Dichlorido[6,8,22,24,34,36-hexamethyl-33,35-diaza-3,11,19,27-tetraazoniapentacyclo[27.3.1.1 5,9 .1 13,17 .1 21,25 ]hexatriaconta-1(33),5,7,9(34),13,15,17(35),21,23,25(36),29,31-dodecaene-κ 6N 3 , N 11 , N 19 , N 27 , N 33 , N 35 ]dipalladium(II) bis(perchlorate)