Synthesis and Pd(II) binding studies of octasubstituted alkyl thio derivatised phthalocyanines

Synthesis and characterization of non-peripherally (4,5) and peripherally (6,7) substituted metal free and Pd octapentylthiophthalocyanine and coordination of palladium ions to these Pcs are reported. The unmetalated complexes (4 and 6) show Pd coordination at the central metal and at the ring. The number of Pd ions bound to complex 4 were found to be five and to complex 6 were three. The equilibrium constant for the binding of Pd to complexes 4 was lower (K = 1.2 × 109 dm3 mol−1) than for complex 6 (K = 5.7 × 1010 dm3 mol−1)