A method has been devised to prepare CF2 = CD2 and CF2 = CHD. The infrared spectra of the gaseous compounds and the Raman spectra of the liquids have been determined. The observed frequencies have been assigned to the fundamental modes of vibration and to overtones and combinations. The torsional frequency has been estimated as ca 720 and ca 520 cm—1 in CF2 = CH2 and CF2 = CD2, respectively. The overtone of the torsional frequency interacts with the CH2 or the CD2 deformation fundamental and this is the cause of the anomalous results with the product rule.
对于醇作为氢键中的质子供体的情况,已经检查了包含 D-C-O-H 官能团的伯醇和仲醇中 C-D 振动拉伸频率的变化。CD 伸缩频率是由 Hartree-Fock 计算确定的 H 键形成焓的函数,每千卡/摩尔降低约 5 cm-1。这种频率的降低归因于随着 H 键的加强,OH 键合电子与 CD 反键轨道的重叠增加。以水溶液中[1-D]三氟乙醇和[1-D]三氟乙醇盐的拉曼光谱为例;酒精有两个独立的 CD 拉伸,相差 45 cm-1,去质子化导致 CD 拉伸频率平均降低 78 cm-1。