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BAC-MP4 predictions of thermochemistry for gas-phase tin compounds in the Sn-H-C-Cl system

机译:BAC-MP4对Sn-H-C-Cl系统中气相锡化合物热化学的预测

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摘要

In this work, the BAC-MP4 method is extended for the first time to compounds in the fourth row of the periodic table, resulting in a self-consistent set of thermochemical data for 56 tin-containing molecules in the Sn-H-C-Cl system. The BAC-MP4 method combines ab initio electronic structure calculations with empirical corrections to obtain accurate heats of formation. To obtain electronic energies for tin-containing species, the standard 6-31G(d,p) basis set used in BAC-MP4 calculations is augmented with a relativistic effective core potential to describe the electronic structure of the tin atom. Both stable compounds and radical species are included in this study. Trends within homologous series and calculated bond dissociation energies are consistent with previous BAC-MP4 predictions for group 14 compounds and the limited data available from the literature, indicating that the method is performing well for these compounds.
机译:在这项工作中,BAC-MP4方法首次扩展为元素周期表第四行中的化合物,从而获得了Sn-HC-Cl系统中56个含锡分子的一组一致的热化学数据。 BAC-MP4方法将从头算起的电子结构计算与经验校正相结合,以获得准确的地层热量。为了获得含锡物质的电子能量,BAC-MP4计算中使用的标准6-31G(d,p)基集增加了相对论有效核心电位,以描述锡原子的电子结构。这项研究包括稳定的化合物和自由基种类。同源序列内的趋势和计算出的键解离能与先前对第14组化合物的BAC-MP4预测以及从文献中获得的有限数据一致,表明该方法对这些化合物表现良好。

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