The acceptor ability of the-B (OR) 2 group

O Exner, R Bose

Index: Exner,O.; Bose,R. Collection of Czechoslovak Chemical Communications, 1974 , vol. 39, p. 2234 - 2238

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Citation Number: 8

Abstract

Dipole moments of the cyclic boronic esters/-VI yielded the group mcment of 1· 9 D for the CB (OC) 2 grouping in the axially symmetrical, not deformed shape. Its direction from B to C arises from the contribution of the mesomeric formulation B. When the group is bonded to the aromatic nucleus, its moment is reduced by the mesomeric d pole moment of 0· 4 D. which originates in the mesomeric formula C. In the five-membered cycle structure the 0-B ...