General synthetic methods are presented for neutral and anionic phenylcyanamide ligands and their pentaammineruthenium(III) complexes. A spectroscopic analysis of the complexes, in C2V microsymmetry, details the origin of the ligand to metal charge-transfer bands observed in aqueous solution. For [Ru(NH3)5(2,3-Cl2Hpcyd)]3+, the LMCT band at 487 nm is assigned to an allowed b2←b2 transition. For [Ru(NH3)5Ru(2,3-Cl2 pcyd)]2+, the LMCT transitions at 356 and 629 nm are assigned to forbidden b1←b2 and allowed b1← b1 transitions, respectively.

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Journal Inorganic Chemistry
Crutchley, R, & Naklicki, M.L. (Mark L.). (1989). Pentaammineruthenium(III) complexes of neutral and anionic (2,3-Dichlorophenyl)cyanamide: Spectroscopic analysis of ligand to metal charge-transfer spectra. Inorganic Chemistry, 28(10), 1955–1958.