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'force constants' in keywords Facet   section ZfN Section B  [X]
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1Author    HelgeW. IllnerRequires cookie*
 Title    Das Infrarotspektrum von matrixisoliertem SFC1 Infrared Spectrum of M atrix Isolated SFCl  
  Reference    Z. Naturforsch. 39b, 314 (1984); eingegangen am 27. September/29. November 1983 
  Published    1984 
  Keywords    Sulfur Chloride Fluoride, IR Spectra, Force Constants 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0314.pdf 
 Identifier    ZNB-1984-39b-0314 
 Volume    39 
2Author    Z. NaturforschRequires cookie*
 Title    Schwingungsspektren und Kraftkonstanten von linearen  
 Abstract    Anionen [MnP2]4' und [M!X2]5-(M11 = Zn, Cd, Hg; M1 = Cu, Ag; X = E15) in den Kaliumverbindungen und in Na4[HgP2] V ibrational S pectra and Force C onstants of the L inear A nions [M n P2]4-and [M IX 2]5" (M 11 = Z n, Cd, Hg; M 1 -Cu, Ag; X -E 15) in Potassium C om pounds and in N a4[H gP2] M eh m et S om er The vibrational spectra of the title compounds have been recorded and interpreted based on the symmetry o f the isolated linear anions [M X2]"~ (M = Cu, Ag, Zn, Cd. Hg; X = P, As, Sb). The calculated stretching force constants are: f(M n -P) = 1.89 {M11 = Zn}, 1.66 {Cd}, 1.83 {Hg} N cm -1 and f(C u -X) = 1.27 {X = P}, 0.99 {Sb} and f(A g -A s) = 0.93 N c m " 1 respectively. These are compared with those of the isoelectronic m olecules M nY 2 and [M'Y2]~ in relation to charge effects (M 11 = Zn, Cd, Hg; M 1 = Cu, Ag; Y = Cl, Br). 
  Reference    Z. Naturforsch. 49b, 1203—1206 (1994); eingegangen am 22. März 1994 
  Published    1994 
  Keywords    Vibrational Spectra, Force Constants, Zintl Phases 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1203.pdf 
 Identifier    ZNB-1994-49b-1203 
 Volume    49 
3Author    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 
4Author    Lothar Ohse, Mehmet Somer, Wolfgang Blase, Gerhard CordierRequires cookie*
 Title    Verbindungen mit SiS2-isosteren Anionen i  
 Abstract    [AlX4/2 3 ] und i |InP4/23 ]: Synthesen, Kristallstrukturen und Schwingungsspektren von Na3|AlX2], K2Na[AlX2] und K3IInP2] (X = P, As) Com pounds with SiS2 Isoelectronic Anions l [A1X4 23-] and i [InP4/23-]: Synthesis, Crystal Structures and Vibrational Spectra of N a3[AlX2], K 2Na[AlX2] and K 3[InP2] (X = P, As) The title compounds were prepared from stoichiometric mixtures o f the elements or from alkali metals (Na, K), NaX (KX) and MX (M = Al, In; X = P, As) at 1000 K. The crystal structures (Ibam, No. 72) are characterized by infinite chains o f edge sharing tetrahedra j, [MX4;,3'] (M = Al, In; X = P, As) which are isoelectronic to SiS2. The vibrational spectra can be interpreted with respect to the symmetry P(2/m 2/c) 42/ m -D 4h of the isolated polymeric chain ][M X 4(23"]. The assignment of the observed frequen­ cies is supported by a normal coordinate analysis using the fragment method. 
  Reference    Z. Naturforsch. 48b, 1027—1034 (1993); eingegangen am 29. März 1993 
  Published    1993 
  Keywords    Zintl Phases, Preparation, Crystal Structure, V ibrational Spectra, Force Constants 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1027.pdf 
 Identifier    ZNB-1993-48b-1027 
 Volume    48 
5Author    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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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1229.pdf 
 Identifier    ZNB-1999-54b-1229 
 Volume    54