3d-Metal derivatives of the [Cu I(SO 3) 4] 7- ion: Structure and magnetism

Abstract

The Cu(SO 3) 4 7- anion, which consists of a tetrahedrally coordinated Cu(i) centre coordinated to four sulfur atoms, is able to act as a multidentate ligand in discrete and infinite supramolecular species. The slow oxidation of an aqueous solution of Na 7Cu(SO 3) 4 yields a mixed oxidation state, 2D network of composition Na 5{[Cu II(H 2O)][Cu I(SO 3) 4]}·6H 2O. The addition of Cu(ii) and 2,2′-bipyridine to an aqueous Na 7Cu(SO 3) 4 solution leads to the formation of a pentanuclear complex of composition {[Cu II(H 2O)(bipy)] 4[Cu I(SO 3) 4]} +; a combination of hydrogen bonding and π-π stacking interactions leads to the generation of infinite parallel channels that are occupied by disordere..