Pentaammines photochemistry

For the pentaammine complexes, [RuCNH jLI, when L is a vr-unsaturated ligand, such as pyridine, MLCT and intraligand -> ttJ bands dominate the absorption spectra. The photochemistry resulting from excitation into these MLCT bands is primarily substitutional, with pyridine labilization the major path in several solvents but with NH. labilization also seen ... 

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