Carbonyl metal ion complexes

Thus, the unknown values of i ed and AGf can be determined from the intercept and slope of the linear plots of (AG /e) versus (LGtJey as shown in Fig. 9. The °red values of various metal ion-carbonyl complexes thus obtained are summarized in Table 2 [113,114]. The °rea values of the triplet excited states are obtained by adding the triplet excitation energies and are listed in Table 2. 

Remarkable positive shifts of the °red values of the singlet excited states of the metal ion-carbonyl complexes as compared to those of the triplet excited states of uncomplexed carbonyl compounds (Table 2) result in a significant increase in the redox reactivity of the Lewis acid complexes versus uncomplexed carbonyl compounds in the photoinduced electron-transfer reactions. For example, photoaddition of benzyltrimethylsilane with naphthaldehydes and acetonaphthones proceeds efficiently in the presence of Mg(C104)2 in MeCN, although... 

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