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21	Author	Wolfgang Saak, Siegfried Pohl	Requires cookie*
	Title
	Abstract	Fe 4 S 4 I 2 (SPPh 3) 2 (1) was prepared by the reaction of Fe(THF) 6 Fe 4 S 4 I 4 (THF = C 4 H 8 0). SPPh,. and sulfur in toluene and CH 2 C1 2 . 1 has a lower stability than Fe 4 S 4 I 4 2_ and decomposes in solvents like THF and CH,CN. The crystal structure of 1 was determined from single crystal X-ray diffraction data. The compound crystallizes in the triclinic space group PI with a = 1025.5(1). b = 1082.4(1), c = 2135.5(3) pm. a = 89.82(1).ß -77.37(1), y = 73.56(1)°. V = 2214.1x10" pm'and Z = 2. The [Fe 4 S 4 ] 2+ core of 1 exhibits a slight tetragonal distortion. The mean Fe —S and Fe —Fe distances were found to be 227.6 (225.8-228.7) pm and 273.3 (272.9-274.4) pm, respectively. The Fe-SPPh, distances (231.6 and 232.1 pm) are longer than the terminal Fe — S bonds in RS coordinated [Fe 4 S 4 ] clusters. The Fe —I bonds are found at 251.6 and 251.8 pm. respectively.
	Reference	Z. Naturforsch. 43b, 813—817 (1988); eingegangen am 15. Februar 1988
	Published	1988
	Keywords	Neutral, Mixed Terminal Ligand Iron-Sulfur Cluster, Synthesis, Crystal Structure
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	Identifier	ZNB-1988-43b-0813
	Volume	43

22	Author	Roland Boese, Dieter Bläser, Wolfgang Petz	Requires cookie*
	Title	[Fe(C0)
	Abstract	4 C(0)NMe 2 ][C(NMe 2)3]; die erste Strukturbestimmung einer Organometallverbindung mit dem Carbeniumion [C(NMe 2) 3 ] + [Fe(C0) 4 C(0)NMe 2 ][C(NMe 2) 3 ]; the First Structure Determination on an Organometallic Compound with the Carbenium Ion [C(NMe 2) 3 ] + The crystal structure of the carbamoyl complex [(C0) 4 FeC(0)NMe 2 ][C(NMe 2) 3 ] (1) is de-scribed. It crystallizes in the triclinic space group PI (a = 7.876(3), b = 10.098(3), c = 12.067(5)Ä, a = 94.25(3), ß = 90.94(3), y = 97.30(3)°, Z = 2) and consists of independent ions. The cation has a planar CN 3 array with sp 2 hybridized C and N atoms. The carbamoyl group of the anion occupies an axial position in the trigonal bipyramidal environment of the iron atom.
	Reference	Z. Naturforsch. 43b, 945—948 (1988); eingegangen am 26. Februar/14. April 1988
	Published	1988
	Keywords	Crystal Structure, Iron Complex, Carbamoyl Complex, Guanidinium Cation
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	Identifier	ZNB-1988-43b-0945
	Volume	43

23	Author	HerbertW. Roesky, Jürgen Schimkowiak, Mathias Noltemeyer, GeorgeM. Sheldrick	Requires cookie*
	Title	Über die Reaktion von Dicyan mit Cd(II)-Ionen Röntgenstrukturanalyse von [Cd{(CN)2} 2 S0 2 ][AsF 6 ] 2 The Reaction of Cyanogen with Cd(II) Ions X-Ray Structure Analysis of [Cd{(CN) 2 } 2 S0 2 ][AsF 6 ] 2
	Abstract	Cd[AsF 6 ] 2 (1) reacts with cyanogen to yield [Cd{(CN) 2 } 2 S0 2 ][AsF 6 ] 2 (2). 2 crystallizes in the space group Pnma with cell constants a = 1475.2(3); b = 821.7(3); c = 1321.2(9) pm. The coordination sphere of cadmium consists of nine atoms (one oxygen, four fluorines and four nitrogens). Cyanogen forms polymeric links.
	Reference	Z. Naturforsch. 43b, 949—951 (1988); eingegangen am 10. März 1988
	Published	1988
	Keywords	Crystal Structure, Metal Complexes, Liquid Sulfur Dioxide, Cyanogen
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	Identifier	ZNB-1988-43b-0949
	Volume	43

24	Author	Otto Mündt, Heinz Riffel, Gerd Becker, Arndt Simon	Requires cookie*
	Title	Element—Element-Bindungen, IV [1] Molekül-und Kristallstruktur des Tetramethyldiphosphans und -diarsans Element—Element Bonds, IV [1] Molecular and Crystal Structure of Tetramethyldiphosphane and -diarsane
	Abstract	The molecular and crystal structures of the isotypic compounds tetramethyldiphosphane 1 and -diarsane 2 have been determined by single crystal X-ray diffraction (monoclinic; C2/m; Z = 2; 1/2: -155/-144 °C\a = 540.6(2)/555.8(2); b = 1131.0(6)/l 136.7(6); c -602.5(2)/612.8(2) pm;/? = 97.31(3)/95.24(3)°;P-P 221.2(1)/As-As 242.9(1) pm). In accordance with the crystallographically imposed symmetry 2/m, the molecules adopt antiperiplanar conformation. Their crystal structures are closely related to those of the homologues tetramethyldistibane 3 [1] and -dibismuthane 4 [3]. As found for the latter compounds, the E —E units (E = P, As) are also aligned in linear chains, but the intermolecular E---E contacts (P-P 381/As---As 370 pm) do not allow any extended interaction between molecules, which otherwise would result in thermochromic effects.
	Reference	Z. Naturforsch. 43b, 952—958 (1988); eingegangen am 29. Februar 1988
	Published	1988
	Keywords	Tetramethyldiphosphane, Tetramethyldiarsane, Conformation, Molecular Structure, Crystal Structure
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	Identifier	ZNB-1988-43b-0952
	Volume	43

25	Author	Harald Burger, Karl Hensen, Peter Pickel	Requires cookie*
	Title	Aluminiumbromid-Pyridiniumbromid-Verbindung: Kristallstruktur Kristallstrukturbestimmung von [Tris(pyridinium)bromid]bis(tetrabromoaluminat(III)) Crystal Structure Determination of [Tris(pyridinium)bromide]bis(tetrabromoaluminate(III))
	Abstract	The compound [(PyH) 3 Br][AlBr 4 ] 2 is formed by melting stoichiometric amounts of AlBr/PyHBr in a ratio of 2:3. It crystallizes in the orthorhombic space group Pbca with lattice constants a = 1365.5(2), b = 1616.0(2), c = 2783.7(3) pm, Z = 8, D c = 2.21 g/cm 3 . The structure was solved from 2810 diffractometer measured intensities (Cu —K" radiation) and refined to /?".(F) = 0.071. The cation shows three pyridinium ions attached via N — H — Br hydrogen bonds to a central bromide ion. The N-Br distances are 321(1), 321(2) and 332(2) pm.
	Reference	Z. Naturforsch. 43b, 963—965 (1988); eingegangen am 11. März 1988
	Published	1988
	Keywords	Aluminiumbromide, Pyridiniumbromide, Addition Compound, Crystal Structure
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	Identifier	ZNB-1988-43b-0963
	Volume	43

26	Author	Rüdiger Kniep, Heinz Jürgen Beister, Dieter Wald	Requires cookie*
	Title	Polymorphie von Tellur(IV)-iodid Polymorphism of Tellurium(IV) Iodide
	Abstract	Idiomorphous crystals of five different polymorphic modifications (a—e) of Tel 4 are simultane-ously grown from solutions of Tel 4 and concentrated HI in methanol by evaporating the solvent at room temperature. (5-TeI 4 is the only stable phase at normal conditions. Phase transformations of a-, ß-, y-and £-TeI 4 to the final stage (5-TeI 4 take place by heating and run through discrete intermediates. The observed graduations lead to a sequence y-, ß-, a-,_e-TeI 4 which indicates "increasing metastability". The crystal structures of a-TeI 4 (trigonal; P3ml; a = 4.228(2), c — 6.684(6) A, Z = 0.5; D v = 5.10 g/cm 3), /3-TeI 4 (orthorhombic; Pn2,m; a = 6.888(2), b = 14.539(3), c = 16.753(4) Ä, Z = 8; D r = 5.03 g/cm 3) and y-TeI 4 (monoclinic; P2,/c; a = 11.199(4), b = 13.599(4), c = 22.158(6) Ä,/3 = 98.10(3)°, Z = 16; D, = 5.05 g/cm 3) are related to the known crystal structure of d-TeI 4 . a-TeI 4 ("Teo.s^") is an isotype of the 2H-CdI : structure with random distribution of Te over the Cd-positions. The crystal structures of ß-, y-and d-TeI 4 contain discrete tetrameric molecules "(TeI 4) 2 (Tel3 + I _)2" which are generated by ordered distributions of Te over 1/4 of the octahedral holes of a 2H-(ß) and a 4H-sequence (y, d) of the nearly close packed iodine layers. A nearly cubic close packing of Iodine atoms is observed in the crystal structure of £-TeI 4 (tetragonal; 14,/amd; a = 16.875(6), c -11.829(5) Ä, Z = 16; D v = 5.01 g/cm 3). The ordered distribution of Te in 1/4 of the octahedral holes leads to tetrameric molecules "(Tel 3 + I~) 4 " in a cubanelike arrangement which, thus far, has been observed only in the crystal structures of TeCl 4 and TeBr 4 . The Madelung Parts of Lattice Energies, MAPLE, of ß-, y-, d-and £-TeI 4 are calculated.
	Reference	Z. Naturforsch. 43b, 966—980 (1988); eingegangen am 11. April 1988
	Published	1988
	Keywords	Polymorphism, Crystal Structures, Binary Compounds, Tellurium(IV) Iodide
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	Identifier	ZNB-1988-43b-0966
	Volume	43

27	Author	Andre Du Bois, Walter Abriel	Requires cookie*
	Title	Zur Stereochemie des freien Elektronenpaares in AX 6 E-Systemen, VIII* Statisch verzerrte Anionen in [H 3 N(CH2)3NH3]3(BiX 6 ) 2 (H 2 0) 2 mit X = Cl, Br On the Stereochemistry of the Lone-Pair Electrons in AX 6 E-Systems, VIII Statically Distorted Anion in [H 3 N(CH 2 )3NH 3 ]3(BiX 6 ) 2 (H 2 0) 2 with X = Cl, Br
	Abstract	Using 293 K diffractometer intensity data, the crystal structures of fH 1 N(CH 2) 3 NH 3 ] 3 (BiX 6) 2 (H 2 0) 2 with X -Cl, Br have been determined by single crystal X-ray technique and refined to a final R w of 0.027 and 0.043, respectively. The structures are isotypic, space group P2,/c, Z = 2 with a = 14.415(1). b = 9.7401(7), c = 12.4609(9)Ä, ß = 105.997(8)°for X — Cl and a = 14.794(2), b = 10.127(2), c = 12.853(2)Ä, ß = 105.68(2)° for X -Br. Statically distorted BiX,, 3_ -octahedra confirm the symmetry rules for the stereochemistry of the lone pair electrons in AX ft E-systems. Basic structural data for all compounds containing BiX 6 3_ and SbX h 3
	Reference	Z. Naturforsch. 43b, 1003—1009 (1988); eingegangen am 22. Februar 1988
	Published	1988
	Keywords	Lone Pair Electrons, Bismutates, Crystal Structure
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	Identifier	ZNB-1988-43b-1003
	Volume	43

28	Author	Wolfgang Blase, Gerhard Cordier	Requires cookie*
	Title
	Abstract	NaGaSn, (trigonal; P3,12 (No. 151); a = 632.8(4), c = 617.0(3) pm, Z -1; d v = 5.33 g/cm 3) was grown from the melt. The crystal structure contains Ga and Sn atoms in a helical arrangement (six atoms per turn) along the c-axis direction. Interatomic bonding between neighbouring helices completes a distorted [2+2]-tetrahedral environment for every Ga/Sn position. The compound is classified in terms of the Zintl concept.
	Reference	Z. Naturforsch. 43b, 1017—1019 (1988); eingegangen am 28. März 1988
	Published	1988
	Keywords	Gallides, Stannides, Crystal Structure, Zintl-Phases
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	Identifier	ZNB-1988-43b-1017
	Volume	43

29	Author	M. Buckley, S. T. Bramwell, P. Day, W.T A Harrison	Requires cookie*
	Title	A
	Abstract	The crystal structure of potassium nickel arsenate. KNiAs0 4 has been determined by high resolution powder neutron diffraction at 30 K. The unit cell of KNiAs0 4 is rhombohedral. space group R3, with hexagonal cell constants, a = 4.97208(2) (Ä). c = 28.52606(10) (Ä). The com-pound is isomorphous with NaNiAs0 4 .
	Reference	Z. Naturforsch. 43b, 1053—1055 (1988); received February 23. 1988
	Published	1988
	Keywords	Powder Neutron Diffraction, Crystal Structure, Potassium Nickel Arsenate
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	Identifier	ZNB-1988-43b-1053
	Volume	43

30	Author	Fritjof Schmock, Aida El-Kholi, Ulrich Müller, Kurt Dehnicke	Requires cookie*
	Title	Synthesis and Crystal Structure of PPh 3 Me[HS0 4 ]
	Abstract	PPh 3 Me[HS0 4 ] was prepared by the reaction of (PPh,Me)I with silver sulfate in aqueous solution. OPPh : Me and benzene being the by-products. The title compound was characterized by its IR spectrum as well as by an X-ray structure determination (1730 observed independent reflexions, R = 0.043). Crys-tal data: a = 910.4(3). b = 1587.8(4), c = 1294.2(6) pm, ß = 105.52(3)°. space group P2,/c t Z = 4. The structure consists of PPh,Me® cations and of HOSO, 0 ions that are associated via strong hydrogen bonds to dimeric centrosymmetric units.
	Reference	Z. Naturforsch. 43b, 1069—1071 (1988); eingegangen am 13. April 1988
	Published	1988
	Keywords	Triphenylmethylphosphonium Hydrogensulfate, Synthesis, IR Spectra, Crystal Structure
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	Identifier	ZNB-1988-43b-1069_n
	Volume	43

31	Author	W. Meske, D. Babel	Requires cookie*
	Title	Kristallstrukturen von Octacyanomolybdaten(IV), I Ag 4 (NH 3 ) 5 Mo(CN) 8 * 1,5 H 2 0 Crystal Structures of Octacyanomolybdates(IV), I Ag 4 (NH 3 ) 5 Mo(CN) 8 -l,5H 2 0
	Abstract	The crystal structure of the triclinic compound Ag4(NH 3) 5 Mo(CN) 8 -l,5H^O could be refined in space group PI (at T = 179 K: a = 974.6, b = 1477.6, c = 775.5 pm, a =102.5, ß = 94.6, y = 81.5°, Z = 2. Rg = 0.044 for 2744 independent reflections). The [Mo(CN) 8 ] 4 ~-groups form distorted square antiprisms with mean distances Mo—C = 215.7, C—N = 115.1 pm. They are connected to a puckered layer via four of their nitrogen ends which are tetrahedrally coordinated to silver (Ag—N = 226.7 pm). In between these layers and more or less tightly coordinated to their free cyano-N atoms dumbbells [CNAgNH 3 ] and [Ag(NH 3) 2 ] + are embedded. Their variation of distances and angles (Ag—N: 213 ... 216 pm, N —Ag-N: 150 ... 174°) is discussed.
	Reference	Z. Naturforsch. 43b, 1167—1173 (1988); eingegangen am 20. April 1988
	Published	1988
	Keywords	Crystal Structure, Octacyanomolybdate, Silver-Nitrogen Coordination
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	Identifier	ZNB-1988-43b-1167
	Volume	43

32	Author	Gerhard Thiele, Dietmar Putzas	Requires cookie*
	Title	Antiprismatische und dodekaedrische Oktaaquokationen von Calcium und Strontium in den Kristallstrukturen von Tetrahalogenocadmaten und -mercuraten Antiprismatic and Dodecahedral Oktaaquo Cations of Calcium and Strontium in the Crystal Structures of Tetrahalogeno Cadmates and Mercurates
	Abstract	The tetrahalogenometallates CaHgBr 4 -8H 2 0, CaCdI 4 -8H 2 0 and SrCdI 4 -8H 2 0 which have been obtained by crystallization from aqueous solutions form different structures. The orthorhombic compounds CaHgBr 4 -8H^O (Cmca, a — 1720.1(6) pm, b = 1329.2(4) pm. c = 1369.5(7) pm, Z — 8, R -0.041) and SrCdI 4 -8H 2 0 (Pnma, a = 1404.6(2) pm, b = 1841.1(5) pm. c = 1420.6(3) pm, Z = 8, R = 0.037) are built up from dodecahedral [A(H 2 0) 8 ] cations (A = Ca, Sr) and tetrahedral MX 4 anions (M = Hg, Cd) which are cubic closed packed in a CuAu type structure. The tetragonal structure of CaCdI 4 -8H 2 0 (P4/nbm, a = 1268.14(13) pm, c = 536.96(35) pm. Z = 2, R = 0.034) contains antiprismatic [Ca(H 2 0) x ] 2+ cations and tetrahedral Cdl 4 anions, which form together a tetragonal primitive rod package.
	Reference	Z. Naturforsch. 43b, 1224—1234 (1988); eingegangen am 9. Juni 1988
	Published	1988
	Keywords	Crystal Structure, Hydrates, Cadmium Complexes, Mercury Complexes
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	Identifier	ZNB-1988-43b-1224
	Volume	43

33	Author	Gerhard Cordier	Requires cookie*
	Title	Darstellung und Kristallstruktur von Ca 5 Ga 2 N 4 Preparation and Crystal Structure of Ca 5 Ga 2 N 4
	Abstract	The crystal structure of Ca 5 Ga 2 N 4 (orthorhombic, space group Cmca, a = 487.3(2) pm, b = • 1110.5(3) pm, c = 1421.7(4) pm, Z = 4) contains infinite zig-zag chains of Ga atoms, which are in a tetrahedral coordination by two additional nitrogen atoms in terminal positions.
	Reference	Z. Naturforsch. 43b, 1253—1255 (1988); eingegangen am 3. Juni/18. Juli 1988
	Published	1988
	Keywords	Crystal Structure, X-Ray, Alkaline Earth Gallium Nitrides
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	Identifier	ZNB-1988-43b-1253
	Volume	43

34	Author	MervatEl Essawi, H. Gosmann, D. Fenske, F. Schmock, K. Dehnicke	Requires cookie*
	Title	Synthesen und Kristallstrukturen von [PPh 3 Me]N0 2 und [PPh 3 Me]HC0 2 H 2 0 Syntheses and Crystal Structures of [PPh 3 Me]N0 2 and [PPh 3 Me]HC0 2 H 2 0
	Abstract	Triphenylmethylphosphonium nitrite and formate have been prepared by the reaction of [PPh,Me]I with silver nitrite, and lead formate, respectively, in aqueous solutions. [PPh 3 Me]N0 2 (1) forms pale yellow crystals, and [PPh 3 Me]HC0 2 H 2 0 (2) forms white crystals. Both com-pounds are soluble in water, ethanol, and dichloromethane. In moist air 2 is hydrated to yield [PPh 3 Me]HC0 2 -2H 2 0 (3). The compounds were characterized by their IR spectra. 1 and 2 also by X-ray crystal structure determinations. [PPh 3 Me]NO-> (1): space group P2,/«, Z = 4, 2088 independent observed reflexions, R = 0.062. Lattice dimensions (20 °C): a = 914.7(3), b = 1887.5(9), c = 1080.0(4) pm, ß = 110.29(3)°. The compound consists of PPh,Me + ions and NO-," anions with bond lengths of 114.2(6) pm and a bond angle of 124.1(7)°. [PPh 3 Me]HCOi • H^O (2): space group P2,/n, Z = 4, 2973 independent observed reflexions, R = 0.069. Lattice dimensions (-20 °C): a = 931(2), b = 1558(3), c = 1281(2) pm, ß = 105.9(1)°. The compound consists of PPh 3 Me + ions and formate anions which form centrosymmetric dimeric units [HCOvftO]?" through hydrogen bridges of the water molecules. Bond lengths CO 122.4(4) and" 120.9(4) pm. bond angle OCO 129.9(4)°.
	Reference	Z. Naturforsch. 43b, 1279—1284 (1988); eingegangen am 27. Mai 1988
	Published	1988
	Keywords	Triphenylmethylphosphonium Nitrite and Formate, Synthesis, Crystal Structure
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	Identifier	ZNB-1988-43b-1279
	Volume	43

35	Author	WolfgangA. Herrmann, RolandA. Fischer, JosefK. Felixberger, RoccoA. Paciello, Pavlo Kiprof, Eberhardt Herdtweck	Requires cookie*
	Title	Organorheniumhalogenide: Synthesen, Strukturen und Reaktivität gegenüber Alkinen Organorhenium Halogenides: Synthesis, Structure and Reactivity upon Treatment with Alkynes
	Abstract	[dichloro(/<-chloro)(^-pentamethylcyclopentadienyI)rhenium(IV)]
	Reference	Z. Naturforsch. 43b, 1391—1404 (1988); eingegangen am 29. April 1988
	Published	1988
	Keywords	Organorhenium Halides, Synthesis, Crystal Structure, Reactivity Bis
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	Identifier	ZNB-1988-43b-1391
	Volume	43

36	Author	H. Schmidbaur, R. Nowak, B. Huber, G. Müller	Requires cookie*
	Title	Synthese
	Abstract	und Kristallstruktur von [(C 6 Et 6)(C 6 H 5 Me)GaGaCI 4 ] 1/2 (C 6 Et 6): Ein gemischter Bis(i/ 6 -aren)gallium(I)-Komplex Synthesis and Crystal Structure of [(C 6 Et 6)(C 6 H 5 Me)GaGaCl4] • 1/2 (C 6 Et 6): A Mixed Bis(^ 6 -arene)gallium(I) Complex Crystals obtained from solutions of hexaethylbenzene and anhydrous Ga[GaCl 4 ] in toluene on cooling have the stoichiometry [(C 6 Et 6)(C 6 H 5 Me)GaGaCl 4 ] • 1/2 C 6 Et 6 . a = 9.760(1), b = 21.447(2), c = 17.754(2) A. ß = 95.47(1)°; monoclinic. space group P2,/n. Z = 4. Each Ga(I) center is ?/ 6 -bonded to one molecule of hexaethylbenzene and to one molecule of toluene. The two rings form an angle of 38,8°. The remaining crystal hexaethylbenzene is situated between two complex units, which are related by an inversion center located in the center of the ring.
	Reference	Z. Naturforsch. 43b, 1447—1452 (1988); eingegangen am 27. Juli 1988
	Published	1988
	Keywords	Gallium(I) Arene Complex, Hexaethylbenzene, Crystal Structure
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	Identifier	ZNB-1988-43b-1447
	Volume	43

37	Author	Michael Wedler, W. Herbert, FrankT. Roesky, Edelmann, Ulrich Behrens	Requires cookie*
	Title	(T-Ferrocenyl-Komplexe der frühen Übergangsmetalle — Synthese und Struktur a-Ferrocenyl Complexes of the Early Transition Metals — Synthesis and Structure
	Abstract	Ferrocenyllithium, FcLi (1), reacts with (C 5 H 4 CH 3) 2 TiCl2, CpTiCl, and CpTiCl 3 to give the new (7-ferrocenyl complexes (C5H 4 CH 3) 2 TiFc 2 (2), CpTiFc, (3) and CpTi(Fc) 2 Cl (4), respectively. Treatment of CpZrCl 2 with FcLi yields the mono-substitution product CpZr(Fc)Cl (5), which has been characterized by an X-ray structure analysis. Compound 5 crystallizes in the monoclinic space group P2,/c (a = 1622.3(6), b = 995.0(2), c = 1664.3(6) pm; ß = 94.78(3)°; Z = 4). Due to the sterically demanding pentamethylcyclopentadienyl ligands 5 contains a long zirconium-carbon bond (231.4(8) pm) and the Cp rings of the ferrocenyl substituent are tilted by 10.2°. The syntheses of CpZrFc., (6), Cp*HfFc 3 (7) and Cp : VFc 2 (8) are also described.
	Reference	Z. Naturforsch. 43b, 1461—1467 (1988); eingegangen am 6. Mai 1988
	Published	1988
	Keywords	Ferrocene, Early Transition Metals, Crystal Structure
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	Identifier	ZNB-1988-43b-1461
	Volume	43

38	Author	Schaffrath, R. Gruehn	Requires cookie*
	Title	U
	Abstract	Single crystals of the new oxochlorotantalate Nd 7 , 1 Ta 8 0 2H Cl f , could be obtained only by chemical transport reactions (T 2 —» T,; T 2 — 1000 °C, T, = 900 °C) with mixtures of Cl 2 /TaCl 5 as transport agent. NdTa0 4 was chosen as the starting material. A direct preparative route to Nd 7 ,,Ta s 0 2x Cl(, from binary and ternary components, however, was not successful. Nd 7 33 Ta H Oi x Clf, crystallizes in the space group Cmmm with a = 10.3381(8) Ä, b = 18.865(1) A, c — 3.9152(3) A; Z = 1. The structure was refined to R — 4.42%, R w = 2.76%. Main building units are pairs of edge-sharing Ta0 6 -octahedra which are connected with threefold capped trigonal prisms around Nd. Especially remarkable is one Nd position with an occupation factor of 0.833. The relationship of this new structure type with Nd 2 Ta 2 0 7 Cl 2 is considered. Furthermore, we have measured the magnetic susceptibilities of both Nd-compounds in a temperature range from 3,6 to 251,3 K. The results are compared with calculated data.
	Reference	Z. Naturforsch. 43b, 1567—1574 (1988); eingegangen am 7. Juli 1988
	Published	1988
	Keywords	Oxochlorotantalates, Thermal Decomposition, Preparation, Chemical Transport Crystal Structure
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	Identifier	ZNB-1988-43b-1567
	Volume	43

39	Author	Abderraouf Khabou, Kurt Dehnicke, Kurt Findeisen, Farbenfabriken Bayer, Bayer-WerkD. Leverkusen, -5090 Leverkusen, Dieter Fenske	Requires cookie*
	Title	Molybdännitridtrichlorid-2,3,3-trichloracrylnitril, [M0NCI3 * NC-C 2 C1 3 ] 2 Synthese, IR-Spektrum und Kristallstruktur Molybdenumnitridetrichloride-2,3,3-trichloroacrylnitrile, [MONC1 3 * NC—C 2 C1 3 ] 2 Synthesis, IR Spectrum, and Crystal Structure
	Abstract	[MONC1 3 -NC —C 2 C1 3 ] 2 has been prepared by the reaction of MONC1 3 with trichloromethyl isocyanidedichloride, CC1 3 NCC1 2 , in CH 2 C1 2 suspension. The compound forms redbrown. mois-ture sensitive crystals, which were characterized by their IR spectrum as well as by a crystal structure determination (2482 independent observed reflexions, R = 0.048). Crystal data (-70 °C): Space group P2,/c, Z = 2, a = 674.2(2); b = 2128.2(11); c = 786.0(4) pm: ß = 102.81(3)°. [MONC1 3 • NC-C 2 C1 3 ] 2 forms centrosymmetric dimeric molecules via chloro bridges with Mo-Cl bond lengths of 240.7 and 276.0 pm. The longer MoCl bond of the MOC1 2 MO ring is caused by the trans influence of the nitride ligand; the MoN bond length of 167 pm corresponds with a triple bond. The 2,3,3-trichloroacrylnitrile ligand is bonded by its nitrogen atom with a bond length of Mo —N — 216 pm; the Mo-N=C—C sequence is almost linear with a remarkable short C—C bond of 143.0 pm.
	Reference	Z. Naturforsch. 43b, 1616—1620 (1988); eingegangen am 19. Juli 1988
	Published	1988
	Keywords	Molybdenumnitridetrichloride-233-trichloroacrylnitrile, Synthesis, IR Spectra, Crystal Structure
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	Identifier	ZNB-1988-43b-1616
	Volume	43

40	Author	Christina Ergezinger, Frank Weller, Kurt Dehnicke	Requires cookie*
	Title	Amidinatokomplexe von Bor, Aluminium, Gallium, Indium und Zinn Die Kristallstrukturen von Ph-C(NSiMe 3 ) 2 AICI 2 und Ph-C(NSiMe 3 ) 2 SnCl 3 Amidinato Complexes of Boron, Aluminium, Gallium, Indium, and Tin The Crystal Structures of Ph-C(NSiMe 3 ) 2 AlCl 2 and Ph-C(NSiMe 3 ) 2 SnCl 3
	Abstract	The trichlorides of aluminium, gallium, and indium, as well as boron tribromide and tin tetra-chloride react with N,N,N'-tris(trimethylsilyl)benzamidine to form the monomeric N.N'-bis-(trimethylsilyl)benzamidinato complexes Ph-C(NSiMe,) 2 MX 2 (M = B, Al. Ga, In; X = Cl, Br) and Ph —C(NSiMe 3) 2 SnCl 3 , respectively. All compounds have been characterized by their IR spectra, two of them by X-ray diffraction studies. Ph — C(NSiMei) 2 AlCl 2 : Space group C2/c, Z = 4, 1152 independent observed reflexions, R = 0.052. Lattice dimensions (19 °C): a = 1558.6(1), b = 1116.6(1), c = 1307.0(1) pm, ß = 115.17(1)°. The compound forms monomeric molecules, in which the aluminium atom is tetra-hedrally coordinated by two chlorine atoms and by the two nitrogen atoms of the benzamidinato chelate. Bond length A1N = 188.2 pm. Ph — C(NSiMe^) 2 SnCU: Space group PI, Z = 2, 3293 independent observed reflexions, R = 0.034. Lattice dimensions (19 °C): a = 980.1(1), b = 1025.9(1), c = 1230.5(2) pm. a = 68.40(1)°, ß = 87.71(1)°, y — 68.92(1)°. The compound forms monomeric molecules, in which the tin atom is five-coordinated by three chlorine atoms and by the two nitrogen atoms of the benzamidinato chelate. Bond lengths SnN = 213.5 and 215.2 pm.
	Reference	Z. Naturforsch. 43b, 1621—1627 (1988); eingegangen am 18. August 1988
	Published	1988
	Keywords	N, N'Bis-(trimethylsilyl)amidinato Complexes, Synthesis, IR Spectra Crystal Structure
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	Identifier	ZNB-1988-43b-1621
	Volume	43

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