AbstractBromination of binor‐S resulted in a mixture of products containing several pairs of isomers. Three major processes were found to be involved in the reaction mechanism, i.e., bromination, hydrobromination, and dehydrobromination. The structures of nine compounds derived from dibromide 6 were identified by spectroscopic methods. Yields between isomers were rationalized by comparison of their relative strain energies calculated by force field model (MM2). The crystal structures of a tribromide (9) and a pentabromide (15) were solved by X‐ray diffraction analyses. Their crystal packing patterns indicated the existence of attractive interactions among the bromine atoms.
Strained double bonds in two types of polycyclic hydrocarbons
作者:Chin-Chuan Wei、Tahsin J. Chow、Ya-Ping Yang、Yao-Jung Chen
DOI:10.1016/s0040-4020(01)80363-x
日期:1993.3
compounds 1 and 2 with pyramidalized double bond are prepared from their corresponding halides. Both of them are stable at ambient temperature but gradually transform to the epoxides upon exposing to air. Cycloaddition with either anthracene or cyclopentadiene yield the corresponding [4 + 2] adducts.
作者:Tahsin J. Chow、Yi-Lung Chen、Kuan-Jiuh Lin、Yu-Wen Wang、Chun-Lien Li
DOI:10.1002/jccs.199700008
日期:1997.2
AbstractBromination of binor‐S resulted in a mixture of products containing several pairs of isomers. Three major processes were found to be involved in the reaction mechanism, i.e., bromination, hydrobromination, and dehydrobromination. The structures of nine compounds derived from dibromide 6 were identified by spectroscopic methods. Yields between isomers were rationalized by comparison of their relative strain energies calculated by force field model (MM2). The crystal structures of a tribromide (9) and a pentabromide (15) were solved by X‐ray diffraction analyses. Their crystal packing patterns indicated the existence of attractive interactions among the bromine atoms.