Synthesis and crystallographic characterization of di-phenyl-amide rare-earth metal complexes Ln(NPh2)3(THF)2 and [(Ph2N)2 Ln(?-NPh2)]2.

ABSTRACT: Studies of the coordination chemistry between the di-phenyl-amide ligand, NPh2, and the smaller rare-earth Ln III ions, Ln = Y, Dy, and Er, led to the structural characterization by single-crystal X-ray diffraction crystallography of both solvated and unsolvated complexes, namely, tris-(di-phenyl-amido-?N)bis-(tetrahydro-furan-?O)yttrium(III), Y(NPh2)3(THF)2 or [Y(C12H10N)3(C4H8O)2], 1-Y, and the erbium(III) (Er), 1-Er, analogue, and bis-[?-1?N:2(?6)-di-phenyl-amido]-bis-[bis-(di-phenyl-amido-?N)yttrium(III)], [(Ph2N)2Y(?-NPh2)]2 or [Y2(C12H10N)6], 2-Y, and the dysprosium(III) (Dy), 2-Dy, analogue. The THF ligands of 1-Er are modeled with disorder across two positions with occupancies of 0.627?(12):0.323?(12) and 0.633?(7):0.367?(7). Also structurally characterized was the tetra-metallic ErIII bridging oxide hydrolysis product, bis-(?-di-phenyl-amido-?2 N:N)bis-[?-1?N:2(?6)-di-phenyl-amido]-tetra-kis-(di-phenyl-amido-?N)di-?3-oxido-tetra-erbium(III) benzene disolvate, {[(Ph2N)Er(?-NPh2)]4(?-O)2}·(C6H6)2 or [Er4(C12H10N)8O2]·2C6H6, 3-Er. The 3-Er structure was refined as a three-component twin with occupancies 0.7375:0.2010:0.0615.

SUBMITTER: Palumbo CT 

PROVIDER: S-EPMC7472762 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature