首页> 外文期刊>The Journal of Chemical Physics >STRUCTURE AND HYPERFINE PARAMETERS OF CYCLOPROPYL AND BICYCLOBUTYL RADICALS FROM POST-HARTREE-FOCK COMPUTATIONS
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STRUCTURE AND HYPERFINE PARAMETERS OF CYCLOPROPYL AND BICYCLOBUTYL RADICALS FROM POST-HARTREE-FOCK COMPUTATIONS

机译:哈特里-福克后计算的环丙基和双环丙基自由基的结构和超细参数

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Extensive post-Hartree-Fock calculations are reported for the geometrical structures and hyperfine parameters of cyclopropyl and bicyclobutyl radicals. Computations for the parent molecules, whose structures are experimentally well characterized, show that reliable geometrical parameters are obtained, especially for bicyclobutane, only when using sufficiently flexible basis sets including f functions on carbon. Isotropic hyperfine splittings obtained by purposely tailored basis sets, proper treatment of correlation, and inclusion of vibrational averaging effects are in remarkable agreement with experiment. Our results suggest a revision of the accepted assignment for bicyclobtyl radical and suggest that long-range couplings are not governed by the well-known W rule but rather by a syn rule. (C) 1996 American Institute of Physics. [References: 71]
机译:大量的Hartree-Fock后计算报告了环丙基和双环丁基自由基的几何结构和超精细参数。对母体分子的结构进行了实验性表征,结果表明,只有在碳上使用包括f函数的足够灵活的基集时,才能获得可靠的几何参数,特别是对于双环丁烷。通过有针对性的量身定制的基础集获得的各向同性超细分裂,适当处理相关性以及包含振动平均效应与实验有着显着的一致性。我们的结果表明对双环基自由基的可接受赋值进行了修订,并表明长距离偶联不受众所周知的W规则支配,而是由syn规则支配。 (C)1996年美国物理研究所。 [参考:71]

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