Water soluble (η6-arene) ruthenium(II) complexes incorporating marine derived bioligand: Synthesis, spectral and structural studies

A series of water soluble compounds of general formula [{(η6-arene)Ru(HMP)Cl}], [η6-arene=η6-cymene (1), η6-HMB (2), η6-C6H6 (3); HMP=5-hydroxy-2-(hydroxymethyl)-4-pyrone] have been prepared by the reaction of [{(η6-arene) RuCl2}2] with HMP. The complexes 1 and 2 react with NaN3 to give in excellent yield tetra-azido complexes [{(η6-arene)Ru(μN3)N3}2] (arene=cymene 4, HMB=5) but similar reaction of complex 3 with NaN3 yielded di-azdo complex …