Chemistry Letters, Vol.38, No.12, 1168-1169, 2009
A Novel Tridentate-N,N,S Iminothiolate Ligand That Leads to the Formation of S-Bridged Dinickel(II) and Tetracobalt(III) Structures
Treatment of dicyandiamide, 2-aminoethanethiol hydrochloride, and NiCl2 center dot 6H(2)O in water gave an S-bridged dinickel(II) complex, [Ni-2(L)(2)]Cl-2 ([1]Cl-2), which contains novel tridentate-N,N,S iminothiolate ligands with a biguanide moiety (L-). Another S-bridged complex containing L-, [Co{Co(L)(2)}(3)](6+) ([2]Cl-6), which has the first example of a hexol S-bridged structure, was obtained by the stepwise reaction of [1]Cl-2 with Na(4)edta and CoCl2 center dot 6H(2)O in water.