Thiocarbonyl spectroscopy: the infrared spectrum and ab initio vibrational frequencies of cis- and trans-dithioformic acid in the X̃1A′ ground state
作者:F. Ioannoni、D.C. Moule、J.D. Goddard、D.J. Clouthier
DOI:10.1016/0022-2860(89)85159-2
日期:1989.6
Abstract The low resolution infrared (3100-475 cm −1 ) spectra of the unstable molecule dithioformic acid, HCSSH, and its monosubstituted isotopomer, dithioformic acid-d 1 , DCSSH, have been recorded in the gas phase. The spectra are interpreted in terms of an equilibrium between two geometric isomers. Vibrational assignments are based on infrared band contours, stop—flow techniques and vibrational
摘要 在气相中记录了不稳定分子二硫代甲酸 HCSSH 及其单取代同位素二硫代甲酸-d 1 的低分辨率红外 (3100-475 cm -1 ) 光谱。根据两种几何异构体之间的平衡来解释光谱。振动分配基于红外波段轮廓、停止流动技术和振动频率,这些振动频率从在 6–31G* SCF 水平执行的 ab initio 计算得出。势能计算表明,反式构象异构体相对于顺式物质稳定了 479 cm -1 (1370 cal)。