Synthesis, crystal and molecular structure of bis(triethanolamine)nickel(II)dithiodisalicylate, [Ni(N(C2H4OH)3)][OOCC6H4SSC6H4COO]

A Ni(II) complex involving triethanolamine (tea) and disulphide of thiosalicylic acid (RSSR) was synthesised and the crystal structure of the complex was solved. The molecular formula is C26H38N2NiO10S2. The space group was found to be I2 with the following parameters a = 27.872(2), b = 9.016(2), c = 27.820(2) Å, β = 114.85(2)°, V = 6343.8 Å3, Z = 8, Dx = 1.38 g cm−3, μ = 0.739 mm−1. Final R was 0.102 and Rw = 0.106 for a total number of 2651 unique reflections with I> 3 σ(I). Molecular structure of the complex showed an octahedral coordination around Ni(II) with a NiN2O4 chromophore inkeeping with the observed magnetic moment (3.1 BM). The average Ni–N and Ni–O distances are 2.16(3), 2.06(3) and 2.11(2), 2.06(2) A respectively. One C2H4OH on each tea molecule is left uncoordinated. The disulphide moiety is acting as a counter ion and the average S–S distance is 2.077 Å. Eight molecules in the unit cell are held together by van der Waals forces. © by R. Oldenbourg Verlag, München 1987