Cu-X bonds

The broken bonds (boldface=dissociated fregment) BDEs (boldface — recommended data reference in parentheses) Methods References 

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The data for these compounds can be found in Tables 27 and 28 173). The frequencies for TI3MX4, where M is V, Nb or Ta and X is S or Se, can readily be taken from Table 22. In every case the chalcogen-metal vibrations are markedly decreased. The compounds such as CU3MX4 where M is V, Nb or Ta and X is S or Se form a three dimensional crosslinked network due to strong Cu—X bonding. The coppermetaUates crystallize in the sulvanite form. 

The formation and aquation reactions of [Cu(tet 6)X(blue)] proceed via an I, mechanism. Considerable Cu-X bond formation has developed in the transition state for the formation reaction and only very limited Cu-X bond dissociation has developed in the transition state of the aquation reaction. 

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