Preparation, crystal structures and NMR characterization of substituted-benzoate complexes Nickel(II)-N3-macrocycles

Substituted-benzoate complexes of nickel(II) of the types bidentate [Ni(mcN3)(Bz)](PF6) and monodentate [Ni(mcN3)(Bz)(H2O)](PF6) have been prepared by acid-base reaction between the hydroxo complexes [Ni(mcN3)(μ-OH)]2(PF6)2 (mcN3 = 2,4,4-trimethyl-1,5,9-triazacyclododec-1-ene (Me3-mcN3) or its 9-methyl derivative (Me4-mcN3)) and the corresponding benzoic acid. The paramagnetic nickel(II) complexes have been characterized in solution by NMR spectroscopy. The influence of the substituents on the hyperfine shift patterns for substituted-benzoate complexes of nickel(II) has been studied. The substituent effects upon the coordination mode of substituted benzoates have been established by X-ray diffraction.

The substituent effects upon the coordination mode of substituted benzoates have been established by X-ray diffraction. The influence of the substituents on the hyperfine shift patterns for these benzoate complexes of nickel(II) has been also studied.Figure optionsDownload as PowerPoint slide