Add time:08/31/2019         Source:sciencedirect.com

Syntheses for [(diphenylphosphinoyl)methyl]-4,5-dihydrooxazole (2) and [(diarylphosphinoyl)methyl]benzoxazoles [aryl = phenyl (3), tolyl (4), 2-trifluoromethylphenyl (5) and 3,5-bis(trifluoromethyl)phenyl (6)] have been developed. Each ligand has been characterized by spectroscopic methods and single crystal X-ray diffraction analyses have been completed for 2, 3, 4 and 5. The coordination chemistry of the ligands with Nd(NO3)3 and Yb(NO3)3 has been examined and structure determinations for [Nd(2)2(NO3)3(CH3OH)], [Nd(2)2(NO3)3], [Yb(3)2(NO3)3(H2O)]·0.5(CH3OH), [Nd(3)2(NO3)3]·3(CHCl3), [Nd(4)2(NO3)3(H2O)], [Yb(4)2(NO3)3(H2O)] and [Yb(5)2(NO3)3(H2O)]·0.5(CH3CN) are reported. Depending upon conditions, the ligands act as monodentate PO or bidentate, chelating PO,N donors.

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