Valence isomerization of cyclohepta-1,3,5-triene and its heteroelement analogues
نویسندگان
چکیده
The valence isomerization of the all-carbon and heteroelement analogues of cyclohepta-1,3,5-triene into the corresponding bicyclo[4.1.0]hepta-2,4-dienes is reviewed to show the impact of the heteroatom on the stability of both valence isomers. The focus is on the parent systems and their synthetic applications.
منابع مشابه
Response of semi-empirical and AB initio methods to angle strain and conjugation effects in (Z,Z,Z)-Cycloocta-1,3,5-triene
The results of MNDO, AM1 and PM3 semi-empirical calculations and HF/6-31G*, MP/6-31G*, MP2/6-311+G**, and B3LYP/6-311G** and QCISD/6-31G* ab initio methods for angle strain and conjugation effects in twist-boat, boat, and half-chair geometries of (Z,Z,Z)-cycloocta-1,3,5-triene indicate that all methods, except PM3, predict wrong ordering of the conformations.
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عنوان ژورنال:
دوره 7 شماره
صفحات -
تاریخ انتشار 2011