The ν3+ν8 combination band of H2CCS and the CâD ν1 stretching fundamentals of HDCCS and D2CCS in the gas phase have been investigated by high-resolution FTIR spectroscopy. All upper vibrational levels were perturbed. This investigation has yielded accurate values for the ground-state A rotational constant for all three isotopomers and this has enabled the positions of the hydrogen nuclei to be precisely fixed in an rs structure. In addition, the fundamental frequencies for all three isotopomers from both low- and high-resolution spectra are presented.
通过高分辨率傅里叶变换红外光谱法,研究了气相中H2CCS的ν3+ν8组合带以及H
DCCS和D2CCS的CâD ν1伸缩基频。所有上振动能级都受到了扰动。这项研究获得了所有三个同位素变体基态A转动能常数的准确值,这使得氢核在rs结构中的位置能够被精确确定。此外,从低分辨率和高分辨率光谱中,还展示了所有三个同位素变体的基频。