Synthesis and crystal structure of [Co(mpt)2{P(OCH3)3}2]BF4 (Hmpt = 2-mercaptothiazoline)

The monomeric cobalt-phosphite-thiolato complex [ Co (mpt)2 {P (OCH3 )3 }2 ] BF4 (Hmpt = 2-mercaptothiazoline) has been prepared and characterized by X-ray crystallography. The complex crystallizes in the monoclinic space group C2/c with a = 0.8078(5), b = 2.6020(18), c= 1.2191(7) nm, β= 99.38 (1)°, V = 2.528(3) nm3, and Z = 4. The structure comprises discrete cations [Co (mpt)2(P(OCH3)3}2] + and anions BF4−, in which the cobalt (III) atom is coordinated to two chelate mpt− and two cis-oriented monodentate P(OCH3)3 ligands in a highly distorted octahedral geometry. The most distorted angles are S(2)-Co(1)-S(2a) of 162.23(10)° and N (l)-Co(1)-S(2) of 71.47 (13)°, the latter is caused by the geometric constraint of the bidentate ligand mpt−. Cyclic voltammetry has been used to study the electrochemical behavior of the title complex on the Pt electrode in MeCN solution with 0.1 mol · L−1 of Bu4n NBF4 89 electrolyte, The dts indicate that the title complex is unstable in MeCN.