首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Millimeter Wave Spectrum of the Weakly Bound Complex CH2=CHCN center dot H2O: Structure, Dynamics, and Implications for Astronomical Search
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Millimeter Wave Spectrum of the Weakly Bound Complex CH2=CHCN center dot H2O: Structure, Dynamics, and Implications for Astronomical Search

机译:弱约束复合物CH2 = CHCN中心点H2O的毫米波谱:结构,动力学和对天文搜索的意义

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摘要

The weakly bound 1:1 complex between acrylonitrile (CH2=-CHCN) and water has been characterized spectroscopically in the millimeter wave range (59.6-74.4 GHz) using a Free Jet Absorption Millimeter Wave spectrometer. Precise values of the rotational and quartic centrifugal distortion constants have been obtained from the measured frequencies of the normal and isotopically substituted water moiety (DOH, DOD, (HOH)-O-18). Structural parameters have been estimated from the rotational constants and their differences among isotopologues: the complex has a planar structure with the two subunits held together by a O-H center dot center dot center dot N (2.331(3) angstrom) and a C- H center dot center dot center dot O (2.508(4) angstrom) interaction. The ab initio intermolecular binding energy, obtained at the counterpoise corrected MP2/aug-cc-pVTZ level of calculation, is D-e = 24.4 kJ mol(-1)
机译:丙烯腈(CH2 = -CHCN)与水之间的弱结合1:1络合物已通过使用Free Jet吸收毫米波光谱仪在毫米波范围(59.6-74.4 GHz)中进行了光谱表征。旋转和四次离心畸变常数的精确值已从正常和同位素取代的水部分(DOH,DOD,(HOH)-O-18)的测量频率中获得。结构参数已根据旋转常数及其在同位素之间的差异进行了估算:配合物具有平面结构,两个子单元由OH中心点中心点中心点N(2.331(3)埃)和C-H中心保持在一起点中心点中心O(2.508(4)埃)相互作用。在计算平衡的MP2 / aug-cc-pVTZ计算水平下获得的从头算分子间结合能为D-e = 24.4 kJ mol(-1)

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