Silylene singlet-triplet energy difference

Substituents effect dramatically also the bond dissociation energies of disilenes to the corresponding silylenes (Eq. 1), as is shown in Fig 12. which describes the correlation of the calculated dissociation energies for a series of substituted disilenes vs the sum of the singlet-triplet energy differences in the corresponding silylenes [20]. The theoretical background for the existence of such a correlation is discussed elsewhere [21]. 

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