Ruthenium(II) ligated to tetradentate diaminodithioethers: synthesis, characterisation and electrochemistry

Ruthenium(II) complexes containing two tetradentate ligands, 1,2-bis(o-aminophenylthio)ethane (L-1) and 1,2- (o-aminophenylthio)xylene (L-2), have been prepared. The complexes, which are of the type Ru(L)Cl-2 [L = L-1 (1);/L-2(2)], [Ru(L)(PPh3)Cl]Cl [L = L-1 (3); L-2 (4)] and [Ru(L)(bpy)](PF6)(2) [L = L-1 (5);/L-2 (6)], were characterised by elemental analysis, i.r., u.v.-vis. and n.m.r. spectroscopy and their electrochemical behaviour has been examined by cyclic voltammetry using a glassy carbon working electrode and an Ag/AgCl electrode as the reference electrode.