Crystal and molecular structure of a dimethyl sulphoxide complex with lanthanum nitrate, La(NO₃)₃.4(CH₃)₂SO

Abstract

The crystal structure of the complex La(NO3)3.4(CH3)2SO has been solved by the heavy-atom method. The complex crystallizes in the monoclinic space group C2/e with four formula units in a unit cell of dimensions a= 14.94, b= 11.04, c= 15.54 A and fl= 109 ° 10'. The parameters have been refined by threedimensional least-squares procedures with anisotropic thermal parameters for all atoms except hydrogen. The final R index for 1257 observed reflexions is 0.094. The La 3 + ion is coordinated by ten oxygen atoms with La-O distances varying from 2.47 to 2.71 A. The geometry of the coordination polyhedron is described.

From a Cerium-Doped Polynuclear Bismuth Oxido Cluster to β-Bi2O3:Ce

“…It is noteworthy that, after collection of the orange crystals of 1, evaporation of the colorless mother liquid resulted in the formation of colorless crystals of 5 (Figure S3). In analogy to isomorphous Ln(NO 3 ) 3 •4DMSO (Ln = La, 72,73 Pr, 74,75 Nd, 76 and Sm 73 ), the structural characterization of the trivalent cerium nitrate complex 5 by single-crystal X-ray diffraction analysis revealed a monoclinic cell with the space group C2/c and lattice dimensions with a = 14.8526 S4). The successive loss of N 2 O 5 is the result of the nucleophilic attack of a nitrate oxygen atom to the nitrogen atom of a neighboring nitrate anion, followed by the loss of N 2 O 5 , and the resulting O 2− adds to the cluster core.…”

“…It is noteworthy that, after collection of the orange crystals of 1 , evaporation of the colorless mother liquid resulted in the formation of colorless crystals of 5 (Figure S3). In analogy to isomorphous Ln­(NO 3 ) 3 ·4DMSO (Ln = La, , Pr, , Nd, and Sm), the structural characterization of the trivalent cerium nitrate complex 5 by single-crystal X-ray diffraction analysis revealed a monoclinic cell with the space group C 2/ c and lattice dimensions with a = 14.8526(9) Å, b = 10.7328(7) Å, c = 15.3446(9) Å, β = 108.366(2)°, V = 2321.5(2) Å 3 , and Z = 4. The nitrate anions coordinated via a chelating bidentate mode to the cerium atom with d Ce–O = 2.6135(14)–2.7407(13) Å, and the DMSO molecules exhibited a monodentate coordination mode via their oxygen atom with d Ce–O = 2.4232(17)–2.4558(14) Å.…”

Perrhenate and Pertechnetate Complexes of U(IV), Np(IV), and Pu(IV) with Dimethyl Sulfoxide as an O-Donor Ligand

“…Lanthanide nitrates contain a smaller number of DMSO molecules due to the bidentate coordination of nitrate ions occupying six positions in the coordination environment of the metal atom. Depending on the ionic radius of the cation, either [Ln­(NO 3 ) 3 (DMSO) 3 ] (Ln = Tb, ..., Yb) or [Ln­(NO 3 ) 3 (DMSO) 4 ] (Ln = La, ..., Gd) complexes were formed. In the case of perchlorate ions, which usually serve as outer-sphere particles, the first coordination sphere of Ln atoms is formed by DMSO molecules only, as for example, in [Dy­(DMSO) 8 ]­(ClO 4 ) 3 complex …”

Luminescence of Lanthanide–Dimethyl Sulfoxide Compound Solutions

“…Here we report the formation and luminescence of lanthanide–DMSO (Ln–DMSO) compounds formed in high-temperature reactions. It should be pointed out that lanthanide–DMSO compounds have been extensively studied and reported in the literature. − However, most Ln–DMSO compounds reported in the literature were prepared by simply dissolving lanthanide salts in DMSO at room temperature or very low temperatures. − Also, Ln–DMSO crystals were grown by slow evaporation of a solution of an authenticated sample of the lanthanide salt–DMSO solution in acetonitrile or methanol at very low or room temperature. ,, In this study, we prepared the Ln–DMSO compounds by heating them at high temperatures in DMSO. This reaction method is significantly different from that of previous reports and results in products with different luminescence properties.…”