(1)均匀断裂(匀裂: homolytic cleavage): R R一coH≡R一coH_→+R+C=oH R R R (2)非均匀断裂(异裂: heterolytic cleavage): R-o-R→R ·O=R (3)半非均匀断裂(半异裂: hemiheterolytic cleavage): R::R!→R+·R"(1) 均匀断裂(匀裂:homolytic cleavage): C OH R 'R R'' C OH R 'R R'' C OH 'R ''R R + (2) 非均匀断裂(异裂:heterolytic cleavage): (3) 半非均匀断裂(半异裂:hemiheterolytic cleavage): R R' R + R' + R O R' R + O R' +