SiH stretching anharmonicity, local-mode behaviour and dissociation energies in silane and methyl silanes

✍ Scribed by D.C. Mckean; A.R. Morrisson; M.I. Kelly

• Book ID: 103027289
• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 372 KB
• Volume: 109
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(84)85599-2

✦ Synopsis

SiH stretching overtones have been studied in the infrared spectrum up to &J = 5 for SiH4, (CHalaSilla and (CHa)aSiH and for Au = 3 in CH$3iIIs. Tlx data for (CHs)2Si112 and (CI1~)3Sill necessitate a cubic term in the term value equation whose prcsencc can esplain the existing discordance between spectroscopically predicted and esperimental values of D&i-H) in methyl silancs. Earlier "lowl-mode" model predictions for the spectrum of Sill4 are accurate with respect to frequencies. but not to intensity. * DE,, is defined as the dissociation energy predicted by Biige-Sponer extrapolation from levels close to the potential minimum.