Copper bond dissociation energies

Examples of silver(l) alkyl and alkenyl (including aryl) complexes have been known from as early as 1941 6-9 however, the number of examples is fairly limited with respect to that of the heavier congeners, copper(l) and gold(l). Such a phenomenon can readily be attributed to the relatively low stability of this class of complexes, both photochemically and thermally. Simple homoleptic alkyl and alkenyl complexes of silver(i) are known to be very unstable under ambient temperature and light, and successful isolation of this class is fairly limited and mainly confined to those involving perfluoroorganics.10 The structures and the metal-carbon bond-dissociation energies for... 

NIR studies have been applied also to heteronuclear diatomics like CO and NO [95-97]. On alkali and alkaline earth cations the results are essentially similar to those obtained with homonuclear probes. In the case of CO and NO strengthening of the internal bonding is observed, caused by the withdrawal of electron density from slightly antibonding molecular orbitals in correspondence with quantum chemical calculations [70,72]. In spite of the uncertain Do determination on cobalt and copper ion-exchanged zeolites A the CO dissociation energy turns out to be decreased, which may be understood by backdonation of electronic charge into the carbonyl tt orbital [97,98]. 

Some of the few complete sets of enthalpies for binary fluorides are collected in Tables XVIII and XIX. The inversion in dissociation heats for copper and beryllium fluorides can be associated with the closed-shell configurations of Be2+ and Cu+. The alternations in bond energies... 

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