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1	Author	J. Pirnat, J. Lužnik, Z. Trontelj, P. K. Kadaba	Requires cookie*
	Title	Iodine NQR and Phase Transitions in [N(CH 3 ) 4 ] 2 ZnI 4 * a
	Abstract	Using a superregenerative NQR spectrometer, the temperature dependence of 127 I NQR spectra in [N(CH 3) 4 ] 2 ZnI 4 was measured between 167 and 335 K. The measurements confirm two known structural phase transitions at 219 and 257.5 K. The correspondence between the distinct regions of iodine NQR spectra and the crystal structure is discussed. The relation of [N(CH 3) 4 ] 2 ZnI 4 to the incommensurate family with the general formula X 2 YZ 4 and the high temperature (paraphase) crystal space group D^ (Pmcn) is studied.
	Reference	Z. Naturforsch. 45a, 349—352 (1990); received August 23 1989 in revised form 25 November 1989
	Published	1990
	Keywords	NQR, phase transitions, ferroelectric, crystal structure, displacement modulation
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	Identifier	ZNA-1990-45a-0349
	Volume	45

2	Author	Siegfried Pohl	Requires cookie*
	Title	Thioharnstoff-Derivate als Liganden in
	Abstract	Eisen-Komplexen: Synthese und Kristallstrukturen von [FeI2L2l, [Fe2I4L3], (L -L) 2+\|FeI4-\| 2 (L = (M e2N)2CS) und \|Fe2I4(C6H l0(N H -C S -N H M e)2)2\| mit einer Notiz zu [FeIL3]+\|Fe4S4I3L]-T hiourea D erivatives as Ligands in Iro n Complexes: Syntheses and C rystal Structures o f [F eI2L2], [ F e J 4 L3], (L -L) 2 +[FeI4-] 2 (L = (M e2N)2CS) an d [Fe2I4(C 6H 10(N H -C S -N H M e) 2)2] and a N o te on [F eIL 3]+[F e4S4I3L]~ U lrich Bierbach, W olfgang Saak, D etlev H aase u nd [FeI2L2] (1) and [Fe2I4L3] (2) are obtained from the reaction o f F e l2 and
	Reference	(Z. Naturforsch. 45b, 45 [1990]; eingegangen am 26 Juli / 18. September 1989)
	Published	1990
	Keywords	Thiourea Complexes, Iron C om pounds, Synthesis, Crystal Structure
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	Identifier	ZNB-1990-45b-0045
	Volume	45

3	Author	Sabine Paashaus, R. Üdiger, K. Niep	Requires cookie*
	Title
	Abstract	The pseudobinary systems E T e-E T eH a l (E/H al = A l/I,Br; G a/I.B r,C l; In/I,Br) contain the intermediate phases E3Te3Hal, having incongruent melting behavior (decom position at temperatures between 386 °C and 718 °C). The crystal structures (orthorhombic, Pnma) o f the isotypic ternary phases contain one-dim ensional macrom olecules, in which (Te3 3EInHal)-tetrahedra and (Te3 3G a2nTe3/3) units (staggered conform ation) are linked by com m on T e -T e -edges. The macromolecules can be described in terms o f fragments o f an ETe-crystal structure o f the GaTe structural type. In this way, halogen acts as an oxidizing agent which then satu rates the free valence at the Em positions. Larger fragments o f a respective ETe-crystal struc ture are expected to be present in the crystal structure o f InTeC lv (x ~ 0.16) which is an inter mediate phase (m.p. = 418 °C; incongruent) in the quasibinary system In T e-In T eC l.
	Reference	Z. Naturforsch. 45b, 667—6 (1990); eingegangen am 6. N ovem ber 1989
	Published	1990
	Keywords	Phase Relations, Crystal Structure, Mixed Valency Phases
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	Identifier	ZNB-1990-45b-0667
	Volume	45

4	Author	WolfgangA H Errm Ann, JosefK. Felixberger, JosefG. Kuchler, Eberhardt Herdtweck	Requires cookie*
	Title	Alkin-Komplexe des Rheniums in hohen Oxidationsstufen Alkyne Complexes of Rhenium in High Oxidation States
	Abstract	The class o f ^-alkyne complexes o f metals in medium and high oxidation states has been extended by the type C H 3R e 0 2(R C = C R) (3a-i). Exchange o f alkyne for oxo ligands under reducing conditions has been employed as a new general synthesis. C om pounds 3 are thus ob tained by reaction o f methyltrioxorhenium(VII) (1) with the alkynes 2 a -i in the presence o f a ca. 1.1-fold molar amount o f polymer-bound triphenylphosphane as reducing agent (
	Reference	Z. Naturforsch. 45b, 876—8 (1990); eingegangen am 30. N ovem ber 1989
	Published	1990
	Keywords	M ethyloxorhenium Alkynes, Synthesis, Crystal Structures
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	Identifier	ZNB-1990-45b-0876
	Volume	45

5	Author	R. J. Schubert, K.-J Range	Requires cookie*
	Title	T etra-w-butylammoniumdicyanoaurat(I), (/j-C4H9)4N Au(CN)2 Tetra-/7-butylammonium Dicyanoaurate(I), (az-C4H9)4N A u(C N)2
	Abstract	Single crystals o f (/j-C4H9)4N A u (C N) 2 were obtained by crystallization using the tempera ture decreasing method in a newly developed com puter-controlled apparatus. The colourless crystals aor e monoclinic, space group A 2/n, with a = 20.216(2) Ä, b = 13.130(1) A, c = 9.328(1) A, and ß = 109.69(1)°. The measured density is 1.45 g/cm 3, which agrees with the cal culated density o f 1.40 g/cm 3 for Z = 4. The structure was solved by Direct M ethods using 674 independent reflections and refined by least-squares procedures to conventional and weighted R factors o f 0.068 and 0.058, respectively. The nearly linear [A u(C N)2]~-anions form pseudo-hexagonal layers, in which they are arranged parallel to each other. The shortest A u -A u dis tance is 8.05 A. The stacking o f the layers produces pseudo-trigonal channels, occupied by the cations. The tetra-«-butylammonium cation has four ordered trans chains with idealized D 2d symmetry (42 m).
	Reference	Z. Naturforsch. 45b, 1118—1122 (1990); eingegangen am 12. Februar 1990
	Published	1990
	Keywords	Tetra-«-butylammonium Dicyanoaurate(I), Crystal Growth, Crystal Structure
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	Identifier	ZNB-1990-45b-1118
	Volume	45

6	Author	Michael Schäfer, Jürgen Pebler, Beatrice Borgsen, Frank Weller, K. Urt Dehnicke	Requires cookie*
	Title	21Sb-Mössbauer-spektroskopische und strukturchemische Untersuchungen an Kronenetherkomplexen SbX3(15-Krone-5) mit X = F, Cl, Br, I. Eine Analyse der Orbitalbesetzungszahlen 12lSb-M össbauer-Spectroscopic and Structural Investigations on Crown Ether Complexes SbX3(15-Crown-5) with X = F, Cl, Br, I. A Population Analysis Crown Ether C om plexes SbX3(15-crown-5)
	Abstract	The crown ether complexes SbX3(15-crown-5) with X = F, Cl, Br, and I have been prepared by reactions o f 15-crown-5 with the corresponding antimony trihalides in acetonitrile solu tions. The com pounds were characterized by IR spectroscopy as well as by l21Sb-M össbauer spectroscopy. A m ethod o f orbital population analysis utilizing both M össbauer isomer shifts and quadrupole coupling has been developed for Sb(III) antimony halides and their crown ether com plexes. SbF 3(l 5-crown-5) was also characterized by an X-ray structure determination: Space group P 2 ,/«, Z = 4, 3628 observed unique reflexions, R = 0.032. Lattice dim ensions at 19 °C: a = 891.54(6), b = 1277.26(6), c = 1277.66(7) pm, ß = 95.029(4)3. The com plex has a molecular structure in which the antimony atom is surrounded by three F-atom s with mean bond lengths o f 192.4 pm and by the five oxygen atom s o f the crown ether molecule with mean bond lengths o f 293.9 pm.
	Reference	Z. Naturforsch. 45b, 1243—1250 (1990); eingegangen am 5. März/9. Mai 1990
	Published	1990
	Keywords	Syntheses, IR Spectra, 12lSb-M össbauer Spectra, Crystal Structure
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	Identifier	ZNB-1990-45b-1243
	Volume	45

7	Author	Dirk Johrendt, Albrecht Mewis	Requires cookie*
	Title	Darstellung und Kristallstruktur der Verbindungen SEPdP (SE = Seltenerdelement) Preparation and Crystal Structure of SEPdP C om pounds (SE = Rare Earth Element)
	Abstract	The new compounds SEPdP (SE = L a -G d), which were prepared by heating the elements, crystallize with a modified N i2In-type structure. The phosphides o f SE = D y -L u attain the orthorhombic TiNiSi-type structure. A comparison o f the cell volumes suggests that europium has intermediate valence in EuPdP.
	Reference	Z. Naturforsch. 45b, 1262—1266 (1990); eingegangen am 19. März 1990
	Published	1990
	Keywords	Rare Earth Elements, Palladium, Phosphides, Crystal Structure
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	Identifier	ZNB-1990-45b-1262
	Volume	45

8	Author	Siegfried Pohl, W. Olfgang Saak, R. Ain, Er Lotz, Detlev Haase	Requires cookie*
	Title	Zur Existenz schwacher Wechselwirkungen zwischen Sb(III) und Phenylgruppen: Sb2 Br6 (SPPh3)2, Sb2 I6 (SePPh3 ) 2 * 2 CH2 C12, Sb4 Br12(SPM e2 Ph) 4 und (Ph4 P)2 Sb2 Br8 * CH3CN
	Abstract	On the Existence o f W eak In teractio n s between Sb(III) and Phenyl G roups: Sb2Br6(SP Ph3)2, Sb2I6(SeP Ph3)2 • 2 C H 2C12, Sb4B r12(SPM e2Ph)4 and (Ph4P)2Sb2Br8 • C H 3CN The com pounds Sb2Br6(SPPh3)2 (1), Sb2I6(SePPh3)2-2 C H 2C12 (2), and Sb4Br12(SPMe2Ph)4
	Reference	Z. Naturforsch. 45b, 1355 (1990); eingegangen am 6. März 1990
	Published	1990
	Keywords	Sb(III)-Phenyl Interaction, Antimony Trihalides, Crystal Structure
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	Identifier	ZNB-1990-45b-1355
	Volume	45

9	Author	H. Einz, Jürgen Beister, K. Arl Syassen, Jürgen Klein	Requires cookie*
	Title	Phase Transition of N a3As under Pressure
	Abstract	We have investigated the high pressure behaviour of N a3As by powder X-ray diffraction. At 3.6 G Pa the material undergoes a reversible phase transition from the N a3As structure (P 6 3/ mmc, a = 487.4(8) pm, c = 851.5(20) pm, Z = 2, at 3.6 G Pa) to the Li3Bi structure type (Fm 3m , a = 683.5(15) pm, Z = 4, at 3.6 GaP). The equation of states is given for the pressure range up to 26 GPa. Results are discussed with respect to structural properties of related A3BV-compounds.
	Reference	Z. Naturforsch. 45b, 1388—1392 (1990); received M arch 7 1990
	Published	1990
	Keywords	High Pressure, Crystal Structure, Phase Transition
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	Identifier	ZNB-1990-45b-1388
	Volume	45

10	Author	Dietm Ar Stalke, Ursula Pieper, Susanne Vollbrecht, Uwe Klingebiel	Requires cookie*
	Title	Lithium-Iminofluorsilan und Natriumfluorsilylamid -ein Vergleich Lithium-Iminofluorosilane and Sodium-Fluorosilylamide -a Com parison
	Abstract	The metalation o f 2,4,6-trw m -butylam ino-te/'/-butylfluorom ethylsilane (1) with butyl-lithium leads to the formation o f the LiF adduct o f the iminosilane 2. In 2 the silicon atom is pentavalent and four-coordinated. The corresponding sodium com pound is the fluorosilyl-amide 3. The nitrogen has a planar environment in 3.
	Reference	Z. Naturforsch. 45b, 1513—1516 (1990); eingegangen am 27. Dezember 1989/8. März 1990
	Published	1990
	Keywords	Iminosilane, Sodium-Fluorosilylamid, Crystal Structure, Lithium-Iminofluorosilane
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	Identifier	ZNB-1990-45b-1513
	Volume	45

11	Author	Rolf Minkwitz, AndreasK. Ornath, Renate Krause, Hans Preut	Requires cookie*
	Title	Über die Darstellung der
	Abstract	(Chlorthio)sulfoniumsalze [(CH3)2SSSC l]+SbF6-, I(CH3)2SSCI]+SbF6-und des isomeren [(CH3)(C I)S -S C H 3]+SbCl6-[ l ] On the Preparation o f the (Chlorothio)sulfonium Salts [(CH3):SSSCl]+SbF6-, [(CH3),SSCl]+SbF6-and the Isomer [(CH3)(C l)S -S C H 3]+SbCl6-[1] The preparation o f the stable com pounds [(CH3)2SSCl]+SbF6~ and [(CH3)2SSSCl]+SbF6~ from [(CH3)2SH ]+SbF6~ and SC12 and S2C12, resp., is reported. The isomer [(CH3)(C l)S -S C H 3]+SbCl6" is prepared from [SCl3]+SbCl6~ and CH,SH in the molar ratio 1:2. For this salt a crystal structure analysis was carried out (Space group P 2,2,2,, Z = 4,a = 750.1(4), b = 1133.7(3), c= 1614.8(3) pm).
	Reference	Z. Naturforsch. 45b, 1637—7 (1990); eingegangen am 4. April 1990
	Published	1990
	Keywords	(Chlorothio)sulfonium Salts, Preparation, Crystal Structure
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	Identifier	ZNB-1990-45b-1637
	Volume	45

12	Author	Hans-W Alter, Swidersky, K. Urt Dehnicke	Requires cookie*
	Title
	Abstract	[OsC14(C H 3C N)2] • 1/2C H 3CN has been pre pared by the reaction o f OsCl5 with acetonitrile in a slow reaction at room temperature, forming red, moisture sensitive crystals. The com pound was characterized by IR spectroscopy as well as by an X-ray structure determination. Space group Pnma, Z = 4, 1281 observed unique reflexions, R = 0.031. Lattice dimensions at 20 °C: a = 1032.5(5), b = 1356.0(7), c = 975.9(5) pm. The complex has a molecular structure, in which the osmium atom is octahedrally coordinated by four chlorine atoms and by two N -atom s o f the cis-coordinated acetonitrile molecules. The included C H 3C N m olecules are disordered in two posi tions.
	Reference	Z. Naturforsch. 45b, 1210—1212 (1990); eingegangen am 26. Februar 1990
	Published	1990
	Keywords	Acetonitrile Solvate o f Osmium Tetrachloride, Synthesis, IR Spectra, Crystal Structure
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	Identifier	ZNB-1990-45b-1210_n
	Volume	45

13	Author	W. Preetz, P. Hollmann, G. Thiele, H. Hillebrecht	Requires cookie*
	Title	Darstellung, Reaktionen und spektroskopische Charakterisierung von \|O s2X8\|2", X = Cl, Br, I, und Kristallstruktur von (P P N )2\|O s2I8\| * 2 CH2C12 Preparation, Reactions and Spectroscopic Characterization of [Os2X 8]2-, X = Cl, Br, I, and Crystal Structure o f (PPN )2[Os2I8] ■ 2 C H 2C12
	Abstract	The triply bonded octahalogenodiosm ate(III) anions [Os2X 8]2-, previously known with X = Cl, Br, have now been extended to include the iodide with two staggered OsI4 units. This com pound was prepared by treating [Os2Cl8]2' with N al at room temperature in acetone solu tion. The structure determination by X-ray diffractometry on single crystals o f (P P N)2[Os2I8] • 2 C H 2C12, reveals crystallization in the m onoclinic system, space group P 2 ,/c with Z = 4. The O s~O s triple bond is with 2.212(1) Ä the longest within the three octahalogenodiosm ates(III). The Raman spectra show v(OsOs) at 285, [Os2Cl8]2-; at 287, [Os2Br8]2_ and for the iodo compound at 270.1 cm ' 1 with up to three overtones. The spectro scopic constants are calculated to be a», = 270.9 cm -1; X u = -0 .5 0 cm "1. The 10 K UV-VIS spectra o f solid [(/7-C4H9)4N ]2[Os2X 8] exhibit ö~n* transitions with maxima at 723, 690 and 643 nm, superimposed by vibrational fine structures with long progressions o f 195, 211 and 183 cm -1 for X = Cl, Br, I, respectively. Oxidation o f [Os2X 8]2~, X = Cl, Br with the corresponding halogen leads to the cleavage o f the O s -O s bond, and the dekahalogenodiosm ates(IV), [Os2X l0]2-, are formed.
	Reference	Z. Naturforsch. 45b, 1416—1424 (1990); eingegangen am 12. März 1990
	Published	1990
	Keywords	O ctaiododiosm ate(III), Synthesis, Crystal Structure, Raman, UV-VIS Spectra
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	Identifier	ZNB-1990-45b-1416
	Volume	45

14	Author	Rolf Minkwitz, Volker Gerhard, Hans Preut	Requires cookie*
	Title	Halogen-Pseudohalogen-Austausch an Bromsulfoniumsalzen. Dimethylthiocyansulfonium-und Dimethylselenocyansulfonium- Hexafluoroarsenat [1] Halide-Pseudohalide Exchange with Bromosulfonium Salts. Dimethylthiocyanosulfonium-and Dim ethylselenocyanosulfonium-Hexafluoroarsenate [1]
	Abstract	The preparation and spectroscopic characterization o f the sulfonium salts (C H 3)-,SSCN+A sF 6~, (C H 3)2SSeCN + A sF 6~ and (C H 3),S N C O +A sF ^ is reported. The com pounds are obtained via halide-pseudohalide exchange reactions with (C H 3)2SBr+A sF 6~ and the corresponding silver pseudohalide. In addition the crystal structure o f (C H 3)2SS C N +A sF 6~ was determined. The salt crystallizes in the orthorhombic space group Pbca with a = 1048.4(9) pm, b -1290.2(6) pm, c = 1405.1(12) pm and Z = 8.
	Reference	Z. Naturforsch. 45b, 1625—1631 (1990); eingegangen am 19. März 1990
	Published	1990
	Keywords	Raman Spectra, N M R Spectra, Crystal Structure, Bromosulfonium Salts, Hexafluoroarsenate
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	Identifier	ZNB-1990-45b-1625
	Volume	45

15	Author	R. Castro, M.L D Urán, J.A G Arcía-Vázquez, J. Romero, A. Sousa, A. Castiñeiras, W. Hiller, J. Strähle	Requires cookie*
	Title	Electrochemical Syntheses of Pyrimidine-2-thiolato Complexes of Nickel(II) Crystal and Molecular Structure of 2,2 -Bipyridine-bis(pyrimidine-2-thiolato)nickel(II) Monohydrate+
	Abstract	The electrochemical oxidation o f nickel in pyrimidine-2-thione (pym tH) solution yields a com pound o f formula [Ni(pymt)-,]. When pyridine (py), 2,2'-bipyridine (bipy) or 1,10-phenan throline (phen) are added to the solution phase, the product obtained is a complex [Ni(pym t)2py2] or [Ni(pym t)2L] (L = bipy or phen). The crystal structure o f [Ni(pym t)2bipy] • H 20 is monoclinic, space group P 2,/c, with a = 726.6(2), b = 1586.2(2), c =
	Reference	Z. Naturforsch. 45b, 1632—2 (1990); received May 14 1990
	Published	1990
	Keywords	Crystal Structure, Nickel(II) Complexes, Pyrimidine-2-thione, Electrochemical Syntheses
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	Identifier	ZNB-1990-45b-1632
	Volume	45

16	Author	Masahiko Suhara, Koichi Mano	Requires cookie*
	Title	NQR and Phase Transitions in Hexachlorocyclopropane Crystal
	Abstract	35 C1 NQR and DSC studies on phase transitions in hexachlorocyclopropane (HCCP), C 3 C1 6 , are reported. It is found that HCCP has three solid phases: A high temperature disordered phase (Phase I) above 301 K (no NQR spectrum was observed); a metastable phase (Phase II), which exhibited 6 NQR lines from 77 to 270 K; a low temperature phase (Phase III) in which a 24-multiplet of 35 C1 NQR lines at 77 K, the most complex multiplet spectrum ever reported was observed. DSC measurement shows a A-type transition at 301 K and a broad transition of very slow rate at 285 K. The structure and mechanism of phase transitions in HCCP crystal are discussed.
	Reference	Z. Naturforsch. 45a, 339—342 (1990); received August 23 1989
	Published	1990
	Keywords	Nuclear quadrupole resonance, Phase transition, Crystal structure, Differential scan-ning calonmetry, Order-disorder transition
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	Identifier	ZNA-1990-45a-0339
	Volume	45

17	Author	Á. Vez, C. Rés, M. Isternas, O. Argarita, E. Tero, R. Nrique, U. Lr Ic, Ller	Requires cookie*
	Title	Syntheses and Electrochemical Properties of \|C5M e5Ru]+ Complexes with Polycyclic Arenes. Crystal Structure of \|(C5M e5)Ru( //'-chrysene)] PF6 * 0.5 M e2CO
	Abstract	M ononuclear and binuclear com pounds [(C5M e5)Ru(//6-arene)PF6 and [(C5M e5R u)2(//6,/76-arene)](PF6)-, were prepared by reacting (C5M e5)RuCl2, the arene and silver acetate with subsequent addition o f N H 4PF6, for arene = phenanthrene, chrysene, tripheny-lene, fluorene, bifluorene. biphenyl and 4,4'-biphenyl. The mononuclear com pounds were also prepared for arene = naphthalene, anthracene, pyrene and coronene. The 'H and l3C N M R spectra are reported. By cyclic voltammetry all compounds show a first reduction potential that is considerably more positive compared with the free arene. The first cathodic wave is irreversible for a wide range o f scanning speeds. However, the mononuclear coronene and the binuclear phenanthrene com pounds show reversibility. The crystal structure o f [(CsM es)Ru(/76-chrysene)]PF6-0.5 Me^CO was determined by X-ray diffraction (3797 unique observed reflexions, R = 0.098). Crystal data: a = 1689.2(2), b = 1524.0(8), c = 2263.5(3) pm, ß = 107.22(1) , space group P 2,/«, Z = 8. Crystallographically independent, two cations [(C5M e5)Ru(>76-chrysene)]+ and two anions PF6~ are present, but their structures are essentially equal. The [C5M esRu]+ unit is bonded to one o f the terminal benzene rings o f the chrysene in a sandwich manner; the rings bonded to Ru are nearly coplanar. The PF6~ ions and the C5M e5 rings exhibit strong thermal vibrations.
	Reference	Z. Naturforsch. 45b, 658 (1990); received November 18 1989
	Published	1990
	Keywords	Pentamethylcyclopentadienyl-arene-ruthenium Hexafluorophosphates Synthesis, N M R Spectra, Reduction Potentials, Crystal Structure
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	Identifier	ZNB-1990-45b-0658
	Volume	45

18	Author	Jürgen Pebler, K. Urt Dehnicke, Dieter Fenske	Requires cookie*
	Title	Acetylenkomplexe von Rhenium(+VI). Die Kristallstrukturen von \|ReCl4(/i-C3H 7—C = C -/i-C3H 7)(POC13)] und ReCl4(THF)2
	Abstract	Alkyne Complexes o f Rhenium(+ VI). The Crystal Structures of [ReCl4(«-C3H 7-C = C -h-C 3H 7)(POC13)] and ReCl4(T H F)2 Hans-W alter Swidersky, The results o f the magnetic susceptibility measurements o f the previously reported rhenium alkyne complexes [ReCl4(P h C = C P h)]2 • 2 C H 2C12 and [ReCl4(P hC =C P h)(C H 3CN)] in the tem
	Reference	Z. Naturforsch. 45b, 1227—1234 (1990); eingegangen am 20. Februar 1990
	Published	1990
	Keywords	Alkyne Complexes o f Rhenium( + VI), IR Spectra, M agnetic Susceptibility, Crystal Structure
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	Identifier	ZNB-1990-45b-1227
	Volume	45

19	Author	Wolfgang Hönle, Leonhard Walz, Hans Georg, Von Schnering	Requires cookie*
	Title	Bildung und Kristallstruktur von Ethylendiammonium-hydridotrioxophosphat(2 -) [^ N C F ^ C t^ N F y iP H C ^ p Form ation and Crystal Structure of Ethylenediammonium H ydridotrioxophosphate(2-) [HjNCFUCHoNI-ytPHO,]
	Abstract	Ethylenediammonium H yd ridotrioxophosphate(2-) [HjNCH-jCH-jNHjJITHO:,] is formed by slow oxidation o f white phosphorus by oxygen in ethylendiamine. It crystallizes in the space group Pbca with a = 1570.6(4) pm, b = 676.9(5) pm, c = 1267.8(4) pm and Z = 8 formula units in the unit cell. The structure is built from ethylenediammonium dications and tetra hedral phosphonate dianions, linked by O -H -N bonds (d(O--N) = 275.8 pm). The bond distances are d (P -O) = 151.8 pm, d (P -H) = 136.9 pm, d (N -C) = 148.3 pm and d (C -C) = 151.0 pm.
	Reference	Z. Naturforsch. 45b, 1251—1254 (1990); eingegangen am 13. Februar 1990
	Published	1990
	Keywords	Ethylenediammonium H ydridotrioxophosphate(2-), Crystal Structure, Formation, Phosphonate Dianion, Ethylenediammonium Dication
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	TEI-XML for	default:Reihe_B/45/ZNB-1990-45b-1251.pdf
	Identifier	ZNB-1990-45b-1251
	Volume	45

20	Author	Roswitha Schmidt, Brigitte Eisenmann, Rüdiger Kniep, Jürgen Ensling, Philip Gütlich, Reinhard Seidel	Requires cookie*
	Title	Zn2(Z n,_;tFe,)Fel" (P 0 4)3 * 2 H 20 : Darstellung, Kristallstruktur und Mößbauer-Untersuchung Zn2(Z n]_ vF ex .)FeIII(P 0 4)3 -2H 20 : Preparation, Crystal Structure and M össbauer Investigation
	Abstract	Single crystals o f the mixed valency phase Zn2(Z n ,_vF eY)F ein(P0 4)3-2 H20 were grown by hydrothermal treatment o f phosphophyllite (Zn2F e (P 0 4)2-4 H 20) at 160 C in 1 M H3P 0 4. The crystal structure (tricl., P i; a = 641.5(4) pm, b = 914.4(4) pm, c = 983.4(4) pm, a = 70.79(5)°, ß = 78.32(5)°, y = 73.69(5)°; Z = 2) contains P 0 4 tetrahedra, connected via vertices shared with coordination polyhedra o f the metal ions. Cation coordination polyhedra (Fem(Op)5Ow octahedra, (Z n\|_vFeY)(O p)5Ow octahedra and Zn(Op)5 trigonal bipyramids) are connected to centrosymmetrical six-membered chains by sharing com m on O -edges. These short chains are interconnected by com m on vertices o f Zn(Op)4 tetrahedra to form infinitive ribbons o f cation coordination polyhedra. The x-values observed for the substitutional posi tion (Zn,_A .Fev) varied from .x: = 0.5 (single crystal determ ination) to "y = 1 (Mössbauer investi gation). The M össbauer parameters are consistent with high-spin iron in a slightly distorted octahedral environment and valence states (II) and (III).
	Reference	Z. Naturforsch. 45b, 1255—1261 (1990); eingegangen am 19. April 1990
	Published	1990
	Keywords	Orthophosphate Zn/Fe, Mixed Valency C om pound, Hydrothermal Growth, Crystal Structure, Mössbauer Parameters
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	TEI-XML for	default:Reihe_B/45/ZNB-1990-45b-1255.pdf
	Identifier	ZNB-1990-45b-1255
	Volume	45