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dc.contributor.author | Fedorenko V. | |
dc.contributor.author | Zverev V. | |
dc.contributor.author | Shtyrlin Y. | |
dc.contributor.author | Shaikhutdinova G. | |
dc.contributor.author | Klimovitskii E. | |
dc.date.accessioned | 2018-09-17T21:25:26Z | |
dc.date.available | 2018-09-17T21:25:26Z | |
dc.date.issued | 2002 | |
dc.identifier.issn | 1070-3632 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/134972 | |
dc.description.abstract | According to semiempirical AM1 calculations, the stability of the boat and twist forms of 2-R-1,3-dioxacyclohept-5-enes depends on the size of substituents at the acetal carbon atom. The twist form gives diastereomeric H complexes with chloroform and methanol of the cis and trans structure, containing monocentered hydrogen bonds, whereas the chair conformation preferably forms complexes with a two-centered hydrogen bond. Based on theoretical data (Γ<inf>OH</inf>, ΔH, geometry of complexes), the specific features of H complexes of the conformers in electrophilic addition and cycloaddition were revealed. Considerable preferableness of the exo attack of the diastereotopic double bond in the H complex having the chair form is due to the steric accessibility of the exo side, whereas in the complexes of the twist form the facial selectivity is appreciably lower. | |
dc.relation.ispartofseries | Russian Journal of General Chemistry | |
dc.title | Stereochemistry of seven-membered heterocycles: XLII. A theoretical study of stereochemistry of H complexes formed by conformationally nonuniform 2-R-1,3-dioxacyclohept-5-enes with some proton donors | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 7 | |
dc.relation.ispartofseries-volume | 72 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 1107 | |
dc.source.id | SCOPUS10703632-2002-72-7-SID0036031859 |