Spectra and structure of silicon containing compounds. XXXII. Raman and infrared spectra, conformational stability, vibrational assignment and ab initio calculations of n-propylsilane-d0 and Si-d3
作者:James R. Durig、Chunhua Pan、Gamil A. Guirgis
DOI:10.1016/s1386-1425(02)00263-9
日期:2003.3
relative infrared and Raman spectral intensities, infrared band contours, depolarization ratios, and normal coordinate calculations. The geometrical parameters, harmonic force constants, vibrational frequencies, infrared intensities, Raman activities and depolarization ratios, and energy differences have been obtained for the anti and gauche conformers from ab initio MP2/6-31G(d) calculations. Structural
气态和固态正丙基硅烷,CH(3)CH(2)CH(2)SiH(3)和固体的正丙基硅烷的红外(3100-40 cm(-1))和拉曼光谱(3100-20 cm(-1)) Si-d(3)同位素,CH(3)CH(2)CH(2)SiD(3),已被记录。另外,已经记录了液体的拉曼光谱并获得了定性的去极化值。已经在流体相中鉴定了反构象和gauche构象异构体,但是只有反构象异构体保留在固体中。记录了溶解在液态k中的正丙基硅烷的红外光谱的可变温度(-105至-150摄氏度)研究,确定的焓差为220 +/- 22 cm(-1)(2.63 + / -0.26 kJ mol(-1))具有更稳定的形式。对于Si-d(3)同位素异构体的deltaH,获得了类似的234 +/- 23 cm(-1)(2.80 +/- 0.28 kJ mol(-1))值。在环境温度下,估计存在30 +/- 2%的薄纱构形物。已经从远红外光