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Vibrational spectra and structure of zirconium and hafnium cyclopentadienyl hydrides
Authors:Z S Klemenkova  B V Lokshin  L I Strunkina  M Kh Minacheva
Institution:(1) A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 ul Vavilova, 117813 Moscow, Russian Federation
Abstract:Raman and IR spectra (4000-50 cm–1) of solid cyclopentadienyl zirconium and hafnium hydrides Cp2MH2, Cp2MD2, Cp2Zr(H)X, and Cp2Zr(D)X (Cp = eegr5-C5H5; M = Zr, Hf; X = Cl, Br) have been studied. The vibrational modes of MH groups, Cp-rings, and metal-ligand bonds are discussed and the band assignments are proposed. In the solid state, these complexes form polymers with linear hydride bridges of the M-H-M type. The force constants of the M-H and M-Cp bonds increase on going from Zr to Hf.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1604–1609, September, 1994.
Keywords:vibrational spectra  zirconium  hafnium  hydrides  cyclopentadienyl complexes
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