Microwave, infrared, and Raman spectra, structure, and normal coordinate analysis of ethylstannane‐d0 and ethylstannane‐d3
| Autor: | C. B. Bradley, Y. S. Li, J. S. Church, J. F. Sullivan, James R. Durig |
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| Rok vydání: | 1983 |
| Předmět: | |
| Zdroj: | The Journal of Chemical Physics. 78:1046-1058 |
| ISSN: | 1089-7690 0021-9606 |
| DOI: | 10.1063/1.444905 |
| Popis: | The microwave spectra of CH3CH2SnH3 and CH3CH2SnD3 for the five most abundant isotopes of naturally occurring tin, 116Sn, 117Sn, 118Sn, 119Sn, and 120Sn, have been recorded in the range 18.0–40.0 GHz. Only a‐type transitions were identified and R‐branch assignments have been made for the ground vibrational state. The components of the dipole moment were determined from the Stark effect to be ‖μa‖=0.86±0.01 D, ‖μb‖=0.48±0.04 D, and ‖μt‖=0.99±0.02 D. No splittings in the ground state were observed due to the internal rotation of either the SnH3 or CH3 tops. Based on this observation, lower limits to the barriers to internal rotation of 1.12 and 2.12 kcal/mol are estimated for the SnH3 and CH3 tops, respectively. The following five structural parameters were determined from a least‐squares fit of the 20 rotational constants (B and C only): r(Sn–C)=2.143±0.003 A; r(C–C) =1.552±0.025 A; ∢HSnC=109.5±0.1°; ∢HCH=107.5±3.9°; ∢SnCC=112.6±0.9°. The Raman spectra (3200–10 cm−1) were obtained for all three phases and ... |
| Databáze: | OpenAIRE |
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