Abstract
Nickel(II) complexes of tridentate ligands bis(2-benzimidazolyl) methyl) ether, sulphide and their N-butyl derivatives have been synthesized and characterized. The 1H NMR spectra of nickel(II) complexes depict dipolar broadened, isotropically contact shifted resonances in the range of +0.7 to +53.0 ppm, typical of high spin nickel(II), while 13C NMR spectra have resonances in the range of +98.0 to +278.0 ppm with respect to TMS. The sign of the shifts is indicative of dominant σ-spin delocalization mechanism. The present contact shift data also reveal that the benzimidazole ring protons experience an equivalent ligand field environment, indicating a plane or C 2 axis of symmetry in the molecules. The stoichiometry of the present complexes is suggestive of five-coordinate geometry in the solid state. However, the presence of an electronic absorption band in the region ⩾25,000 cm −1 is indicative of a six-coordinated tetragonal complex in solution.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
