Polynuclear cyclometallated palladium (II) complexes derived from potentially hexadentate Schiff base ligands. Crystal structures of [(Cl)Pd{Me2NCH2CH2N(H)C}C6H2{C(H)NCH2CH2NMe2}Pd(Cl)] and [{(Ph2PCH2CH2)2PPh-P,P,P}Pd{Me2NCH2CH2N(H)C}C6H2{C(H)NCH2CH2NMe2}Pd{(Ph2PCH2CH2)2PPh-P,P,P}][Cl]2