Two new tetrahedral Co(II) complexes, [Co(dmphen)Cl2)] (1) and [Co(ph2dmphen)Cl2]2·CHCl3 (2), (where dmphen = 2,9-dimethyl-1,10-phenanthroline, or neocuproine and ph2dmphen = 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline, or bathoneocuproine) were synthesized and characterized by elemental analysis, and by IR, UV–visible and 1H NMR spectroscopy. Single-crystal X-ray diffraction study of the two compounds revealed analogous tetrahedral arrangements of the ligands around the cobalt(II) ion. Measurement of magnetic susceptibility (χ = 2.31 × 10−5 and 6.96 × 10−6) of 1 and 2 by 1H NMR spectroscopy (Evans method) revealed their magnetic moments were 4.32 and 4.29 BM, respectively, which also suggests tetrahedral coordination in the two complexes, with S = 3/2.
Research on Chemical Intermediates – Springer Journals
Published: May 30, 2013
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