The far-infrared spectrum of formamide (HCONH2) has been recorded at high resolution and over 9000 vibration-rotation lines assigned. Molecular parameters from the rovibrational analyses of the unperturbed 12(1)0 out-of-plane vibration band have been obtained for the ground state and the excited state. An analysis of the complicated resonance system between the 9(1)0, 11(1)0, and 12(2)0 bands has also been carried out. The mid-infrared spectrum of formamide has been recorded at low resolution and assignments for the fundamental, combination, and overtone bands in this region are given. The Large Amplitude Motion (LAM) of the out-of-plane mode has been reanalyzed using the new parameter set. Copyright 1999 Academic Press.

中文翻译：

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甲酰胺的高分辨率 FTIR 远红外光谱

甲酰胺 (HCONH2) 的远红外光谱已以高分辨率记录，并分配了 9000 多条振动旋转线。已经获得了基态和激发态的未受扰动 12(1)0 平面外振动带的振动分析的分子参数。还对 9(1)0、11(1)0 和 12(2)0 频带之间的复杂共振系统进行了分析。以低分辨率记录了甲酰胺的中红外光谱，并给出了该区域的基频、组合和泛音波段的分配。平面外模式的大振幅运动 (LAM) 已使用新参数集重新分析。版权所有 1999 学术出版社。