A dimeric form of the nickel(II) thiocyanate complex of bis(3-aminopropyl)-methylamine

The structure of bis[N,N-bis(3-aminopropyl)methylamine]-1 kappa(3)N,2 kappa(3)N-di-mu-thiocyanato-1:2 kappa(2)N:S;1:2 kappa(2)S:N-dithiocyanato-1 kappa N,2 kappa N-dinickel(II), [Ni-2(NCS)(4)(C7H19N3)(2)] or [Ni-2(mu-SCN)(2)(medpt)(2)(NCS)(2)], where medpt is bis(3-aminopropyl)methylamine, consists of two crystallographically independent dimer types differing in their orientations. In each dimer, the two Ni-II ions are bridged by two SCN- ligands in an end-to-end fashion. The coordination polyhedra about the Ni-II atoms are distorted octahedra consisting of three N atoms of the medpt ligand coordinating meridionally, one N atom of the nonbridging thiocyanate ligand, and one N and one S atom of two bridging thiocyanate ligands. The six-membered chelate rings display chair conformations.