the first time. Infrared spectra were recorded in the vapour, amorphous and crystalline solid phases in MIR and FIR regions. Additional MIR spectra of the compound isolated in argon and nitrogen matrices were obtained at 5 K. Ramanspectra of the liquid, excited by argon and by Nd 3+ YAG lasers, were recorded at room temperature including polarization measurements. The spectra were studied in an extended
摘要 首次合成了乙基碘硅烷(CH 3 CH 2 –SiH 2 I)。在 MIR 和 FIR 区域的蒸汽、非晶态和结晶固相中记录了红外光谱。在氩气和氮气基质中分离的化合物的其他 MIR 光谱在 5 K 下获得。在室温下记录由氩气和 Nd 3+ YAG 激光器激发的液体的拉曼光谱,包括偏振测量。光谱在 173-353 K 的扩展温度范围内进行研究,获得了 1.2±0.3 kJ mol -1 的 Δ H 值,其中 gauche 是低能量构象异构体。在液氮温度下获得无定形和结晶固体的光谱。乙基碘硅烷以气态、液态和非晶态存在于反构象异构体和高切构象异构体之间的平衡状态。在冷Cu指(拉曼)或CsI或Si窗口(红外)上将无定形固体仔细退火至160 K后,形成部分结晶固体。许多 IR 和拉曼谱带在退火后强度降低,尽管它们并没有完全消失。从观察到的和计算出的振动模式之间的比较很明显,晶体中存在 gauche