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Microwave spectrum and DFT calculations of 4,4-dimethyl-1,3-dioxane

机译:4,4-二甲基-1,3-二恶烷的微波光谱和DFT计算

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摘要

In the microwave spectrum of 4,4-dimethyl-1,3-dioxane, the rotational transitions of a, b, and c types with J ≤ 54 are identified in the ground vibrational state of the molecule in the frequency range of 12 GHz to 37 GHz. Rotational constants, quartic centrifugal distortion constants, and the dipole moment of the molecule are determined. The revealed transitions are found to belong to the chair conformer. The B3PW91/aug-cc-pVDZ method is used to calculate the geometric parameters of 1,3-dioxane, 4-methyl-1,3-dioxane, and 4,4-dimethyl-1,3-dioxane. Alkyl substitution is shown to cause changes in the geometry of the 1,3-dioxane core.
机译:在4,4-二甲基-1,3-二恶烷的微波光谱中,在12 GHz至60 GHz的分子基态振动状态下,鉴定出J≤54的a,b和c类型的旋转跃迁。 37 GHz。确定了分子的旋转常数,四次离心畸变常数和偶极矩。发现所揭示的转变属于椅子构型者。 B3PW91 / aug-cc-pVDZ方法用于计算1,3-二恶烷,4-甲基-1,3-二恶烷和4,4-二甲基-1,3-二恶烷的几何参数。已显示出烷基取代会导致1,3-二恶烷核的几何形状发生变化。

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