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1	Author	SylviaM. Agull, Bernhard Neumüller, K. Urt Dehnicke	Requires cookie*
	Title	Synthese und Kristallstrukturen der Polyselenido-Mercurate (PPh4)2\|H g(Se4)2\| und \|Cs(18-Krone-6)\|2\|H g2(Se4)3l Syntheses and Crystal Structures of the Polyselenido M ercurates (PPh4)2[Hg(Se4)2] and [Cs(18-Crown-6)]2[Hg2(Se4)3]
	Abstract	(PPh4)2[Hg(Se4)J has been prepared by the reaction o f (PPh4)2[Sn(Se4)3] with H g(C H 3COO)2 in dimethylformamide (D M F) solution. [Cs(18-crown-6)]2[Hg2(Se4)3] has been prepared by the reaction o f a lithium polyselenide solution in D M F with H g(C H 3COO)2 in the presence o f CsBr and 18-crown-6. Both com pounds are obtained as dark red crystals and characterized by X-ray structure determinations. (PPh4) 2[H g(Se4) 2]: Space group P 2,/c, Z = 4, 3021 observed unique reflexions, R = 0.082. Lattice dim ensions at 20 °C: a = 1046.0(3), b = 2129.4(2), c = 2213.1(3) pm,/? = 97.62(2)°. The com pound consists o f PPh4+ ions and anions [Hg(Se4)2]2", in which the mercury atom is a spi-rocenter o f puckered HgSe4 rings. [ Cs(18-crown-6) J2[H g2(Se4)3J: Space group la, Z = 4, 2859 observed unique reflexions, R = 0.074. Lattice dimensions at 20 °C: a = 2018(1), b = 1097.0(2), c = 2317.1(5) pm, ß = 99.40(3)°. The compound forms an ion triple which originates from Cs-Se contacts o f 382 to 390 pm with the [Hg2(Se4)3]2~ ion. The latter can be described as a [FlgtSe^JJ2-ion, which has contacts with a HgSe4 fragment.
	Reference	Z. Naturforsch. 46b, 985—9 (1991); eingegangen am 12. Dezember 1990
	Published	1991
	Keywords	Polyselenido Mercurates, Synthesis, Crystal Structure
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	Identifier	ZNB-1991-46b-0985
	Volume	46

2	Author	Bernhard Neumüller	Requires cookie*
	Title	Darstellung und Kristallstruktur von [(Me3Si)2CH(7-Pr)InCll2 Synthesis and Crystal Structure o f [(Me3Si)2CH(/-Pr)InCl]2
	Abstract	The title com pound 1 has been prepared by the reaction o f z-PrlnCl, with LiC H (SiM e3)2 in diethylether at -3 0 °C. The colorless substance 1 was characterized by N M R , IR, and RE spectroscopy, as well as by mass spectrometry. 1 is dimer in solution and the solid state and crystallizes in the space group P 2 ,/c with the cell parameters a = 1206.4(3) pm, b = 905.7(2) pm, c = 1591.2(5) pm, and ß = 101.18(2)°. The unit cell contains two centrosymmetri-cal dimeric molecules.
	Reference	Z. Naturforsch. 46b, 1539—1543 (1991); eingegangen am 12. April 1991
	Published	1991
	Keywords	Diorganoindiumchloride, Synthesis, Crystal Structure
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	Identifier	ZNB-1991-46b-1539
	Volume	46

3	Author	Jürgen Silberzahn, Hans Pritzkow, HansPeter Latscha	Requires cookie*
	Title	Synthese und Kristallstruktur eines l(A5),4(A5)-Diphosphaazulens sowie dreier 1 -Phospha-1,6a-dihy dropentalene Synthesis and Crystal Structure o f a l(/l5),4(^5)-Diphosphaazulene and of Three 1 -Phospha-1,6a-dihydropentalenes
	Abstract	The reaction o f acetylene-bis(phosphonous-bisdimethylamide) (1) with tetraphenyl-cyclo-pentadienone (2) yields a 1-phospha-1,6a-dihydropentalene (4), which can be sulfurized with CS2 to give the 1-thio-compound 5, and oxidized with H 20 2 to give the 1-oxo-compound 6. With dim ethyl-acetylenedicarboxylate (7) an amazingly stable l (/ 5),4(A5)-diphosphapen-talene (8) is generated, which reacts further with 7 to yield a l(/.5),4 (/5)-diphosphaazulene (9). The preparation o f the new molecules 4, 5, 6, 9 and the crystal structures o f 5 and 9 are reported.
	Reference	Z. Naturforsch. 46b, 197—201 (1991); eingegangen am 15. Juni 1990
	Published	1991
	Keywords	Phosphororganic Azulene and Dihydropentalenes, Synthesis, Crystal Structure
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	Identifier	ZNB-1991-46b-0197
	Volume	46

4	Author	Frank Weller, Irene Pauls, K. Urt Dehnicke, Gerd Becker	Requires cookie*
	Title	Die
	Abstract	Reaktionen von Wolframhexachlorid mit überschüssigem 2,2-Dimethylpropylidinphosphan; die Kristallstrukturen von WC15P2(C5H9)3, WC14P5(C5H 9)s und \|C3(C4H9)3\| +\|WC1S(C4H9C -C C 4H9)\|-The Reactions of Tungsten Hexachloride with Excess 2,2-Dimethylpropylidynephosphane; the Crystal Structures of WC15P2(C5H9)3, WC14P5(C5H 9)5, and [C3(C4H9)3]+[WC15(C4H9C = C C 4H 9)]- The reaction of tungsten hexachloride with excess 2,2-dimethylpropylidynephosphane, C4H9-C = P , leads to the tungsten phosphaalkyne clusters WC15P2(C5H9)3 and WC14P5(C5H9)5, as well as to the tris(/'-butyl)cyclopropenium pentachloro tungsten alkyne complex [C3(C4H9)3]+[WC15(C4H9C=CC4H9)]-. All complexes were characterized by X-ray structure determinations. WC15P2(C5H9)3: Space group P 2,/«, Z = 8, 4653 observed unique reflexions, R = 0.033. Lat tice dimensions at 20 C: a = 1577.8(2), b = 1661.3(1), c = 1869.8(2) pm, ß = 110.64(1)°. The compound has a molecular structure, in which the tungsten atom is surrounded by three chlo rine atoms, three carbon atoms with W -C distances of 182, 230, and 231 pm. and by one phosphorus atom with W -P = 246 pm. WC14P5(C5H9)5: Space group P2,/c, Z = 4, 3517 observed unique reflexions, R = 0.043. Lat tice dimensions at 20 °C: a = 1770.0(2), b = 1032.9(2), c = 1876.0(3) pm, ß = 102.86(1)°. The complex has a molecular structure, in which the tungsten atom is surrounded by two chlorine atoms, two carbon atoms with W -C distances of 189 and 215 pm, as well as by four phospho rus atoms with W -P distances of 242, 250, 264, and 268 pm. [C3(C4H9)3]*[WC15(C4H9C=CC4H9)] : Space group P2l/c', Z = 4, 3284 observed unique re flexions, R = 0.052. Lattice dimensions at 20 °C: a = 941.5(3), b = 1762.2(6), c = 1903.5(7) pm, ß = 92.27(3)°. The compound consists of tris(/-butyl)cyclopropenium ions, and anions [WC15(C4H9C=CC4H9)]_, in which the bis(r-butyl)alkyne ligand is coordinated side-on, corre sponding to a cyclopropene type structure with W -C distances of 198 pm.
	Reference	Z. Naturforsch. 46b, 519—529 (1991); eingegangen am 8. November 1990
	Published	1991
	Keywords	Phosphaalkyne Clusters of Tungsten, Syntheses, Crystal Structure
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	Identifier	ZNB-1991-46b-0519
	Volume	46

5	Author	Dirk Adam, Bernhard Herrschaft, Hans Hartl	Requires cookie*
	Title	Synthese und Strukturuntersuchungen von Iodocupraten(I) XIV. Iodocuprate(I) mit /f-(7-gebundenen Kationen [1] Synthesis and Structure Investigations of Iodocuprates(I) XIV. Iodocuprates(I) with «-er-Bonded Cations [1]
	Abstract	Reactions o f Cul with N-methylpyrazinium iodide, (pyr)I, N-methyl-4,4'-bipyridinium iodide, (bp 4)1 and N-methyl-2,2'-bipyridinium iodide, (bp 2)1, in organic solvents led to three novel types o f copper(I) complexes o f stoichiometries (pyr)Cu2I3, (bp4)C u3I4 and (bp2)C u2I3. In all o f them the cations are n-a-bonded to copper(I) through donation o f their unshared electron pairs. (pyr)Cu2I3 crystallizes with an ionic structure (trigonal, R 3 c , hexagonal axes a -3053(2), c = 671.9(3) pm, Z = 18). Polymeric cations i[((pyr)C uI3/3)3]3+ and anions i[C u I4/2]-form parallel rod packings. The structure m otif o f the cations can be described as a columnar part o f the ß-Cu\ structure in which the copper and iodine atom s are also arranged to Cu3I3 rings. The crystal structure o f (bp4)C u3I4 (triclinic, P I, a = 938.8(2), b = 980.0(4), c = 1070.1(3) pm, a = 73.56(3), ß = 75.79(2), y = 89.50(3)°, Z = 2) is built up by uncharged chains i[(C uI4/3)(CuI3 3I1/2)((bp4)C uI2/3I1;2)]. The trinuclear units (bp4)C u3I4 are connected via com mon iodide edges. The copper halide connection m otif o f the polymeric com pound has some features in com m on with the "stair" and "cube" structures o f adducts o f Cul with unidentate, neutral P-, As-or N-bases. The com pound (bp2)C u2I3 (m onoclinic, P 2 ,/«, a = 1054.0(2), b = 1034.8(3), c = 1512.6(3) pm, ß = 108.10(2)°, Z = 2) has a structure, in which two edge-sharing (C ul4,2)-tetra-hedra and two approximately planar (C u l2/2(bp2))-units form tetranuclear molecules (bp2)2Cu4I6. These are linked to chains with a "stair" m otif by intermolecular Cu • • • I contacts.
	Reference	Z. Naturforsch. 46b, 738—7 (1991); eingegangen am 16. N ovem ber 1990
	Published	1991
	Keywords	Iodocuprates(I), Cationic Ligands, Crystal Structure
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	Identifier	ZNB-1991-46b-0738
	Volume	46

6	Author	K.-J Range, U. Klement, G. Döll, E. Bucher, J. R. Baumann	Requires cookie*
	Title	The Crystal Structure of MnIn2Se4, a Ternary Layered Semiconductor
	Abstract	Single crystals o f M nIn2Se4 have been grown by the chemical vapour phase transport technique using A1C13 as the transporting agent. The struc ture was refined to R = 0.064, Rn = 0.059 for 609 reflections. MnIn-,Se4 (R 3 m , hexagonal axes
	Reference	Z. Naturforsch. 46b, 1122—1124 (1991); received February 21 1991
	Published	1991
	Keywords	M anganese Diindium Tetraselenide, Layered Semiconductor, Crystal Structure
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	Identifier	ZNB-1991-46b-1122_n
	Volume	46

7	Author	Rüdiger Staffel, Ulrich Müller, Andreas Ahle, K. Urt Dehnicke	Requires cookie*
	Title	Die Kristallstruktur von [Na(12-Krone-4)2+l2Se82 * (Se6, Se7) The Crystal Structure o f [Na(12-Crown-4)2+]2Se82 -(Se6, Se7)
	Abstract	The title com pound was prepared from sodium polyselenide and 12-crown-4 in D M F solution in the presence o f cerium(IlI)chloride in the form o f black needles. The crystal structure determination by X-ray diffraction shows a partially disordered structure, in which the anionic units Se82-■ Se7 and Se82- • Se6 are present in the ratio 0.72/0.28. These units are as sociated to layers parallel to (1 0 0); the layers alternate with pseudohexagonal layers o f [N a(12-crown-4)2]+ ions. Space group P i, Z = 2, 3903 observed unique reflections, R = 0.114, w R = 0.084. Lattice dim ensions at -6 5 °C: a = 1247.9(3), b = 1367.8(8), c = 1660(1) pm, a = 94.65(5), ß = 98.94(3), y = 91.10(3)°.
	Reference	Z. Naturforsch. 46b, 1287—1292 (1991); eingegangen am 8. April 1991
	Published	1991
	Keywords	Octaselenide, Cycloheptaselenium, Cyclohexaselenium, Synthesis, Crystal Structure
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	Identifier	ZNB-1991-46b-1287
	Volume	46

8	Author	Klaus-Jürgen Range, Franz Rau, Ulrich Klement	Requires cookie*
	Title	Hochdrucksynthese und Strukturverfeinerung von S r V 0 3, Sr2V 0 4 und Sr3V20 7 High-Pressure Synthesis and Structure Refinement of S rV 03, Sr2V 0 4, and Sr3V20 7
	Abstract	Single crystals o f S rV 0 3, Sr2V 0 4 and Sr3V20 7 have been obtained by high-pressure reactions in a m odified belt-type apparatus. The crystal structures, refined from diffractometer data, are as follows; S rV 03, perovskite type. Pm 3m, a = 3.8408(3) A, R = 0.017, /?w = 0.018, com posi tion from occupancy refinement o f oxygen positions SrV O ,93(2); Sr2V 0 4, K 2N iF 4 type, I 4/m m m , a = 3.837(1), c = 12.569(1) Ä, R = 0.014, R w = 0.017; Sr3V ,0 7, Sr3T i,0 7 type, I 4/m m m , a = 3.839(1), c = 20.262(2) Ä, R = 0.020, R w = 0.029.
	Reference	Z. Naturforsch. 46b, 1315—1318 (1991); eingegangen am 10. Mai 1991
	Published	1991
	Keywords	Strontium Vanadium(IV) Oxides, High-Pressure Synthesis, Crystal Structure
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	Identifier	ZNB-1991-46b-1315
	Volume	46

9	Author	Stefan Vogler, W. Erner Massa, Kurt Dehnicke	Requires cookie*
	Title	Über die Reaktion von Wolframhexachlorid mit Se4N 2; Kristallstruktur von PPh4\|W Cl5(NSeCl)\| On the Reaction of Tungsten Hexachloride with Se4N 2; Crystal Structure of PPh4[WCl5(NSeCl)]
	Abstract	The reaction of tungsten hexachloride with Se4N2 leads to [WCl4(NSeCl)]2, which reacts with pyridine to form [WCl4(NSeCl)Py], and with tetraphenylphosphonium chloride to form PPh4[WCl5(NSeCl)]. which was characterized by an X-ray structure determination. Space group P 2j, Z = 2, 1657 observed unique reflections, R = 0.074, wR = 0.061. Lattice dimen sions at -8 0 C: a = 710.7(1), b = 2217.9(4), c = 953.6(2) pm; ß = 111.93(3) . The [WC15(NScC1)] ion possesses an almost linear WNSe group with bond lengths WN = 188 pm, corresponding to a double bond, and NSe = 200 pm.
	Reference	Z. Naturforsch. 46b, 1625—1628 (1991); eingegangen am 29. Mai 1991
	Published	1991
	Keywords	Chloroselenonitrene Complexes of Tungsten, Synthesis, Crystal Structure
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	Identifier	ZNB-1991-46b-1625
	Volume	46

10	Author	Ulrich Bierbach, Wolfgang Saak, Detlev Haase, Siegfried Pohl	Requires cookie*
	Title	Neutrale und kationische Eisen-Schwefel-Komplexe und -Cluster
	Abstract	Synthese und Kristallstrukturen von [Fe(SR)2L2l * PhMe und [Fe4S4(SR)2 L2\| sowie zur Bildung von [Fe(SR)L3]+, [FeL4]2+, [Fe4S4(SR)L3\| + und [Fe4S4L4\|2+ (R = 2,4,6-/-Pr3C6H 2; L = SC (N M e2)2) Neutral and Cationic Iron-Sulfur Complexes and Clusters Syntheses and Crystal Structures of [Fe(SR)2 L2] • PhM e and [Fe4S4(SR)2 L2], and on the Form ation of [Fe(SR)L3]+, [FeL4]2+. [Fe4S4(SR)L3]+ and [Fe4S4 L4]2+ (R = 2,4,6-/-Pr3C6H 2; L = SC(NM e2)2) The reaction of [FeLL,] (1; L = SC(NMe,),) with KSR (R = 2,4,6-/-Pr3C6H-,) yields [Fe(SR)2L2] • PhMe (2).
	Reference	Z. Naturforsch. 46b, 1629—1634 (1991); eingegangen am 13. Juni 1991
	Published	1991
	Keywords	Iron Sulfur Complexes and Clusters, Synthesis, Crystal Structure
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	Identifier	ZNB-1991-46b-1629
	Volume	46

11	Author	Dietrich Mootz, Klemens Bartm	Requires cookie*
	Title	Zur Kristallchemie von Supersäuren: Bildung und Struktur der tiefschmelzenden Addukte SbF5 * CF3S 0 3H und SbF5 * 7 HF [ 1 ] Crystal Chemistry o f Superaeids: Form ation and Structure of the Low-Melting Adducts SbF5 * C F 3 S 0 3H and S bF s-7 H F [l]
	Abstract	The melting diagram of the superacid system SbFs-C F 3SO,H as well as of SbF5-H F has
	Reference	Z. Naturforsch. 46b, 1659—1663 (1991); eingegangen am 15. Mai 1991
	Published	1991
	Keywords	Superaeids, Melting Diagrams, Crystal Structure, Fluoronium Ion
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	Identifier	ZNB-1991-46b-1659
	Volume	46

12	Author	Z. Naturforsch	Requires cookie*
	Title	Oxidative Addition von Tetramethyldiphosphan und -arsan an C p '-S iM e2-Cp'-überbrückte Molybdän-und Wolframcarbonyl-Komplexe*
	Abstract	O xidative A d d itio n o f T etram ethyldiphosphane and -arsane to Binuclear C p '-S iM e 2 -C p '-B rid g e d M olybdenum and T ungsten C arbonyl Com plexes** W alter A b riel+,a, G e rh a rd B aum +b, H eike B urdorf5 und Jürgen Heck-C a AW H chem consult, Thermal reaction o f M e2Si[Cp'M(CO)3]2 (M = M o, W; Cp' = C5H 4) with tetramethyldi phosphane and -diarsane gives oxidative coupling products with bridging EM e2-groups (E = P, As). With E = P discrete binuclear com pounds are obtained, which on further thermolysis afford new species o f the general formula {M e2Si(Cp'M)2(CO)3(J w-PMe2)2} (5). X -R ay struc ture determ ination o f 5a (M = M o) and N M R data show a PM P-heteroallylic system which is bound to the second metal. In the case o f M = W a second com pound with a mixed hydrido and dim ethylphosphido bridge can be isolated, which shows fluxionality in solution. However, the oxidative additions with tetramethyldiarsane lead to insoluble products which are assumed to be polymeric with C p '-S iM e2-C p ' as well as A sM e2 bridges linking the metal centers.
	Reference	Z. Naturforsch. 46b, 841—8 (1991); eingegangen am 28. N ovem ber 1990
	Published	1991
	Keywords	Oxidative A ddition, Tetramethyldiphosphane, Tetramethyldiarsane, Crystal Structure, Fluxional Behaviour
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	Identifier	ZNB-1991-46b-0841
	Volume	46

13	Author	Dieter Fenske, Sylvia Magull, K. Urt Dehnicke	Requires cookie*
	Title	Synthese und Kristallstruktur von \|Rb(18-Krone-6)\|2IZn(Se4)(Se6)l Synthesis and Crystal Structure o f [Rb(18-Crown-6)]2[Zn(Se4)(Se6)]
	Abstract	[Rb(18-crown-6)]-,[Zn(Se4)(Se6)] has been prepared by the reaction o f a lithium polyselenide solution in D M F with zinc acetate in the presence o f rubidium iodide and 18-crown-6. It forms dark red crystals, which were characterized by FIR spectroscopy as well as by an X-ray struc ture determination. Space group C 2/c, Z = 4, 3012 observed unique reflections, R = 0.073. Lattice dim ensions at —50 °C: a = 1963.1(14), b = 1125.9(9), c = 2060.3(16) pm,/? = 90.05(3) . The com pound has a com plex ionic structure, in which the zinc atom o f the anion [Zn(Se4)(Se6)]2" is coordinated tetrahedrally by four selenium atoms o f a Se42~ and a Se62~ unit in five and seven membered rings, respectively. The complex cations [Rb(18-crown-6)]+ have Rb • ■ • Se contacts o f 360.7 and 372.0 pm with selenium atoms o f the ZnSe4-ring.
	Reference	Z. Naturforsch. 46b, 1011—1014 (1991); eingegangen am 6. Februar 1991
	Published	1991
	Keywords	Polyselenide Complex o f Zinc, Synthesis, IR Spectrum, Crystal Structure
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	Identifier	ZNB-1991-46b-1011
	Volume	46

14	Author	J. Skowronek, W. Preetz, S. M. Jessen	Requires cookie*
	Title	Darstellung, Schwingungsspektren und Normalkoordinatenanalyse der Acetatochloroditechnetate(III)
	Abstract	, cis-T ^ C ^ C C F ^ C ^ I^ (L = axiale Donorbase) sowie Kristallstruktur von a s-T c2(0 2CCH3)2Cl4((CH3)2NC0CH3)2 Preparation, Vibrational Spectra and Norm al C oordinate Analysis o f Acetatochloroditechnetates(III), c« -T c2(0 2C CH 3)2C14L2 (L = Axial Donorbase) and the Crystal Structure of ds-Tc2(0 2C CH 3)2Cl4((CFI3)2N C 0C FI3)2 Tc2(0 2C C H 3),C l4(H 20)2 has been prepared by reaction o f [Tc2C18]2" with acetic anhydride and fluoroboric acid. By treatment with the donor bases L = N ,N-dim ethylform am ide (D M F), N ,N-dim ethylacetam ide (D M A A), dimethylsulfoxide (D M SO), triphenylphosphin-oxide (TPO) and pyridine (Py), the green adducts Tc2(0 2CCH3)2Cl4L2 are formed. The structure o f T c,(O .C C H 3),C l4(D M A A), was determined by X-ray diffraction; space group C 2/c with a = 29.604(4), b = 10.895(2), c = 14.404(2) Ä, ß = 97.87(2)°, Z = 8, /?w = 2.7% . The T c -T c distance is 2.1835(7) Ä , the bridging acetate groups are in c/s-positions. The IR and Raman spectra have been recorded at 80 K and assigned according to point group C-,v, supported by a normal coordinate analysis o f Tc2(0 2C C H 3)2C14(D M A A)2 based on a general valence force field. The stretching interaction constant fd(TcTc) is determined to 3.38 m dyn/Ä. With in creasing donor strength o f the axial ligands, the intense Raman vibration v(TcTc), showing up to three overtones, is lowered from 311 to 282 cm 1. The <5-<5 transitions o f all adducts are observed at 6 4 8 -6 5 2 nm.
	Reference	Z. Naturforsch. 46b, 1305—1314 (1991); eingegangen am 4. März 1991
	Published	1991
	Keywords	Diacetatotetrachloroditechnetate(III) Adducts, Synthesis, Crystal Structure, Vibrational Spectra, Normal Coordinate Analysis
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	Identifier	ZNB-1991-46b-1305
	Volume	46

15	Author	EnriqueG. Utiérrez-Puebla	Requires cookie*
	Title
	Reference	Z. Naturforsch. 46b, 1113 (1991); eingegangen am 9. Januar 1991
	Published	1991
	Keywords	Hexachlorodicuprates, Tetrachlorocuprates, 3-D iethylam ino-5-phenyl-1, 2, 4-dithiazolium Salts, Synthesis, Crystal Structure
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	Identifier	ZNB-1991-46b-1113_n
	Volume	46

16	Author	HansM. Öhrlea, K. Arin Bluhme-Hensena, BirgitM. Iddelhauveb, DietrichM. Ootzb, H. Artm, W. Underlich15	Requires cookie*
	Title	Cyclisierung von Amidoximen mit Oxybis(diphenylboran) Cyclization of Amidoximes with Oxybis(diphenylborane)
	Reference	Z. Naturforsch. 46b, 1219—1222 (1991); eingegangen am 2. April 1991
	Published	1991
	Keywords	Am idoxim es, 2, 3-D ihydro-l, 3, 5, 2-oxadiazaborol Derivatives, Crystal Structure
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	Identifier	ZNB-1991-46b-1219
	Volume	46

17	Author	Thom As Kellersohn, Konrad Beckenkamp, HeinzDieter Lutz	Requires cookie*
	Title	Extrem asymmetrisch gebundene Wassermoleküle - Kristallstrukturen von Sr(OH)Cl * 4 H zO, Sr(OH)Br * 4 H 20 und Ba(O H )I * 4 H 20 Extremely Asymmetrically Bound W ater Molecules - Crystal Structures of Sr(OH)Cl * 4 H 70 , Sr(OH)Br * 4 H 20 , and Ba(OH)I -4 H 20
	Abstract	The crystal structures o f isotypic Sr(OH)Cl 4 H 20 , Sr(OH)Br ■ 4 H zO, and Ba(OH)I ■ 4 H 20 are repojted. The title compounds crystallize in a hitherto unknown structure type, space group P i, Z = 2. The final R values obtained are 0.0261, 0.069, and 0.062, respectively. The coordination o f the metal ions is monocapped square antiprismatic with 7 H2Ö, 1 OH~ and 1 halide ion. The halide ions separate metal/water/hydroxide layers. Each o f the four crystallo-graphically different water molecules serves as donor for one very strong and one very weak hydrogen bond and, hence, is extremely asymmetrically bound. Owing to this strong distor tion, the largest one known so far, the OH stretching vibrations o f the H 20 m olecules are intramolecularly decoupled as shown from vibrational spectra. The enthalpies o f dehydration obtained from differential scanning calorimetry are reported.
	Reference	Z. Naturforsch. 46b, 1279—1286 (1991); eingegangen am 22. April 1991
	Published	1991
	Keywords	Strontium Hydroxide Halides, Barium Hydroxide Halides, Crystal Structure, Hydrates, Asymmetrically Bound H 20
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	Identifier	ZNB-1991-46b-1279
	Volume	46

18	Author	Alfred Zinn, Henning Von Arnim, Werner Massa, Michael Schäfer, Jürgen Pebler, K. Urt Dehnicke	Requires cookie*
	Title	[P h -C (
	Abstract	N S iM e3)2]2FeO ; ein Amidinatokomplex von Eisen(III) mit verzerrt trigonal-bipyramidaler Struktur [P h -C (N S iM e3)2]2FeCl; an Amidinato Complex o flro n (III) with a Distorted Trigonal-Bipyramidal Structure The am idinato complex [P h -C (N S iM e3)2]2FeCl has been prepared by the reaction o f FeOCl with the amidine P h -C (N S iM e3)[N(SiM e3)2] in acetonitrile/THF in the form o f dark red m ois ture sensitive single crystals. The complex was characterized by IR spectroscopy, by its 57Fe-M össbauer spectra, as well as by an X-ray structure determination. Space group P i, Z = 2, 3180 observed unique reflections, R = 0.068. Lattice dimensions at -8 0 C: a = 1210.4(2), b = 1272.7(3), c = 1316.0(3) pm; a = 67.81(3)°, ß = 76.14(3)°, y = 67.19(3)°. The com plex has a molecular structure in which the iron atom is surrounded in a distorted trigonal-bipyramidal fashion with the chlorine ligand and two nitrogen atoms o f different amidinato chelates in equatorial positions. The remaining nitrogen atom s occupy the apical positions.
	Reference	Z. Naturforsch. 46b, 1300 (1991); eingegangen am 28. Februar 1991
	Published	1991
	Keywords	Am idinato Complex o f Iron, Synthesis, IR Spectra, 57Fe M össbauer Spectra, Crystal Structure
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	Identifier	ZNB-1991-46b-1300
	Volume	46

19	Author	Georg Borgs, HelmUt Keck, Wilhelm Kuchen, Dietrich Mootz, ReneW. Iskemann, H. Artm, Ut Wunderlich, Prof Dr, Hans-Georg	Requires cookie*
	Title	Cubane Type M olybdenum -Halogen-Sulfur Clusterdithiophosphinates
	Abstract	Diamagnetic clusters [M o3X -//-(S2)3-//3(S)(R 2PS2)3] 2 -4 (2: X = Cl; 3: X = Br; 4: X = I; 2 -4 : a: R = Et; b: R = Pr; c: R = Bu) are conveniently obtained by reaction o f
	Reference	Z. Naturforsch. 46b, 1525—1531 (1991); eingegangen am 18. April 1991
	Published	1991
	Keywords	M olybdenum -Halogen-Sulfur Clusters, Cubane Type Cluster Core, Dithiophosphinato Ligands, Crystal Structure
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	Identifier	ZNB-1991-46b-1525
	Volume	46

20	Author	R.Alf Fuchs, Peter Klüfers	Requires cookie*
	Title	Heteronukleare Komplexverbindungen mit M etall-M etall-Bindungen, V [1]
	Abstract	Umsetzungen mit [(NH3)2CuCo(CO)4l: Synthese und Struktur von \|(PPh3)2CuCo(CO)4\|, [Cu{P(OM e)3}4][Cu{Co(CO)4}2] und (Ph3P)2N \|C u{C o(C O)4}2] H eteronuclear C o-ordination Com pounds with M e ta l-Metal-Bonds, V [1] Reactions with [(NH3)2CuCo(CO)4]: Synthesis and Structure of [(PPh3)2CuCo(CO)4], [Cu{ P(OM e)3}4][Cu{Co(CO)4}2] and (Ph3P)2N[Cu{Co(CO)4}2] The heteronuclear carbonyl complex [(NH3)2CuCo(CO)4] 1 reacts with the phosphane li gands PPh3, PEt3 and P(OMe)3. A dinuclear complex, [(PPh3)2CuCo(CO)4] 2, is formed with PPh3, while trinuclear anionic [Cu{Co(CO)4}2]~ species are formed with the other phosphane ligands. The crystal structure of 2 (C u-C o = 255.2(2) pm) and the structures of two com pounds with trinuclear anions, [Cu{P(OMe)3}4][Cu{Co(CO)4}^] 3 (C u-C o = 232.64(8) and 233.10(8) pm) and PPN[Cu{Co(CO)4}2] 6 (C u-C o = 238.1(l)"and 234.3(1) pm), have been determined by X-ray crystallography. The angle Cax-C o -C eq of tetracarbonyl cobalt com pounds (i.e. the deviation from tetrahedral geometry) depends on the charge of the Co(CO)4 fragment, as calculated with the electronegativity equalization scheme of Bratsch (J. Chem. Ed. 61, 588 (1984)).
	Reference	Z. Naturforsch. 46b, 507—518 (1991); eingegangen am 18. September 1990
	Published	1991
	Keywords	Cobalt Carbonyl Complexes, Bi-and Trinuclear Copper Cobalt Compounds, Phosphorus Ligands, Crystal Structure, Electronegativity Equalization
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	Identifier	ZNB-1991-46b-0507
	Volume	46

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