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1	Author	H.-Jürgen Meyer, Joachim Pickardt	Requires cookie*
	Title	Die Kristallstruktur von Calciumhexacyanoferrat(II)- Hexamethylentetramin-Wasser(l/l/6) Ca 2 [Fe(CN) 6 ] * C 6 H 12 N 4 * 6 H 2 0 The Crystal Structure of Calciumhexacyanoferrate(II)- Hexamethylenetetramine-Water(l/l/6) Ca 2 [Fe(CN) 6 ] * C 6 H 12 N 4 * 6 H : 0
	Abstract	Ca 2 [Fe(CN) 6 ] • C t ,H 1 2N 4 -6H 2 0 crystallizes in the monoclinic space group B2lb with a = 1130,2(4), b = 1373,5(4), c = 1353,0(4) pm and y = 97,17°. The X-ray single crystal structure determination converged at R -0.055 (2057 reflections). Each of the four Fe(CN) 6 octahedra (Z = 4) in the unit cell is coordinated by six Ca atoms with mean N CY AN — Ca distances of 253.5(3) pm. The Ca atoms are bridged by hexamethylenetetramine and water molecules.
	Reference	Z. Naturforsch. 43b, 135—137 (1988); eingegangen am 31. Juli 1987
	Published	1988
	Keywords	Crystal Structure, Hexacyanoferrate, Hexamethylenetetramine
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	Identifier	ZNB-1988-43b-0135
	Volume	43

2	Author	Walter Abriel, Hartmut Ehrhardt	Requires cookie*
	Title	Über hexakoordinierte gemischte Halogeno-Anionen des Te(IV): Kristallographische und Raman-spektroskopische Untersuchungen an Rb 2 TeBr 3 , 5 Cl 2 , 5 On Hexacoordinated Mixed Halogeno Anions of Te(IV): Crystallographic and Raman Spectroscopic Investigation of Rb 2 TeBr 3 5 C1 2 5
	Abstract	The title compound contains the anions [TeBr 3 Cl 3 ] 2_ and [TeBr 4 Cl 2 ] 2_ in a 1:1 ratio. The corresponding point symmetries, detected by Raman spectroscopic methods, are 3 m and 4/mmm, respectively. The crystal structure analysis exhibits a random distribution of these anions: K 2 PtCl 6 -type, space group Fm3m with a = 10.4602(5) Ä and Z = 4, final R = 0.036 from 178 F n (MoKa). Einführung
	Reference	Z. Naturforsch. 43b, 557—560 (1988); eingegangen am 7. Januar 1988
	Published	1988
	Keywords	Tellurates, Crystal Structure, Raman Spectra
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	Identifier	ZNB-1988-43b-0557
	Volume	43

3	Author	Gabi Reber, Jürgen Riede, Gerhard Müller	Requires cookie*
	Title	Molecular Structure of (o-Trimethylsilyl- benzyl)diphenylphosphine
	Abstract	(o-Trimethylsilylbenzyl)diphenylphosphine (1) crystallizes in the monoclinic space group P2 Jn with a = 14.088(2), b = 8.712(1), c = 16.481(2)Ä, ß = 101.63(1)°, V -1981.3Ä\ Z = 4. There is no P-Si interaction in the solid state which is also found for the solution (31 P NMR, l3 C NMR).
	Reference	Z. Naturforsch. 43b, 915—917 (1988); eingegangen am 18. März 1988
	Published	1988
	Keywords	Benzyl-phosphines, Conformation, Crystal Structure
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	Identifier	ZNB-1988-43b-0915_n
	Volume	43

4	Author	HerbertW. Roesky, Michael Zimmer, Regine Herbst, GeorgeM. Sheldrick, Prof Heinz, G. Wagner	Requires cookie*
	Title	N,N'-Bis(diphenyIphosphino)-S,S-dimethylsulfodiimin — ein Ligand für cyclische Übergangsmetallkomplexe N,N'-Bis(diphenylphosphino)-S,S-dimethylsulfodiimine — a Ligand for Cyclic Transition Metal Complexes
	Abstract	Me 2 SN 2 P 2 Ph 4 M(CO) 4 complexes (1) (M: la Cr, lb Mo, lc W) have been synthesized from Me 2 S(NPPh 2) 2 and C 7 H s M(CO) 4 . la—lc are stable at room temperature, lb crystallizes in the space group P2,2,2 with cell constants a = 2486.3(2); b = 1488.8(1); c = 882.0(1) pm.
	Reference	Z. Naturforsch. 43b, 933—936 (1988); eingegangen am 26. Februar 1988
	Published	1988
	Keywords	Crystal Structure, Chromium, Molybdenum, Tungsten
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	Identifier	ZNB-1988-43b-0933
	Volume	43

5	Author	Siegfried Pohl, Rainer Lötz, Detlev Haase, Wolfgang Saak	Requires cookie*
	Title	Iodoantimonate der Zusammensetzung A + Sb 2 I 7 : Diskrete Anionen in (Me 4 N) 4 Sb 8 I 2 8 und (Me 3 S) 4 Sb 8 I 28 , polymere Ketten in (Me 3 NCH 2 Ph)Sb 2 I 7 (Me = CH 3 , Ph = C 6 H 5 ) Iodoantimonates of Composition A~Sb 2 I 7 ~: Discrete Anions in (Me 4 N) 4 Sb 8 I 28 and (Me 3 S) 4 Sb s I 28 , Polymerie Chains in (Me 3 NCH 2 Ph)Sb 2 I 7 (Me = CH 3 , Ph -C 6 H 5 )
	Abstract	The reaction of Sbl 3 with Me 4 NI, Me ? SI, and Me^NCH^Phl in acetonitrile (molar ratios 2:1) yields (Me 4 N) 4 Sb 8 I 28 (1). (Me,S) 4 Sb K I 28 (2). and (Me,NCH 2 Ph)Sb : I 7 (3), respectively. The struc-tures of 1—3 were determined from single crystal X-ray diffraction data. 1—3 crystallize in the monoclinic space group P2,/«. 2: a -1434.2(3). b -1484.1(4). c = 2102.6(4) pm. ß = 105.4(1)°, Z = 2. 1: a = 1441.7(1), b = 1545.1(1). c = 2117.3(1) pm. ß = 106.4(1)°, Z = 2. 3: a = 1004.4(1). b = 1378.8(1). c = 1899.3(2) pm. ß = 94.2(1)°. Z = 4. The structures of 1 and 2 are very similar and consist of isolated cations and anions. The Sb s I 28
	Reference	Z. Naturforsch. 43b, 1144—1150 (1988); eingegangen am 24. Mai 1988
	Published	1988
	Keywords	Iodoantimonates, Synthesis, Crystal Structure
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	Identifier	ZNB-1988-43b-1144
	Volume	43

6	Author	CarlD. Habben, Mathias Noltemeyer	Requires cookie*
	Title	Molekül-und Kristallstruktur
	Abstract	des l,l-Diethyl-3,5-dimethyl-lA 6 ,4,2,6,3,5-dithiadiazadiborins Molecular and Crystal Structure of l,l-Diethyl-3,5-dimethyl-H 6 ,4,2,6,3,5-dithiadiazadiborine The title compound, isolated from the reaction of SS-diethyl-N,N'-bistrimethylsilylsulfodiimide and 3.5-dimethyl-l,2,4-trithiadiborolane, crystallizes in space group Pbca with cell constants a — 1218.7(6), b = 1295.8(6), c = 1455.7(9) pm, V = 2.2987 nm 3 , Z = 8, Q — 1.167 MgirT 3 . The X-ray structure was refined to R = 0.053.
	Reference	Z. Naturforsch. 43b, 1683—1684 (1988); eingegangen am 11. August 1988
	Published	1988
	Keywords	Crystal Structure, Synthesis, Dithiadiazadiborines
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	Identifier	ZNB-1988-43b-1683_n
	Volume	43

7	Author	Na, Cufef, S. Kummer, W. Massa, D. Babel	Requires cookie*
	Title	Zur Struktur der Kupfer-Weberite Na 2 CuCrF 7 Concerning the Structures of the Copper Weberites Na 2 CuCrF 7 and Na 2 CuFeF 7
	Abstract	The crystal structure of the compound Na 2 CuCrF 7 (orthorhombic, a = 710.0, b = 1033.8, c = 751.8 pm, Z = 4) was refined in space group Pmnb to R (= 0.028 (1545 independent reflections). The Jahn-Teller distortion of the CuF 6 -octahedra (Cu-F = 191.1/193.8/212.4 pm. mean 199.1 pm) reduces the symmetry compared to the body-centered orthorhombic weberite type, to which it is otherwise closely related. The CrF 6 -octahedra. interconnecting parallel chains of CuF 6 -octahedra, are nearly undistorted (mean Cr-F = 190.6 pm). Na 2 CuFeF 7 exhibits a supercell with a different structure (monoclinic, a = 2468.7, b = 734.7, c = 1245.2 pm, ß = 99.29°, Z = 16). It may be interpreted as a new intermediate type between orthorhombic and trigonal weberites. Preliminary results obtained from refinement in space group A2/n (/? g = 0.076) are given and discussed (mean values Cu—F = 199 pm, Fe — F = 192 pm).
	Reference	Z. Naturforsch. 43b, 694—701 (1988); eingegangen am 9. Februar 1988
	Published	1988
	Keywords	Crystal Structure, Weberite, Copper Fluoro Compounds
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	Identifier	ZNB-1988-43b-0694
	Volume	43

8	Author	Ute Patt-Siebel, Helmut Thullen, Ulrich Müller, Kurt Dehnicke	Requires cookie*
	Title	Dichlorcyclopropenon als stabiler Komplexligand Die Kristallstruktur von [NbOCl 3 -OC 3 Cl 2 ] 4 Dichlorocyclopropenone as Stable Complex Ligand The Crystal Structure of [NbOCI 3 * OC 3 Cl 2 ] 4
	Abstract	The reaction of tetrachlorocyclopropene with NbOCl, yields NbCl 5 • OC 3 Cl 2 (1); 1 is also formed by partial hydrolysis of C 3 Cl 3 + NbCl 6 ~ (2), which is prepared from C 3 C1 4 and NbCl s . [NbOCl 3 • OC 3 Cl : ] 4 (3) was obtained by hydrolysis of 1 in form of pale-yellow, moisture sensitive, non-explosive crystals, and characterized by its IR spectrum and an X-ray crystal structure deter-mination (1871 independent observed reflexions, R = 0.048). Crystal data: space group P 1. Z = 2. a = 993.7(4), b = 1090.5(5). c = 1097.4(3) pm, a = 69.51(3), ß = 70.47(3), y = 66.51(4)° (at — 17 °C). 3 consists of centrosymmetrical tetramers; the four Nb atoms form a square and are linked via almost linear oxo groups with alternating short and long NbO bonds with mean bond lengths of 175 and 208 pm. In trans position of each of the short NbO bonds a dichlorocyclo-propenone molecule is attached via its oxygen atom with an NbO distance of 223 pm.
	Reference	Z. Naturforsch. 43b, 795—800 (1988); eingegangen am 10. Februar 1988
	Published	1988
	Keywords	Dichlorocyclopropenone-NbOCb Adduct, Synthesis IR Spectra, Crystal Structure
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	Identifier	ZNB-1988-43b-0795
	Volume	43

9	Author	PeterG. Jones, Ralf Scheibach, Einhard Schwarzmann, Carsten Thöne, Andreas Vielmäder	Requires cookie*
	Title	Darstellung und Kristallstruktur einiger Tetracarboxylatoaurate(III) Preparation and Crystal Structure of Some Tetracarboxylatoaurates(III)
	Abstract	Various salts M(AuX 4) 2 with X = OCOCH, or OCOC 2 H 5 have been prepared by two methods: (i) the reaction of metal hydroxides M(OH) 2 with HAuCl 4 , followed by treatment of the inter-mediate products with acetic or propionic acid, or (ii) the reaction of aurates M{Au(OH) 4 } 2 with the carboxylic acids. The crystal structure of Pb{Au(0C0CH 3) 4 } 2 -2H 2 0 shows that it is isostruc-tural to the strontium salt, consisting of molecular units Pb{Au(OCOCH 3) 4 } 2 with crystallo-graphic symmetry 2. The water of crystallization forms neither coordinate bonds to a metal nor hydrogen bonds. In the analogous zinc salt the water is coordinated to the zinc atom, and the structure is a layer polymer. The two compounds that crystallize in anhydrous form. Ba{Au(OCOCH 3) 4 } 2 and Pb{Au(OCOC 2 H s) 4 } 2 , have not yet yielded crystals suitable for X-ray analysis.
	Reference	Z. Naturforsch. 43b, 807—812 (1988); eingegangen am 3. März 1988
	Published	1988
	Keywords	Gold, Carboxylate, Alkaline Earths, Crystal Structure
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	Identifier	ZNB-1988-43b-0807
	Volume	43

10	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

11	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

12	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

13	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

14	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

15	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

16	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

17	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

18	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

19	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

20	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

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