Vibrational and electronic spectra of tetrahedral molecules (Me3M)(4)M ' (M = Si, Sn; M ' = Si, Ge) with heteronuclear M-M ' bonds

Authors
Leites, LA Bukalov, SS Garbuzova, IA Lee, VY Baskir, EG Egorov, MP Nefedov, OM
Citation
La. Leites et al., Vibrational and electronic spectra of tetrahedral molecules (Me3M)(4)M ' (M = Si, Sn; M ' = Si, Ge) with heteronuclear M-M ' bonds, J ORGMET CH, 588(1), 1999, pp. 60-68
Citations number
44
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF ORGANOMETALLIC CHEMISTRY
ISSN journal
0022328X → ACNP
Volume
588
Issue
1
Year of publication
1999
Pages
60 - 68
Database
ISI
SICI code
0022-328X(19991001)588:1<60:VAESOT>2.0.ZU;2-N
Abstract
Raman, infrared and UV spectra of tetrahedral molecules (Me3Si)(4)Ge (I), ( Me3Sn)(4)Ge (II), and (Me3Sn)(4)Si (III) were obtained. To assign and analy ze vibrational modes, model normal coordinate calculations for (C3M)(4)M' m oieties were carried out. Stretching vibrations of heteronuclear tetrahedra M4M' were studied comparatively. Solid substances I-III were found to unde rgo an order-disorder phase transition between an ordered crystalline phase and a plastic mesophase (II and III on heating to ca. 65 degrees C while I on cooling to ca. -45 degrees C). (C) 1999 Elsevier Science S.A. All right s reserved.