Cvp. Demelo et al., COMPLEXES BETWEEN LANTHANIDE PICRATES AND N,N-DIMETHYLACETAMIDE (DMA)- SYNTHESIS, CHARACTERIZATION AND STRUCTURE OF THE SAMARIUM COMPOUND, Journal of alloys and compounds, 225(1-2), 1995, pp. 350-353
Complexes with the composition Ln(pic)(3).3DMA (Ln = La-Lu, Y; pie, pi
crate; DMA, N,N-dimethylacetamide) were synthesized and characterized.
They behave as non-electrolytes in nitromethane and acetonitrile. Acc
ording to X-ray powder patterns, three different types of diffractogra
ms were obtained: (a) La-Pr; (b) Nd-Yb, Y; (c) Lu. Single-crystal X-ra
y analysis of the samarium compound indicates that Sm3+ is coordinated
by six oxygen donors from three bidentate picrates through the phenox
y and ortho nitro groups and by three oxygens from the DMA molecules f
orming a somewhat distorted tricapped trigonal prism. The absorption s
pectra of the neodymium compound in the solid state and in solution we
re investigated.