit einem Beitrag über P b(B A s05) Pb6(A s 0 4)[B (A s 0 4)4] -a New Crystal Structure Type in the System P b 0 /B 20 3/A s20 3 w ith R em arks about P b (B A s0 5) C heong- Single crystals of Pb6(A s04)[B(As04)4] (I) and Pb(BAs05) (II) were obtained by melting B->03, As20 5 and PbO at 800 °C. X-ray investigation led to the space group (I): S4 -P4 (Nr. 81) with a = 715.4(1), c = 976.2(3) pm, Z = 1 and (II): C \| -P3, (Nr. 144) with a = 712.2(1), c = 693.5(2) pm, Z = 3. While (II) is isotypic to the Stillwellite structure, Pb^(As04)[B(As04)4] represents a completely novel type of crystal structure. Boron and arsenic are tetrahedrally coordinated by oxygen. These polyhedra form two kinds of isolated anions: A s04'~ and B(A s04)49_. Lead is eightfold coordinated by oxygen.
	Reference	Z. Naturforsch. 51b, 313—318 (1996); eingegangen am 16. Oktober 1995
	Published	1996
	Keywords	Lead, Arsenic, Borate, Synthesis, Crystal Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0313.pdf
	Identifier	ZNB-1996-51b-0313
	Volume	51

203	Author	Silke Busche, K. Arsten Bluhm	Requires cookie*
	Title	Ba2KZn3(B306)(B60 13)
	Abstract	Single crystals of the new compound Ba2KZn3(B30 6)(B60 \| 3) were obtained by using a B20 3 flux technique; they crystallize in an as yet unknown structure type. X-ray investigations led to the space group C '-P l (Nr.2) with lattice parameters a = 705.2(2), b = 712.5(2), c = 1880.3(6), a = 93.43(3)°, ß = 90.72(2)°, 7 = 119.57(2)°, Z = 2. The structure contains (B30 6)3~-rings and a new discrete (B60 13)8~ anion, which is composed of two B 0 4 and two B20 5 units. Zn-+ is tetrahedrally coordinated by oxygen and two out of three tenfold coordinated Ba-sites are statistically occupied by Ba2+ and K+.
	Reference	Z. Naturforsch. 51b, 319—324 (1996); eingegangen am 26. September 1995
	Published	1996
	Keywords	Barium, Potassium, Zinc, Borate, Crystal Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0319.pdf
	Identifier	ZNB-1996-51b-0319
	Volume	51

204	Author	Regina Bettenhausen, Wolfgang Milius, Wolfgang Schnick	Requires cookie*
	Title	Synthese und Kristallstruktur von [H2NMe2]+[(Me2 NH)2 TiCl4 ]_ Synthesis and Crystal Structure of [H2NMe2]+[(Me2NH)2TiCl4]~
	Abstract	The title compound has been synthesized as a green solid by the reaction of M eCl2 SiNHSiM e3 and Ti(NM e2)4 in CH2C12. The crystal structure was determined by single crystal X-ray methods at room temperature (C2/c, a = 1825,7(4), b = 909,9(2), c = 1116,1(2) pm, ß = 125,09(3)°, Z = A,R\= 0,047, wR2 = 0,147) to be an ionic salt [H2NMe2]+[(Me2NH)2TiCl4]" . The central titanium(III) atom of the anion is bound to four Cl atoms and weakly coordinated by two Me2NH ligands.
	Reference	Z. Naturforsch. 53b, 239—241 (1998); eingegangen am 20. November 1997
	Published	1998
	Keywords	N-Silyl Amides, Crystal Structure, Titanium
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0239.pdf
	Identifier	ZNB-1998-53b-0239
	Volume	53

205	Author	Z. Naturforsch	Requires cookie*
	Title	Untersuchungen an Polyhalogeniden, X X X IY
	Abstract	[1] Cäsium(18-Krone-6)dichloroiodat(I), [Cs(C12H 240 6)]IC12 S tu d ies o n P olyhalides, X X X IV [1] C e siu m (1 8 -cro w n -6)d ich lo ro io d ate , [C s(C 12H 240 6)]IC12 M e rv a t E l E ssa w i3, K arl-F rie d ric h T e b b e * b a Chemical D epartm ent, The new compound [Cs(18-crown-6)]ICl2 has been prepared by the reaction of cesium chloride and 18-crown-6 with iodine chloride in ethanol and structurally characterized by X-ray diffrac tion methods. The geometries of the cation [Cs(18-crown-6)]+ and of the anion IC12~ are as expected.
	Reference	Z. Naturforsch. 53b, 263—265 (1998); eingegangen am 5. November 1997
	Published	1998
	Keywords	Polyhalogenide, Dichloroiodate, Crown Complex, Cesium Compound, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0263_n.pdf
	Identifier	ZNB-1998-53b-0263_n
	Volume	53

206	Author	R. Rettich, Hk Müller-Buschbaum	Requires cookie*
	Title	Zur Kristallchemie der Silber-Mangan-Oxovanadate Ag2BaMnV20 8 und (AgCa2)Mn2(V 04)3 On the Crystal Chemistry of the Silver Manganese Oxovanadates Ag?BaMnV?Oo and (AgCa2)Mn2(V 0 4)3
	Reference	Z. Naturforsch. 53b, 291—295 (1998); eingegangen am 12. Januar 1998
	Published	1998
	Keywords	Barium, Calcium, Manganese, Vanadium Oxide, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0291.pdf
	Identifier	ZNB-1998-53b-0291
	Volume	53

207	Author	Z. Naturforsch	Requires cookie*
	Title	Kristallstruktur
	Abstract	von [Mo(CO)3(NCMe)(SrBu)]2 C ry stal S tru c tu re o f [M o (C O)3(N C M e)(S rB u)]2 M ike R. K opp, B e rn h a rd N eu m ü ller* Single crystals of [M o(CO)3(NCM e)(S'Bu)]2 (1) and [{Mo(CO)3}2{Mo(CO)2}{S'Bu}4] (2) were obtained by the reaction of [M o(CO)3(NCM e)3] with [(PhCH2)2GaS'Bu]2 in 1,4-dio-xane. The X-ray structure determination of 1 showed the presence of a Mo2S2 four-membe-red ring with a Mo-Mo bond length of 296,7(1) pm. Space group Pbca, Z = 4, lattice dim en sions at -80 °C: a = 1588,2(3), b = 905,8(1), c = 1676,0(1) pm, R y = 0,0555.
	Reference	Z. Naturforsch. 53b, 378—380 (1998); eingegangen am 8. Dezember 1997
	Published	1998
	Keywords	Molybdenum Carbonyl Complex, Thiolato Complex, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0378.pdf
	Identifier	ZNB-1998-53b-0378
	Volume	53

208	Author	R. Rettich, Hk Müller-Buschbaum	Requires cookie*
	Title	Darstellung und Strukturbeschreibung von NaCa3 Mn(V2O7)(V3 O10) Preparation and Structure o f NaCa3M n(V2O 7)(V3O 10)
	Abstract	Single crystals of NaCa3Mn(V2O7)(V3O 10) have been prepared by crystallization from flux in argon atmosphere. X-Ray single crystal methods led to triclinic symmetry, space group C '-P l,
	Reference	Z. Naturforsch. 53b, 507—511 (1998); eingegangen am 22. Januar 1998
	Published	1998
	Keywords	Sodium, Calcium, Manganese, Vanadium Oxide, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0507.pdf
	Identifier	ZNB-1998-53b-0507
	Volume	53

209	Author	M. Staack, Hk Müller-Buschbaum	Requires cookie*
	Title	Ba4M n2Ag20(As04)4? ein Barium-Mangan-Oxid-Arsenat mit nichtlinearen O-Ag-O-Hanteln. Ba4Mn2Ag2 0 (As0 4 )4, a Barium Manganese Oxide-Arsenate Showing Nonlinear O-Ag-O Dumbbells
	Abstract	Single crystals of Ba4Mn2 Ag20 (A s04)4 have been prepared by solid state reactions using me tallic silver as reactant. X-ray techniques led to monoclinic symmetry, space group D2h-P2,/m,
	Reference	Z. Naturforsch. 53b, 512—516 (1998); eingegangen am 29. Januar 1998
	Published	1998
	Keywords	Barium, Manganese, Silver, Oxide-Arsenate, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0512.pdf
	Identifier	ZNB-1998-53b-0512
	Volume	53

210	Author	Hk Sfreddo, Müller-Buschbaum	Requires cookie*
	Title	Indium partiell in tetraedrischer Sauerstoffkoordination in BaIn2Zn30 7 . Eine Betrachtung zum Ba2Ln2Zn80 13/BaLnAlZn3 0 7 -Typ Partial Tetrahedral Oxygen Coordination of Indium in BaIn2Zn30 7. A Consideration of the Ba2Ln2Zn80 13/BaLnAlZn30 7 Type O
	Abstract	Single crystals of BaIn2Zn30 7 have been prepared by solid state reaction and crystallization from flux. X-ray investigations led to hexagonal symmetry, space group C6V-P6 3mc, lattice constants a = 6.342(1), c = 10.282(1) A, Z = 2. BaIn2Zn30 7 shows tetrahedral positions statistically occupied by In3+ and Zn2+. The crystal structure is isotypic to Ba2Ln2Zn80 13 and BaLnAlZn30 7. A discussion of the related compounds is given.
	Reference	Z. Naturforsch. 53b, 517—520 (1998); eingegangen am 29. Januar 1998
	Published	1998
	Keywords	Barium, Indium, Zinc, Oxide, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0517.pdf
	Identifier	ZNB-1998-53b-0517
	Volume	53

211	Author	S. Meyer, Hk Müller-Buschbaum	Requires cookie*
	Title	Zur Kenntnis eines Vanadyl-Oxocuprat-Phosphats CaCu
	Abstract	(V0)(P0 4) 2 mit Cu2+ auf Positionen der V 0 2+-Ionen und einer kupferreicheren Phase CaCulvt3(VO)o,87(P04)2 On an Vanadyl Oxocuprate Phosphate C aC u(V 0)(P 04)2 Containing Cu2+ at Positions of V 0 2+ Ions and a Copper Rich Phase CaCu, !3(VO)0 g7(P04)2 Single crystals of CaCu(V 0)(P04)2 (I) and CaCu,.i3(VO)o.87(P04)2 (II) have been prepared using solid state reactions in closed and evacuated quartz tubes. X-ray characterization led to
	Reference	Z. Naturforsch. 53b, 521—526 (1998); eingegangen am 4. Februar 1998
	Published	1998
	Keywords	Calcium, Copper, Vanadyl-Phosphate, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0521.pdf
	Identifier	ZNB-1998-53b-0521
	Volume	53

212	Author	B. Wedela, K. Sugiyamaa, Hk Müller-Buschbaum	Requires cookie*
	Title	Verknüpfung von (Te06)6-und (Te06)3(N i06)3-Sechsringen durch TeNiOp-Oktaederdoppel in Pb3Ni4i5Te2? 5 0 15 Connection of (TeOö)6 and (Te06)3(N i0 6)3 Hexagons by T eN i09 Octahedra Double in Pb3Ni4 5Te2 50 15
	Abstract	Single crystals of Pb3Ni4 5Te2 5 0 15 have been prepared by heating pellets of mixtures of PbO, T e02 and nickel hydroxide carbonate to 730 °C in air. X-ray investigations led to hexagonal
	Reference	Z. Naturforsch. 53b, 527—531 (1998); eingegangen am 11. Februar 1998
	Published	1998
	Keywords	Lead, Nickel, Tellurium Oxide, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0527.pdf
	Identifier	ZNB-1998-53b-0527
	Volume	53

213	Author	Tristram Chivers, Xiaorong Li, Masood Parvez	Requires cookie*
	Title	Preparation and X-Ray Structure of 3,5-Dimethyl-1,4-dichloro-1,2,6- thiadiazine-1 -oxide
	Abstract	The title compound was obtained by the reaction of 3,5-dimethyl-2//-l,2,6-thiadiazine-l,l-dioxide with PCI5 in chloroform. It crystallizes in the monoclinic system, space group P2\/c, a = 7.521(7) A, b = 8.400(4) A, c = 13.908(4) Ä, ß = 100.35(4)°, V = 864.4(8) A3, and Z = 4. The S(VI) atom lies 0.43 A out of the plane of the 7r-delocalized NCCCN unit. The mean S-N bond distance is 1.569(3) A.
	Reference	Z. Naturforsch. 53b, 532—534 (1998); received December 18 1997
	Published	1998
	Keywords	Crystal Structure, 1, 2, 6-Thiadiazines, Sulfanuric Chloride
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0532.pdf
	Identifier	ZNB-1998-53b-0532
	Volume	53

214	Author	Reinhold Tacke, Joachim Heermann, Melanie Piilm	Requires cookie*
	Title	Pentafluoro[(4-methyl-1,4-bisazoniacy clohex-1 -yl)methy 1] germanate Hydrate: Synthesis and Crystal Structure of a Zwitterionic A6Ge-Germanate with a GeF5C Framework
	Abstract	The zwitterionic (molecular) A6Ge-germanate pentafluoro[(
	Reference	Z. Naturforsch. 53b, 535—539 (1998); received December 17 1997
	Published	1998
	Keywords	Hexacoordinate Germanium, Zwitterion, Preparation, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0535.pdf
	Identifier	ZNB-1998-53b-0535
	Volume	53

215	Author	MikeR. Kopp, Bernhard Neumüller	Requires cookie*
	Title	Benzylgallium-Verbindungen. Die Kristallstrukturen von [Mg3Br2
	Abstract	,4Cl1,6(OEt2)6][Ga(CH2Ph)4]2 • 0,5 Toluol und [(3,5-Me2C6H3CH2)2GaBr]2 Benzylgallium Compounds. The Crystal Structures of [Mg3Br2 4C1 j 6(OEt2)6][Ga(CH2Ph)4]2 • 0.5 Toluene and [(3,5-Me2C6H3CH2)2GaBr]2 [Mg3Br2 4C1] 6(OEt2)6][Ga(CH2Ph)4]2-0.5 toluene (1) can be obtained by the reaction of one equivalent of GaCl3 with four equivalents of PhCH2MgBr in Et20 . Recrystallization of the crude product from toluene at 60°C gives colorless crystals of 1. Treatment of GaCl3 with two equivalents 3,5-Me2C6H3CH2MgBr in Et20 gives after recrystallization from toluene the diorganogallium bromide [(3,5-Me2C6H3CH2)2GaBr]2 (2). 1 and 2 were characterized by NMR, IR and MS techniques as well as by X-ray structure analyses. 1 consists in the dication [Mg3Br2 4C1, 6(OEt2)6]2+, two gallate units [Ga(CH2Ph)4]_ and a toluene molecule, disordered around a center of inversion. 2 forms centrosymmetric dimers [(3,5-Me2C6H3CH2)2GaBr]2.
	Reference	Z. Naturforsch. 53b, 545—551 (1998); eingegangen am 5. Februar 1998
	Published	1998
	Keywords	Gallium Compounds, Magnesium Compound, Crystal Structures
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0545.pdf
	Identifier	ZNB-1998-53b-0545
	Volume	53

216	Author	V. Erena, M.T T Hiede, W. Olfgang, Jeitschko	Requires cookie*
	Title	Ternary Intermetallic Compounds L«Mn2Ali0 (Ln = Y, La-Nd, Sm, Gd-Dy) and L«Re2Al10 (Ln = Ce, Pr, Sm) with CaCr2Al10-Type Structure
	Abstract	The twelve title compounds have been prepared for the first time. Their CaCnA lio-type structure (PA/nm m, Z = 4) was refined from single-crystal X-ray data for the three representatives TbM mAlio (a = 1274.3(2) pm, c = 511.4(2) pm, R = 0.025 for 680 structure factors F and 43 variable parameters VO, CeRe2Alio (a -1295.5(5) pm, c -517.2(4) pm, R = 0.054 for 810 F a n d 46 V), and SmReaAlio (a = 1291.5(2) pm, c = 516.5(1) pm, R = 0.021 for 622 F and 46 V). The atomic positions of the lanthanoid and transition metal atoms are fully occupied. Significant deviations from the full occupancies were observed for two aluminum sites in TbM mAlio and for all five aluminum sites of the two rhenium-containing compounds, resulting in the compositions TbMn2Al9.63(2), CeRe2Al9.52(8), and SmRe2Al9.i6< 9)-The cell volume of CeRe2Alio and to a smaller extent also that of CeMm A1 io indicate mixed or intermediate +III/+IV valencies of the cerium atoms in these compounds. The structural relationships between the three closely related body-centered tetragonal structures of ThM ni2, CeMn-iAlx, DyFeöAU, and the primitive tetragonal structure of CaCnA lio are briefly discussed.
	Reference	Z. Naturforsch. 53b, 673—678 (1998); received February 2 1998
	Published	1998
	Keywords	Intermetallic Compounds, Crystal Structure, X-Ray Data
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0673.pdf
	Identifier	ZNB-1998-53b-0673
	Volume	53

217	Author	Francoanellite K^alschpo^cpo, Stefan Dicka, Thomas Zeiskeb	Requires cookie*
	Title	Francoanellit K3A15HP04)6(P04)2*12H20: Struktur und Synthese durch topochemische Entwässerung von Taranakit-I 2 H2O: Structure and Synthesis by Topochemical Dehydration of Taranakite
	Abstract	Single crystals of synthetic francoanellite K3Al5(HP0 4)6(P0 4)2-12H20 could be obtained for the first time by topochemical dehydration of taranakite crystals. An X-ray structure de termination showed francoanellite to be the mineral with the second longest crystallographic axis described hitherto. Crystal data: space group R3c, a = 869.0(2), c = 8227(1)pm, Z = 6 , R g = 0.042. Francoanellite is a layer structure mineral having six layers of composition [K3Al5(HP04)6(P04)2(H2 0)i2], connected by hydrogen bonds. The rigid layer is formed by columns of corner sharing hydrogen phosphate tetrahedra and AIOö-octahedra which are inter connected by additional six-coordinated A1 ions. In trigonal holes of the layer orthophosphate ions are situated. The structure of francoanellite is very similar to the structure of taranakite K3H6Al5(P04)8-18H20 which has planar water interlayers between the Al-phosphate layers. A neutron scattering experiment with subsequent Rietveld refinement of the powder pattern gave the H-atom positions. Hydrogen bonds in francoanellite are formed within the rigid layers and between them. During the reaction taranakite —► francoanellite crystals in an intermediate stage of dehy dration could be obtained. From the c-axis of 8858 pm and one-dimensional electron density projections it can be proposed that in these crystals every second water interlayer was lost and a first order staging product of the deintercalation of water from taranakite was formed.
	Reference	Z. Naturforsch. 53b, 711—719 (1998); eingegangen am 2. März 1998
	Published	1998
	Keywords	Crystal Structure, Neutron Scattering, Francoanellite, Taranakite, Topochemical Reaction
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0711.pdf
	Identifier	ZNB-1998-53b-0711
	Volume	53

218	Author	Andreas Mommertz, Roland Leo, Werner Massa, Kurt Dehnicke	Requires cookie*
	Title	Uber die Reaktion von Bis(f-butylamino)dimethylsilan mit Titantetrachlorid. Kristallstrukturen des Imido-Komplexes [TiCl2 (N-CMe3 )(H2 N-CMe3 )(CH3CN)]2 und des Ketimido-Komplexes [TiCl3 {NC(Me)N(H)CMe3}(CH3CN)2 ]
	Abstract	On the Reaction of Bis(f-butylamino)dimethylsilane with Titanium Tetrachloride. Crystal Structures of the Imido Complex [TiCl->(N-CMe3)(H-,N-CMe3)(CH3CN)]2 and of the Ketimido Complex [TiCl3{NC(Me)N(H)CMe3}(CH3CN)2] The reaction of bis(f-butylamino)dimethylsilane with titanium tetrachloride in dichloro methane solution leads to a mixture of compounds from which the imido complex (H3N-CMe3)2[TiCl3(N-CMe3)]2 (1) and by extraction of the residue with acetonitrile the imido complex [TiCl2(N-CMe3)(H2N-CMe3)(CH3CN)]2 (2) can be isolated. 1 reacts with acetonitrile to give the ketimido complex [TiCl3{NC(Me)N(H)CMe3}(CH3CN)2] (3). According to crystal structure determinations 2 consists of centrosymmetric dimeric molecules containing TiCl2Ti bridges, the N-CMe3~ ligands being in equatorial positions with TiN bond lengths of 168.8(4) pm which corresponds to double bonds. In the monomeric complex 3 the chloro ligands are in meridional positions of the distorted octahedrally coordinated titanium atom with a TiN bond length of 175.7(2) pm of the ketimido ligand.
	Reference	Z. Naturforsch. 53b, 887—892 (1998); eingegangen am 27. April 1998
	Published	1998
	Keywords	Titanium, Imido Complex, Ketimido Complex, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0887.pdf
	Identifier	ZNB-1998-53b-0887
	Volume	53

219	Author	Werner Urland, Helmut Person	Requires cookie*
	Title	Zur Kristallstruktur von Ho2Se3 On the Crystal Structure of Ho2Se3
	Abstract	Starting from HoSe2_ t powder and holmium metal bright brownish-yellow, plate-like single crystals of Ho2Se3 could be prepared by chemical transport with A1C13. Holmium sesquiselenide crystallizes in the Sc2S3-type structure, space group Fddd, with lattice constants a = 1140,7(2), b -812,6(1) and c = 2423,9(3) pm.
	Reference	Z. Naturforsch. 53b, 900—902 (1998); eingegangen am 9. April 1998
	Published	1998
	Keywords	Holmium Sesquiselenide, Chemical Transport, Crystal Structure
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	Identifier	ZNB-1998-53b-0900
	Volume	53

220	Author	Isabel Díaza, Vicente Fernández, José Luis, M. Artínezb, Lothar Beyer0, Astrid Pilzd, Ulrich Müllerd	Requires cookie*
	Title	Thermochrome Chloro-und Bromocuprate
	Abstract	[C(NH2)3]2[CuBr4], (H3CC2N2SNH3)2[Cu2Br6], (C7N3H14)2[CuC14], (C7N3H14)2[CuBr4], [(Cl, Br)C3N2H6][CuCl3OH2] und (BrC3N2H6)2[CuBr4] Thermochromic Chloro-and Bromocuprates: [C(NH2)3]2CuBr4, (H3CC2N9SNH3)2[Cu2Br6], (C7N 3H 14)2[CuC14], (C7N3H 14)2[CuBr4], [(Cl, Br)C3N2H6][CuCl3OH2] and (BrC3N2H6)2[CuBr4] CuCl2 and CuBr2 were reacted in water-ethanol solutions containing HC1 or HBr, re spectively, with the following organic bases or their chlorides or bromides: guanidine (1), 2-amino-5-methyl-l,3,4-thiadiazol (2), hexahydro-2//-pyrimidine-(1,2A)-pyrimidine (3), and 2-hydrazino-2-imidazoline (4). With 1 and 3 the tetrahalocuprates (lH)2[CuBr4], (3H)2[CuCl4] and (3H)2[CuBr4] were obtained having flattened tetrahedral anions. 2 and CuBr2 form (2H)2[Cu2Br6], with nearly planar [Cu2Br6]2-ions that are associated to chains with square-pyramidal coordination of Cu. 2 and CuCl2 yield the hydrate (2H)C1H20 . 4 undergoes substitution of the hydrazine group for halogen, yielding the 2-halo-2-imidazolinium salts (5H)0 2(6H)o,8[CuCl3OH2] and (6H)2[CuBr4] in addition to [H3NCH2CH2NH3][CuCl4] (5 = 2-chloro-, 6 = 2-bromo-2-imidazoline). The planar [CuCl3(OH2)]_ ions are associated to chains. Crystal structure determinations were performed with (lH)2[CuBr4], (2H)2[Cu2Br6], (3H)2[CuCl4], (5H)0 2(6H)o 8[CuCl3OH2] and (6H)2[CuBr4]; the latter three at 298 K and at 166 K or 173 K. The known crystal structure of [H3N(CH2)2NH3][CuCl4] was redetermined at 166 K. In all cases small differences of bond lengths and bond angles are observed between room temperature and low temperature. The magnetic properties and electrospray mass spectra were measured. The products show thermochromic behavior.
	Reference	Z. Naturforsch. 53b, 933—938 (1998); eingegangen am 6. Mai 1998
	Published	1998
	Keywords	Chloro Cuprates, Bromo Cuprates, Crystal Structures, Thermochromism
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	Identifier	ZNB-1998-53b-0933
	Volume	53

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