Synthesis and Crystal Structures of Dinuclear Palladium and Mononuclear Nickel Complexes of Macrocyclic N8S4 Ligands
作者:Vasile Lozan、Berthold Kersting
DOI:10.1002/zaac.200700546
日期:2008.5
support the formation of coordinatively unsaturated Pd2 complexes and its use as a starting material for functionalized N8S4 systems. L1 represents a macrotricyclic ligand comprising four 4-tert-butyl-2,6-bis(aminomethyl)thiophenolate units, whose N and S atoms are linked by ethylene units. Treatment of L1 with [Pd(NCMe)2Cl2] produced the dinuclearcomplex [Pd2Cl2(H2L1)]4+, which was isolated as its pale-yellow
amine-thiophenolate ligands H46a and H46b. The macrocyclic compounds are versatile ligands for the preparation of polynuclear transition metal complexes. With divalent nickel H46a forms the di- and tetranuclear complexes [Ni2(6a)] (7) and [Ni4(6a)][ClO4]4 (8). Reaction of 8 with four equivalents of NH4SCN yields the novel isothiocyanate complex [Ni4II(6a)(NCS)4]·10MeCN (9). The structure consists of well-separated