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

Abstract

The structure of bis[N,N-bis(3-aminopropyl)methylamine]-1κ 3 N,2κ 3 N-di-μ-thiocyanato-1:2κ 2 N:S;1:2κ 2 S:N-dithiocyanato-κN,2κN-dinickel(II), [Ni 2 (NCS) 4 (C 7 H 19 N 3 ) 2 ] or [Ni 2 (μ-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 non-bridging thiocyanate ligand, and one N and one S atom of two bridging thiocyanate ligands. The six-membered chelate rings display chair conformations.