Syntheses, spectroscopic study and X-ray crystallography of some new phosphoramidates and lanthanide(III) complexes of N-(4-nitrobenzoyl)-N',N''-bis(morpholino)phosphoric triamide

Acta Crystallographica. Section B, Structural Science
Khodayar GholivandCarlos O Della Védova

Abstract

New phosphoramidates with the formula RC(O)N(H)P(O)X(2), R = 2-NO(2)-C(6)H(4), 3-NO(2)-C(6)H(4) and 4-NO(2)-C(6)H(4), X = N(CH(2)CH(3)) (1)-(3), NC(4)H(8) (4)-(6), and NC(4)H(8)O (7)-(9) were synthesized and characterized by (1)H, (13)C, (31)P NMR and IR spectroscopy, and elemental analysis. The reaction of (9) with hydrated lanthanide(III) nitrate leads to ten- or nine-coordinated complexes, (10)-(13). The crystal structure has been determined for (3), (5), (9), (10) and (13). In contrast to all of the previously reported similar phosphoramidate compounds, the -C(O)-N(H)-P(O) skeleton in the free ligand (9) shows a cisoid conformation, with the C=O and P=O double bonds adopting a nearly syn conformation. Quantum chemical calculations were applied for clarifying this exceptional conformational behavior. The monodentate neutral ligand (9) is coordinated to the metal ions via the phosphoryl O atom, adopting the usual anti conformation between the C=O and P=O groups.

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Jul 21, 2009·Acta Crystallographica. Section B, Structural Science·Khodayar GholivandCarlos O Della Védova

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Citations

Apr 2, 2015·Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials·Khodayar GholivandMahdieh Hosseini
Aug 25, 2020·Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials·Andrey KnyazevYury Galyametdinov
Aug 31, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Francesca GuagniniEnrico Dalcanale

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