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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Validation of a Database of Formation Enthalpies and of Mid-Level Model Chemistries
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Validation of a Database of Formation Enthalpies and of Mid-Level Model Chemistries

机译:验证形成焓和中级模型化学数据库

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In order to test new procedures for the calculation of basic molecular properties, a properly validated database and computational method appropriate to the range of species at hand is essential. Here formation enthalpies of chemical species CmHnNpOq from their constituent atoms are computed by midlevel composite model chemistries in order to check the contents of the best established and most accurate database, ATcT. Once discrepancies are identified alternative independent procedures and/or higher level model chemistries, which include CCSDT(Q) calculations, are employed to resolve the problems. Shortcomings of the midlevel methods used are signaled where these occur. In addition a more visual statistical analysis than is usual is presented which highlights the outliers and identifies the bias of each method together with associated error bars and the 95% limits of agreement and its error bars.
机译:为了测试用于计算基本分子特性的新程序,必须有一个适当验证的,适合于手头物种范围的数据库和计算方法。在这里,中层复合模型化学计算了化学物种CmHnNpOq从其构成原子的形成焓,以便检查建立最完善,最准确的数据库ATcT的内容。一旦发现差异,就可以采用替代的独立程序和/或更高级别的模型化学方法(包括CCSDT(Q)计算)来解决问题。在发生这些错误时,会标出所使用的中级方法的缺点。此外,还提供了比平时更直观的统计分析,突出了异常值,并识别了每种方法的偏差以及相关的误差线以及一致性的95%限制及其误差线。

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