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1Author    Thomas SchönherrRequires 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 
2Author    K. Irmer, W. PreetzRequires 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 
3Author    J. Skowronek, W. Preetz, S. M. JessenRequires 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 
4Author    M. =. Re, Tc, X. =. Ci, BrJ. Skowronek, W. PreetzRequires 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 
5Author    P. H. Ollm, Ann, W. PreetzRequires 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 
6Author    D. Bublitz, A. Franken, W. Preetz, H. ThomsenRequires 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 
7Author    X. =. Cl, I. V. Br, W. Lorenzen, PreetzRequires 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 
8Author    J. Thesing, J. Baurmeister, W. Preetz, D. Thiery, H. G. Von SchneringRequires 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 
9Author    W. Preetz, B. SteuerRequires 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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 Identifier    ZNB-1996-51b-0551 
 Volume    51 
10Author    H.-H Drews, W. PreetzRequires 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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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1563.pdf 
 Identifier    ZNB-1996-51b-1563 
 Volume    51 
11Author    K. Dallmann, W. PreetzRequires 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 
12Author    J. Seemann, W. PreetzRequires 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 
13Author    K. Dallmann, W. PreetzRequires 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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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0232.pdf 
 Identifier    ZNB-1998-53b-0232 
 Volume    53 
14Author    V. Lorenzena, W. Preetz, W. Kellerb, W. HauboldRequires 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 
15Author    W. PreetzRequires 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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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0045.pdf 
 Identifier    ZNB-2000-55b-0045 
 Volume    55 
16Author    Bromo, P. Prillwitz, W. PreetzRequires 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