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'Normal Coordinate Analysis' in keywords Facet section ZfN Section B [X]

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1	Author	Thomas Schönherr	Requires cookie*
	Title	Zur Existenz diskreter TeCl 5 -Ionen On the Existence of Discrete TeCl s ~ Ions
	Abstract	Discrete mononuclear TeCl 5 " anions were prepared for the first time in solid phase in associa-tion with bulky cations as tetrabutylammonium and tetraphenylphosphonium. The vibrational spectra imply tetragonal symmetry as for the isoelectronic TeF 5 ~ anion which is caused by a stereochemically active lone pair. A complete vibrational assignment is given and supported by a normal coordinate treatment for both ions. The significance of the resulting force constants is briefly discussed.
	Reference	Z. Naturforsch. 43b, 159—164 (1988); eingegangen am 10. August/21. September 1987
	Published	1988
	Keywords	Pentahalogenotellurates, Vibrational Spectra, Normal Coordinate Analysis
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	TEI-XML for	default:Reihe_B/43/ZNB-1988-43b-0159.pdf
	Identifier	ZNB-1988-43b-0159
	Volume	43

2	Author	K. Irmer, W. Preetz	Requires cookie*
	Title	Normalkoordinatenanalyse an Oktaederkomplexen des
	Abstract	Typs [MXW Y6_ J z", M = Ru, Rh, Os, Ir, Pt; X # Y = F, Cl, Br; n = 0 -6 ; z = 1 -3 Normal Coordinate Analysis on Octahedral Complexes of the Type [MX"Y6_ " r , M = Ru, Rh. Os, Ir, Pt; X # Y = F, Cl, Br; n = 0 -6 ; z = 1 -3 Normal coordinate analyses for all com pounds o f the series [MX"Y6_Jr~, M = Ru, Rh. Os, Ir, Pt; X Y = F, Cl, Br; n = 0 -6 ; z = 1 -3 , including the geometric isomers for n = 2, 3, 4 have been performed, based on a general valence force field. For the isostructural species o f the point symmetries Oh (n -0, 6), D 4h (2, 4, trans), C4v (1, 5), C3v (3,fac), C2v (2, 4, cis\ 3, mer) sequences o f decreasing frequencies are established. Due to the different trans influences X < Y (F < Cl < Br) in asymmetric axes X ' -M -Y ' , the M -Y ' bonds are strengthened and the M -X ' bonds are weakened, as indicated by valence force constants for M -Y' up to 21 % high er (P t-C l'), for M -X ' down to 18% lower (P t-F '), as compared with the values calculated for symmetrical X -M -X and Y -M -Y axes, respectively. The influence o f the different central ions and their oxidation numbers on the force field is discussed.
	Reference	Z. Naturforsch. 46b, 1200—1206 (1991); eingegangen am 12. April 1991
	Published	1991
	Keywords	Normal Coordinate Analysis, Force Constants, /rans-Influence, Mixed-Ligand Complexes
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	TEI-XML for	default:Reihe_B/46/ZNB-1991-46b-1200.pdf
	Identifier	ZNB-1991-46b-1200
	Volume	46

3	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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	TEI-XML for	default:Reihe_B/46/ZNB-1991-46b-1305.pdf
	Identifier	ZNB-1991-46b-1305
	Volume	46

4	Author	M. =. Re, Tc, X. =. Ci, BrJ. Skowronek, W. Preetz	Requires cookie*
	Title	Schwingungsspektren und Normalkoordinatenanalyse der Acetatohalogenodimetallate M 2( 0 2CCH3)4X2, M = Re, Tc; X = CI, Br Vibrational Spectra and Norm al Coordinate Analysis of Acetatohalogenodim etalates M 2( 0 2C CH 3)4X
	Abstract	The orange-red Tc2(0 2C C H 3)4Br2 has been prepared for the first time by reaction of [Tc2Brg]2_ with glacial acetic acid and acetic anhydride. The IR and R am an spectra have been recorded at 80 K and are compared with those of the analogous com pounds Tc2(0 2CC H 3)4C12, Re2(0 2C C H 3)4Cl2 and Re2(0 2CC H 3)4Br2. The assignment according to the point group D 4h is supported by normal coordinate analysis based on a general valence force field. The quadruple M -M bond is stabilized by the bridging acetato and destabilized by the axial halogeno ligands. The valence force constants fd(MM) are determined to 3,96-4,08 mdyn/A. The inter action constants fdd(M M /M X), fdd(M M /M O) and fJM M /M M O) are ab o u t three times high er for the technetates as compared with the rhenates. The stronger interaction between oppo site bonds in the equatorial ligand sphere is revealed by the stretching interaction constants d d '' which are about two times higher than fdd for M -O bonds at right angles. The strong coupling of the ring co-ordinates implies extensive mixing of the M -O valence and deform ation modes. The electronic spectra of Tc2(0 2CC H 3)4X, agree with those of the corresponding Re com pounds.
	Reference	Z. Naturforsch. 47b, 482—490 (1992); eingegangen am 10. Oktober 1991
	Published	1992
	Keywords	Tetraacetatodihalogenodirhenates, Tetraacetatodihalogenoditechnetates, Vibrational Spectra, UV-Vis Spectra, Normal Coordinate Analysis
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	TEI-XML for	default:Reihe_B/47/ZNB-1992-47b-0482.pdf
	Identifier	ZNB-1992-47b-0482
	Volume	47

5	Author	P. H. Ollm, Ann, W. Preetz	Requires cookie*
	Title	[Ir2Cl10]2
	Abstract	, und Normalkoordinatenanalyse an Dioktaederkomplexen des Typs IM2X1012", M = Re, Os, Ir, Pt; X = CI, Br Preparation and Characterization of Decachlorodiiridate(IV), [Ir2C l10]2-, and Normal Coordinate Analysis of Bioctahedral Complexes [M2X 10]2", M = Re, Os, Ir, Pt; X = CI, Br On heating the tetraethylammonium salt o f [IrCl6]2-with trifluoroacetic acid the edge shar ing bioctahedral anion [Ir2C l10]2' is formed, the IR and Raman spectra o f which are assigned according to point group D 2h. Norm al coordinate analyses, based on a general valence force field, for [M2X 10]2-, M = Re, Os, Ir, Pt; X = Cl, Br have been performed, resulting in a good agreement o f the calculated frequencies with the bands observed in the IR and Raman spectra. Due to the stronger bonding o f the terminal as compared to the bridging ligands, the valence force constants fd(M X t) are significantly higher than fd(M X b). Darstellung und Charakterisierung von Dekachlorodiiridat(IV),
	Reference	Z. Naturforsch. 47b, 1115—1118 (1992); eingegangen am 8. April 1992
	Published	1992
	Keywords	Decachlorodiiridate(IV), Raman Spectra, IR Spectra, Normal Coordinate Analysis
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	TEI-XML for	default:Reihe_B/47/ZNB-1992-47b-1115.pdf
	Identifier	ZNB-1992-47b-1115
	Volume	47

6	Author	D. Bublitz, A. Franken, W. Preetz, H. Thomsen	Requires cookie*
	Title	Darstellung, U B-NMR-Spektren, Schwingungsspektren und Normalkoordi- natenanalyse von cowy'HWcto-Bis-hexahydro-c/oso-hexaborat, [B6H6-B 6H6]2_, sowie Kristallstruktur von [P(C6H5)4 ]2-cöW7 ww^o-[B6H6-B 6H6 ] Preparation, 11B NMR Spectra, Vibrational Spectra and Normal Coordinate Analysis of con ju ncto-B is-h exah ydro-closo-h exaboratQ , [B6H6-B 6H6]2_, and the Crystal Structure of [ P(C6 H5 )4 ] 2 -conjuncto-[B6 H6-B 6 H6 ]
	Abstract	By reaction of [B6H6]2-with dibenzoylperoxide in dichloromethane conjuncto-[B6H6-b 6h 6]2-is formed. The product could be separated from excess [B6H6]2 by ion exchange chro matography on diethylaminoethyl cellulose. The crystal structure of [P(C6H^ ^ -con ju n cto-[B6H6-B 6H6 ] has been determined by single crystal X-ray diffraction analysis; triclinic, space group PI with a = 10.8315(10), b = 11,2422(12), c = 20.340(2) Ä, a = 91.278° (9), ß = 9 0 .\78° (9), 7 = 105.662°(9). The 1 'B NMR spectrum reveals three signals with the intensity ratio 1:1:4, for two equivalent moieties of the conjuncto molecule ion with local C4v symmetry. The IR and Raman spectra of the deprotonated Cs salts of the 1()B, n B and their respective D isotopomers of conjuncto-[B6H5-B6HS]4_ exhibit characteristic shifts. Using averaged crystallographic data and assuming idealized D4h symmetry, normal coordinate analyses have been performed based on a modified valence force field. With a set of eleven force constants (e.g. fd(BB)C 0njU IK.t0 = 2.9, fd(BB)cage = 1.6 mdyn/A) very good agreement between observed and calculated frequencies has been achieved. From strong vibrational coupling with the B6 clusters two vibrations result for the conjuncto B-B bond at 1142/1198 and 292/304cm-1 for 1 'B/I(IB species, respectively. They can be assigned as anti-phase and in-phase motions of the conjuncto B atoms related to the equatorial B4 planes.
	Reference	Z. Naturforsch. 51b, 609—618 (1996); eingegangen am 7. September 1995
	Published	1996
	Keywords	Crystal Structure, n B NMR Spectra, Vibra tional Spectra, Normal Coordinate Analysis
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0609_n.pdf
	Identifier	ZNB-1996-51b-0609_n
	Volume	51

7	Author	X. =. Cl, I. V. Br, W. Lorenzen, Preetz	Requires cookie*
	Title	Kristallstrukturen von Oi-Bu4N)
	Abstract	[B6C16], (w-Bu4N)[B6Br6] und (Ph3P=N=PPh3)[B6I6] sowie Schwingungsspektren und Normal-koordinatenanalyse der Hexahalogeno-c/osö-Hexaboratradikal-anionen [B6X6]~, X = Cl, Br, I Crystal Structures of («-Bu4N)[B6C16], (rc-Bu4N)[B6Br6], and (Ph3P=N=PPh3)[B6I6], and Vibrational Spectra and Normal Coordinate Analysis of the Hexahalogeno-c/oso-hexaborate Radical Anions [B6X6]-, Oxidation of hexahalogeno-c/oso-hexaborates [B6X6]2_, X = Cl, Br, I, with (NH4)2[Ce(N03)6] in ethanol yields coloured radical ions [B6X6]~. X-ray structure determina tions have been performed on single crystals of («-Bu4N)[B6Cl6] (1) (monoclinic, space group P2,/c,a = 13.144(2),6 = 12.594(2),c = 17.688(5) A,ß = 107.29(2)°,Z=4),(«-B u4N)[B6Br6] (2) (monoclinic, space group P2,/c, a = 13.529(5), b = 13.096(5), c = 17.863(5) Ä, ß = 107.20(5)°, Z = 4) and (Ph3P=N=PPh3)[B6I6] (3) (triclinic, space group P I, a = 9.3137(8), b = 10.6988(10), c = 11.8760 A, a = 102.220(7), ß = 99.34J(8), 7 = 96.030(7)°, Z = 1). The average B-B distan ces are nearly equal (1.733 Ä (1), 1.728 A (2), 1.728 A (3)) while the B-X distances increase (1.762 A (1), 1.912 A (2), 2.120 A (3)). Using the molecular parameters, normal coordinate analyses have been performed and a good agreement of observed and calculated frequencies of 11B and 1 'B labelled derivatives has been achieved. The valence force constants fd(BB) and fd(BX) of [B6X6]" are 1.17 and 4.17 (X = Cl), 1.18 and 3.34 (Br) and 1.18 and 2.60 mdyn/A (I), respectively.
	Reference	Z. Naturforsch. 52b, 565—572 (1997); eingegangen am 19. Februar 1997
	Published	1997
	Keywords	Hexahalogenohexaborates( 1 -), Crystal Structure, Vibrational Spectra, Normal Coordinate Analysis
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	TEI-XML for	default:Reihe_B/52/ZNB-1997-52b-0565.pdf
	Identifier	ZNB-1997-52b-0565
	Volume	52

8	Author	J. Thesing, J. Baurmeister, W. Preetz, D. Thiery, H. G. Von Schnering	Requires cookie*
	Title	Kristallstrukturen
	Abstract	von [P(C6H 5)4 l2 lB6Cl6](CH3CN) 2 und \|P(C 6H 5)4]2 lB6Br6](CH3CN) 2 sowie Schwingungsspektren und Normalkoordinatenanalyse der isotopomeren c/osö-Hexahalogenohexaborate \|"B",#B6-Ä I 2' , X = Cl, Br; n = 0 -6 Crystal Structures o f [P(C6H 5)4]2[B6C16](C H ,C N)2 and [P(C6H s)4]2[B6Br6](CH3CN)2, Vibrational Spectra and Norm al C oordinate Analysis of Isotopomeric cVavo-Hexahalogenohexaborates [n B"10B6_/?X6]2", X = Cl, Br; n = 0 -6 The crystal structures o f (TPP)2[B6C16](CH3CN)2 and (TPP)2[B6Br6](CH3CN)2 were deter mined from single crystal X-ray diffraction analyses at 147 K. They are triclinic, space group P I, and contain nearly regular octahedral anions with bond lengths d (B -B) 1.716, d (B -C l) 1.818 for [B6C16]2" and d (B -B) 1.684, d (B -B r) 1.993 A for [B6Br6]2~. Using these molecular data, norm al coordinate analyses for the ten isotopomers [n Bnl0B6_nX6]2", n = 0 -6 , X = Cl, Br, including the pairs of geometric isomers for n = 2, 3, 4 have been performed, based on a general valence force field. W ith a set of 8 force constants for Cs2[B6Br6] (e.g. fd(BB) = 1.39, fd(BBr) = 3.18 mdyn/Ä) and 10 for Cs2[B6Cl6] (e.g. fd(BB) = 1.30, fd(BCl) = 4.01 mdyn/Ä) the calculated frequencies are in good agreement with observed IR (10 K) and Raman bands (80 K) in natural abundance as well as for "B-and l0B-enriched derivatives. For the series [B6X6]2", X = Cl, Br, I the correlation of decreasing bond lengths d(B -B) and increasing force constants fd(BB) along with vibrational coupling between the B6 cage and the substituent sphere is discussed.
	Reference	Z. Naturforsch. 46b, 800—808 (1991); eingegangen am 6. Dezember 1990
	Published	1991
	Keywords	H exachlorohexaborate(2-), H exabrom ohexaborate(2-), Crystal Structure, Normal Coordinate Analysis, Isotopomers
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	TEI-XML for	default:Reihe_B/46/ZNB-1991-46b-0800.pdf
	Identifier	ZNB-1991-46b-0800
	Volume	46

9	Author	W. Preetz, B. Steuer	Requires cookie*
	Title	Darstellung, Schwingungsspektren und Normalkoordinatenanalyse der 10B-und n B-Isotopomeren von [B2(NCS)6]2_ sowie Kristallstruktur von (Ph3P=N=PPh3)2[B2(NCS)6]
	Abstract	By reaction of [B6H 6]2_ with a solution of (SCN)2 in dichloromethane in the presence of solid KOH the hexaisothiocyanatodiborate anion [B2(NCS)6]2~ is formed and can be isolated by fractionated crystallization. The crystal structure of (PNP)2[B2(NCS)6] has been determ i
	Reference	Z. Naturforsch. 51b, 551—556 (1996); eingegangen am 11. August 1995
	Published	1996
	Keywords	H exaisothiocyanatodiborate(2-), Crystal Structure, Vibrational Spectra, Isotopomers, Normal Coordinate Analysis
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0551.pdf
	Identifier	ZNB-1996-51b-0551
	Volume	51

10	Author	H.-H Drews, W. Preetz	Requires cookie*
	Title	Darstellung, 19F-und 195Pt-NMR-Spektren, Schwingungsspektren und Normalkoordinatenanalyse von Fluoro-Chloro-Bromo-Platinaten(IV) Preparation, l9F and 195Pt NMR Spectra, Vibrational Spectra and Normal Coordinate Analysis of Fluoro-Chloro-Bromo-Platinates(IV)
	Reference	Z. Naturforsch. 51b, 1563—1570 (1996); eingegangen am 2. August 1996
	Published	1996
	Keywords	Fluoro-Chloro-Bromo-Platinates(IV), l9F NMR Spectra, 195Pt NMR Spectra, Vibrational Spec tra, Normal Coordinate Analysis
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	Identifier	ZNB-1996-51b-1563
	Volume	51

11	Author	K. Dallmann, W. Preetz	Requires cookie*
	Title	Kristallstrukturen, Schwingungsspektren und Normalkoordinaten- analysen von cis-und ^rans-[OsX2(acac)2], X = Cl, Br, I Crystal Structures, Vibrational Spectra and Normal Coordinate Analyses of cis-and rrarcs-[OsX2(acac)2l, X = Cl, Br, I
	Abstract	The crystal structures of frans-tOsCM acac)?] (triclinic, space group P i, a = 7.4114(5),
	Reference	Z. Naturforsch. 52b, 965—974 (1997); eingegangen am 12. Mai 1997
	Published	1997
	Keywords	Crystal Structure, IR Spectra, Raman Spectra, Normal Coordinate Analysis, trans Influence
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	Identifier	ZNB-1997-52b-0965
	Volume	52

12	Author	J. Seemann, W. Preetz	Requires cookie*
	Title	Schwingungsspektren und Normalkoordinatenanalyse von Hexathiocyanatoplatinat(IV), Kristallstruktur von [Py2CH2][Pt(SCN)6] Vibrational Spectra and Normal Coordinate Analysis of Hexathiocyanatoplatinate(IV), Crystal Structure of [Py2CH2][Pt(SCN)6]
	Abstract	By treatment of [PtCl6]2-with an excess of SCN~ in aqueous solution [Pt(SCN)6]2~ is formed. The X-ray structure determination on a single crystal of [Py2CH2][Pt(SCN)6] (orthor-hombic, space group Pna21? a = 15.5084(9), b = 11.8444(11), c = 13.2830(9)A, Z = 4) shows, that the thiocyanate groups are exclusively S-coordinated with average Pt-S distances of 2.378 A and Pt-S-C angles in the range from 103.1° to 108.1°. Based on the molecular parameters of the X-ray determination the low temperature (10 K) IR and Raman spectra have been assigned by normal coordinate analysis. The valence force constant is fd(PtS) = 1.62 mdyn/A.
	Reference	(Z. Naturforsch. 53b, 13—16 [1998]; eingegangen am 15. Oktober 1997)
	Published	1998
	Keywords	Hexathiocyanatoplatinate(IV), IR Spectra, Raman Spectra, Normal Coordinate Analysis, Crystal Structure
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0013.pdf
	Identifier	ZNB-1998-53b-0013
	Volume	53

13	Author	K. Dallmann, W. Preetz	Requires cookie*
	Title
	Abstract	Normalkoordinatenanalyse von [Os(acac)3] Synthesis, Crystal Structure, Vibrational Spectra, and Normal Coordinate Analysis o f [Os(acac)3] In the reaction o f K 2[O sCl6] with boiling water/acetylacetone (1:1) a mixture o f different chloro-acetylacetonato complexes is formed, from which [Os(acac)3] can be isolated by column chromatography with dichloromethane on silica gel. The crystal structure o f [Os(acac)3] (m o noclinic, space group P2,/c,a = 13.968(5), b = l . 517(5), c = 16.455(5) A ,ß = 98.939(5)°, Z = 4) has been determined by single crystal X-ray diffraction analysis. High resolution IR and Raman spectra were measured at low temperature (10 K). Based on the molecular parameters o f the X-ray structure determination a normal coordinate analysis has been performed and the normal modes o f vibration have been assigned. With a set o f 32 force constants, taking into account the intraligand vibrations, a good agreement between observed and calculated frequencies has been achieved. The valence force constants are fd(OsO) = 3.19 and fd(O C) = 6.74 mdyn/A.
	Reference	Z. Naturforsch. 53b, 232—238 (1998); eingegangen am 26. November 1997
	Published	1998
	Keywords	Tris(acetylacetonato)osmium(III), Crystal Structure, IR Data, Raman Data, Normal Coordinate Analysis
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	Identifier	ZNB-1998-53b-0232
	Volume	53

14	Author	V. Lorenzena, W. Preetz, W. Kellerb, W. Haubold	Requires cookie*
	Title	Schwingungsspektren und Normalkoordinatenanalyse der Tetrahalogeno-c/os0-l,2-diphosphahexaborane P2B4X4, X = CI, Br Vibrational Spectra and Normal Coordinate Analysis of the Tetrahalogeno-c/oso-l,2-diphosphahexaboranes P2B4X 4, X = Cl, Br
	Reference	Z. Naturforsch. 54b, 1229—1234 (1999); eingegangen am 10. August 1999
	Published	1999
	Keywords	Tetrahalogeno-c/aso-1, 2-diphosphahexaboranes, Vibrational Spectra, Normal Coordinate Analyses, Force Constants
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	Identifier	ZNB-1999-54b-1229
	Volume	54

15	Author	W. Preetz	Requires cookie*
	Title	Kristallstrukturen
	Abstract	, Schwingungsspektren und Normalkoordinatenanalyse von (Ph3PNPPh3)[O sF5C l] CH2Cl2 und cis-(Ph3PNPPh3)[OsF4C\2]C H 2Ch Crystal Structures, Vibrational Spectra and N orm al C oordinate A nalysis o f (Ph3P N PP h3) [O sF5Cl] C H 2C12 and ris-(P h 3PN PPh3)[O sF4C l2]-CH2C l2 B. L orenzen By careful oxidation of the pure fluorochloroosmates(IV) with BrF3 in dichloromethane the mixed pentavalent complex anions [OsF5C1]_ and m -[O sF 4Cl2] _ are formed. X-ray structure determinations on single crystals have been performed of (Ph3PNPPh3)[OsF5C l]C H 2Cl2 (1) (triclinic, space group P i, a = 12.153(5), b = 12.387(5), c = 14.229(5) A , a = 70.07(1), ß = 65.46(1), 7 = 72.87(1)°, Z = 2) and ds-(P h 3PNPPh3)[OsF4Cl2] C H 2Cl2 (2) (triclinic, space group P i, a = 11.987(2) b = 13.083(2), c = 14.456(2) A , a = 66.30(1), ß = 65.47(1), 7 = 71.22(1)°, Z = 2). Based on the molecular parameters of the X-ray determinations the IR and Raman spectra for the anions of 1 and 2 have been assigned by normal coordinate analysis. Due to the mutual trans influences the valence force constants of asymmetrically coordinated octahedral axes F-Os-Cl' differ from those of the symmetric F-Os-F axes. The data are for 1: fd(OsF) = 3.95, fd(OsF) = 4.07, fd(OsCl') = 2.51 and for 2: fd(OsF*) = 3.45, fd(OsF) = 3.97, fd(OsCl') = 2.42 mdyn/A.
	Reference	(Z. Naturforsch. 55b, 45—50 [2000]; eingegangen am 9. November 1999)
	Published	2000
	Keywords	Pentachlorofluoroosmate(V), ds-Tetrachlorodifluoroosmate(V), Crystal Structure, Vibrational Spectra, Normal Coordinate Analyses
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	Identifier	ZNB-2000-55b-0045
	Volume	55

16	Author	Bromo, P. Prillwitz, W. Preetz	Requires cookie*
	Title	Darstellung, Schwingungsspektren und Normalkoordinatenanalyse der
	Abstract	The IR and Raman spectra of the ten brom o-iodo-rhenates(IV) [ReBr"I6_"]2 -, n = 0 -6 , including the geometrical isomers for n -2,3,4, have been recorded at 80 K. The vibrational spectra are com pletely assigned according to point groups O h, D 4h, C4v, C3v, and C2v, as supported by normal coordinate analyses based on a general valence force field. Due to the different mms-influences Br < I in asymmetric axes B r '-R e -I ', the R e -I ' bonds are strengthened and the R e -B r ' bonds are weakened, as indicated by valence force constants, for R e -I ' on average 8,5% higher and for O s -B r ' 8,3% lower, as compared with the values calculated for symmetric I -R e -I and B r -R e -B r axes, respectively
	Reference	Z. Naturforsch. 49b, 753—7 (1994); eingegangen am 7. März 1994
	Published	1994
	Keywords	-Iodo-Rhenate(IV), [ReBr, !^, ]2-, n = 0 -6 Brom o-Iodo-Rhenates(IV ), Stereoisomers, rra/is-Influence, Vibrational Spectra, Normal Coordinate Analysis
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	Identifier	ZNB-1994-49b-0753
	Volume	49