The molecular structure of 1,3,5- tris (trimethylstannyl) benzene has been determined by gas-phase electron diffraction. The C — C bond length is in good agreement with that in benzene. In agreement with the somewhat electron-releasing character of the substituents, the endocyclic bond angles at the substituents are somewhat smaller than 120°. The mean value of Sn — C bond lengths is greater than that in tetraphenyltin and tetramethyltin. The SnMe₃ groups appear freely rotating around the C_aryl — Sn bonds. The following bond lengths ( r _g) and bond angles were determined: (Sn — C)_mean 2.150 ± 0.007 Å, C — C 1.399 ± 0.005 Å, (C — H)_mean 1.105 ± 0.006 Å, < C — C(Sn) — C 117.7 ± 1.7º, < C_aryl — Sn — C_methyl 106.7 ± 0.7º < Sn — C — H 111.5 ± 0.9º.

中文翻译：

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1,3,5- 三 （三甲基锡烷基）苯的分子结构 ：电子衍射研究

1,3,5- 三（三甲基锡 烷基）苯的分子结构 已通过气相电子衍射法确定。C-C键的长度与苯中的键长非常吻合。与取代基的某种电子释放特征一致，在取代基上的内环键角略小于120°。Sn-C键长的平均值大于四苯基锡和四甲基锡。SnMe ₃基团绕C_芳基-Sn键自由旋转。确定以下键长（ r _g）和键角：（Sn-C）_均值2.150±0.007Å，C-C 1.399±0.005Å，（C-H）_均值1.105±0.006Å，<C C（Sn）-C 117.7±1.7º，<C_芳基-Sn -C_甲基106.7±0.7º<Sn-C-H 111.5±0.9º。