Functional nickel thiosalen complexes: structure and solid-state packing of a transition metal-based surfactant

The complex NiBr2(2-C12H25SC6H4CH=NCH2CH2N=CHC6H4SC12H25-2) (1) was prepare d from the ligand 2-C12H25SC6H4CH=NCH2CH2N=CHC6H4SC12H25-2 (3) and NiBr2. P aramagnetic 1 was characterized by combustion analyses, H-1 and C-13 NMR sp ectroscopy, Vis-NIR spectroscopy, measurement of its magnetic susceptibilit y, and single-crystal X-ray diffraction. The crystal structure of 1 feature s octahedral coordination of Ni(II) with axial bromides and fully extended interdigitated alkyl chains. There are significant differences between the solid state structures of 1 and NiBr2(2-C6H12SC6H4CH=NCH2CH2N=CHC6H4SC6H12- 2) (2), a previously reported homologue. (C) 2001 Elsevier Science B.V. All rights reserved.