New confacial bioctahedral diplatinum(IV) complexes with 3-aminoalkanethiolate bridges

Abstract

Reaction of [(PtlMe3)4] with the cyclic 3-aminoalkanethiol HSCH(CH2CH2)2NMe, with the acyclic 3-aminoalkanethiol HS(CH2)3NMe2, or with the sodium salt of each of these thiols, under various stoichiometries in organic solvents gave the complexes Na[(PtMe3)2{µ-SCH(CH2CH2)2NMe}3], [(PtMe3)2{µ-SCH(CH2CH2)2NHMe}3]l2 and [(PtMe3)2{µ-S(CH2)3NHMe2}3]X2(X = l or BPh4). The complexes have been characterized by spectroscopic methods and the structures of two established by single-crystal X-ray diffraction. They consist of face-shared bioctahedral diplatinum(IV) complexes, in which the 3-aminothiolates function as bridging ligands through their sulfur atoms, to give a distorted-octahedral co-ordination of Pt with a fac-PtC3S3 configuration. In Na[(PtMe3)2{µ-SCH(CH2CH2)2NMe}3]·MeCN the nitrogen atoms of the ligands co-ordinate to the sodium cations to give a highly flattened trigonal-pyramidal geometry. In [(PtMe3)2{µ-S(CH2)3NHMe2}3][BPh4]2·MeCN the nitrogen atoms are protonated and take no part in co-ordination.