Bis(O2S2 macrocycle) complexes of palladium(II)

Two isomeric O2S2 macrocycles L1 and L2 were synthesised and their coordination chemistry towards Pd(II) was investigated. Two-step approaches via reactions of 1:1 complexes, [cis-Cl2LPd] (1a: L = L1, 1b: L = L2), with different macrocycles led to the isolation of the following bis(O2S2 macrocycle) Pd(II) complexes: [Pd(L1)2](ClO4)2 (2a) and a mixture of [Pd(L1)2](ClO4)2 (2a) + [Pd(L2)2](ClO4)2(2b).