Abstract
A sodium salt of samarium nitrilotris(methylenephosphonate) complex [Na(H2O)6]2[SmH{μ7-N(CH2PO3)3}2Na6(H2O)10] · 6H2O has been synthesized, isolated, and studied. Crystals are monoclinic, space group P21/c, Z = 2, a = 11.8046(2) Å, b = 10.5454(2) Å, c = 19.8116(3) Å, and β = 94.2790(10)°. The Sm atom is coordinated to two acid residues {N(CH2PO3)3} bound to each other through six P–O–Na–O–P bridges. The Sm coordination polyhedron is a rhombohedron elongated along the N–Sm–N axis. The Sm–O bond length (2.379(10) Å) is 0.615(12) Å smaller than Sm–N (2.9944(19) Å), which is explained by back donation of Sm–O bonds and generation of an increased electron density region in the vicinity of the Sm atom.
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This work was performed in the framework of State Assignment of the Federal Agency of Scientific Organization of the Russian Federation (no. АААА-А17-117022250040-0).
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Chausov, F.F., Somov, N.V., Lomova, N.V. et al. Bis(hexaaquasodium) Bis(nitrilo(tris(methylenephosphonato))decaaquamonohydrogenhexasodiumsamarate Hexahydrate [Na(H2O)6]2[SmH{μ7-N(CH2PO3)3}2Na6(H2O)10] · 6H2O: Synthesis, Structure, and Nature of Coordination Bond. Russ. J. Inorg. Chem. 65, 854–863 (2020). https://doi.org/10.1134/S0036023620060030
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DOI: https://doi.org/10.1134/S0036023620060030