Tetraphenyldihydrocyclobutaarenes -: what causes the extremely long 1.72Å C-C single bond

被引:34
作者
Bettinger, HF
Schleyer, PV
Schaefer, HF
机构
[1] Univ Erlangen Nurnberg, Inst Organ Chem, Comp Chem Ctr, D-91054 Erlangen, Germany
[2] Univ Georgia, Ctr Computat Quantum Chem, Athens, GA 30602 USA
关键词
D O I
10.1039/a800741a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The exceptional 0.19 Angstrom lengthening (to 1.720 vs. 1.53 Angstrom in ethane) of the C-sp3-C-sp3 bond in tetraphenyl-dihydrocyclobutaarenes is attributed to a combination of cyclobutene ring strain (0.04 Angstrom), through-bond coupling (0.08 Angstrom) and steric repulsion (0.07 Angstrom) by comparison with model systems.
引用
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页码:769 / 770
页数:2
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