Synthesis, Fourier-transform Raman and infrared spectroscopic analysis, and crystal structure of (NiL)2, (L = bis(2,4-dimethyldipyrrin-3-yl)methane)

The Ni(II) complex with bis(2,4-dimethyldipyrrin-3-yl) methane, (NiL)(2), has been synthesized and characterized by H-1-NMR, UV-Vis, FT-IR, FT-Raman, MS, and elemental analysis. X-ray diffraction analysis at room temperature indicates that the complex crystallizes in triclinic system, space group P - 1 with a = 11.344( 4), b = 12.703( 4), c = 14.936( 5) Angstrom, alpha = 87.017(6) degrees, beta = 75.379(5) degrees, gamma = 75.318(5)degrees, M-r = 826.31, V = 2014.5(11) Angstrom(3), Z = 2. The crystal structure of the title complex reveals that it is a dinuclear double-stranded helical entity. The ligands perform as tetradentate ligands and the ratio of Ni( II) to ligand is 2: 2. The central Ni( II) atom is tetracoordinated by four nitrogen donors of two ligands and the coordination geometry of Ni( II) can be considered as a distorted tetrahedron configuration. The IR and Raman spectral analysis, assignment, and discussion are presented.