首页> 外文期刊>Chemistry: A European journal >Contributions from Atomic p(Se), d(Se), and f(Se) Orbitals to Absolute Paramagnetic Shielding Tensors in Neutral and Charged SeHn and Some Oxides Including the Effect of Methyl and Halogen Substitutions on sigma(P)(Se)
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Contributions from Atomic p(Se), d(Se), and f(Se) Orbitals to Absolute Paramagnetic Shielding Tensors in Neutral and Charged SeHn and Some Oxides Including the Effect of Methyl and Halogen Substitutions on sigma(P)(Se)

机译:原子p(Se),d(Se)和f(Se)轨道对中性和带电SeHn中的绝对顺磁屏蔽张量和某些氧化物的贡献,包括甲基和卤素取代对sigma(P)(Se)的影响

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Contributions from atomic p(Se). d(Sc), and f(Se) orbitals to sigma(p)(Se) are evaluated for neutral and charged Se*H-n (* = null, +, or -) and some oxides to build the image of the contributions. The effect of methyl and halogen substitutions is also examined employing R,Se*XxOo (*=null, +, or -) where R=H or Me: X=F, Cl, or Br. The p(Se) contributions are larger than 96% for SeH- (C-xv), SeH2 (C-2v), SeH3+ (C-3v), SeH3+ (D-3h), and SeH4 (T-d). Therefore. sigma(p)(Se) of these compounds can be analyzed based on p(Se). The p(Se) contributions are 79-75% for SeH4 (TBP), SeH5 (TBP), SeH5+ (SP), and SeH5 (SP). Methyl and halogen substitutions increase the contributions by 1-2% (per Me) and 4-7% (per X). respectively. The contributions are 92-79% for H2SeO (C-s), H2SeO2 (C-2v) and H4SeO (C-2v). The values are similarly increased by the substitutions. Consequently. sigma(p)(Sc) of these compounds can be analyzed based on p(Se) with some corrections by d(Se). The p(Se) contribution of SeH6 (O-h) is 52%: sigma(p)(Se: SeH6 (O-h)) must be analyzed based on both p(Se) and d(Se). The contributions for the Me and X derivatives of SeH6 amount to 86-77%. Therefore. sigma(p)(Se) of the derivatives can also be analyzed mainly based on p(Se) with some corrections by d(Se). Contributions from f(Sc) are negligible. Contributions from 4p(Se) in vacant orbitals are also considered. A utility program derived from the Gaussian 03 (NMRANAL-NH03G) is applied to evaluate the contributions.
机译:来自原子p(Se)的贡献。评估d(Sc)和f(Se)到sigma(p)(Se)的轨道的中性和带电Se * H-n(* = null,+或-)和一些氧化物,以建立贡献的图像。还使用R,Se * XxOo(* =空,+或-)(其中R = H或Me:X = F,Cl或Br)检查甲基和卤素取代的作用。对于SeH-(C-xv),SeH2(C-2v),SeH3 +(C-3v),SeH3 +(D-3h)和SeH4(T-d),p(Se)贡献大于96%。因此。这些化合物的sigma(p)(Se)可以基于p(Se)进行分析。 SeH4(TBP),SeH5(TBP),SeH5 +(SP)和SeH5(SP)的p(Se)贡献为79-75%。甲基和卤素取代将贡献增加1-2%(每Me)和4-7%(每X)。分别。对于H2SeO(C-s),H2SeO2(C-2v)和H4SeO(C-2v)的贡献为92-79%。通过替换类似地增加值。所以。可以基于p(Se)分析这些化合物的sigma(p)(Sc),并通过d(Se)进行一些校正。 SeH6(O-h)的p(Se)贡献为52%:必须基于p(Se)和d(Se)分析sigma(p)(Se:SeH6(O-h))。 SeH6的Me和X衍生物的贡献为86-77%。因此。导数的sigma(p)(Se)也可以主要基于p(Se)进行分析,并通过d(Se)进行一些校正。 f(Sc)的贡献可忽略不计。还考虑了空轨道中4p(Se)的贡献。应用源自高斯03(NMRANAL-NH03G)的实用程序来评估贡献。

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