Metal directed one-pot syntheses: Mono-, di- and tetra-nuclear clusters [1]

Abstract

Upon reaction of HL1 1 (picoline-tetrazolylamide) with cobalt(II) acetate under aerobic conditions or with copper(II) acetate, the mono-nuclear complex [Co-III(L-1)(3)] 3 and the di-nuclear complex [Cu-2(L-1)(4)] 4 were generated. In 3 and 4, (L-1)(-) exclusively coordinates across its nitrogen donors. However, when HL2 5 (picoline-tetrazolylthioamide) was reacted with copper- or nickel acetate, the di-nuclear cluster [Cu-2(L-2)(4)] 6 and the tetra-nuclear cluster [Ni-4(L-2)(8)] 7, respectively, were isolated. Contrary to 3 and 4, in 6 and 7, (L-2)- also coordinates across sulfur.