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Coordination Compounds of Lanthanide Nitrates with Dimorpholido-N-trichloroacetylphosphorylamide. The Structure of Di(dimorpholido-N-trichloroacetylphosphorylamide)- diaqua Neodymium(III)trinitrate
-
Vladimir A. Ovchynnikov
,
Joachim Sieler
Published/Copyright:
June 2, 2014
Abstract
Lanthanide, Carbacylamidophosphate The coordination compounds of the general formula Ln(NO3)3(HL)2(H2O)2 H2O , where Ln = La, Ce -Nd, Sm -Dy, HL = CCl3C(O)NHP(O)[N(CH2CH2)2O]2, dimorpholido-N-tri-chloroacetylphosphorylamide, have been synthesized. The complexes were studied by IR, 1H and 31P NMR and UV-VIS absorption spectroscopies. X-ray diffraction analyses indicate that all synthesized compounds are isostructural. The crystal structure of Nd(NO3)3(HL)2(H2O)2 H2O was solved (monoclinic, a = 11.0467(3), b = 15.9080(5), c = 24.1921(7) Å, β = 96.4080(10)°, space group P21/n, V = 4224.7(2) Å3, Z = 4, R = 0.049, wR = 0.0915). The complex has a molecular structure. The monodentate neutral phosphorictriamide ligands are coordinated to the metal atom via the phosphoryl oxygen atom. The coordination polyhedron of Nd is a sphenocorona; C.N. = 10(60[NO3-], 20[HL], 20[H2O]).
It was shown that these compounds in methanol solution are 1:1 electrolytes, and in acetone solution weak electrolytes. According to NMR data in acetone solution the complexes of the lanthanides with the ligand {HL} have axial symmetry.
Keywords: Lanthanide; Carbacylamidophosphate
Received: 1999-9-7
Published Online: 2014-6-2
Published in Print: 2000-4-1
© 1946 – 2014: Verlag der Zeitschrift für Naturforschung
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