Yttrium and lanthanide diphosphanylamides: syntheses and structures of complexes with one [(Ph2P)2N]- ligand in the coordination sphere

Chemistry : a European Journal
Peter W RoeskyNicolas Marinos

Abstract

Treatment of the recently reported potassium salt [K(thf)(n)][N(PPh(2))(2)] (n=1.25, 1.5) with anhydrous yttrium or lanthanide trichlorides in THF leads after crystallization from THF/n-pentane (1:2) to the monosubstituted diphosphanylamide complexes [LnCl(2)[(Ph(2)P)(2)N](thf)(3)] (Ln=Y, Sm, Er, Yb). The single-crystal X-ray structures of these complexes show that the metal atoms are surrounded by seven ligands in a distorted pentagonal bipyramidal arrangement, in which the chlorine atoms are located in the apical positions. The diphosphanylamide ligand is always eta(2)-coordinated through the nitrogen atom and one phosphorus atom. Further reaction of [SmCl(2)[(Ph(2)P)(2)N](thf)(3)] with K(2)C(8)H(8) or reaction of [LnI(eta(8)-C(8)H(8))(thf)(3)] with [K(thf)(n)][N(PPh(2))(2)] in THF gives the corresponding cyclooctatetraene complexes [Ln[(Ph(2)P)(2)N](eta(8)-C(8)H(8))(thf)(2)] (Ln=La, Sm). The single crystals of these compounds contain enantiomerically pure complexes. Both compounds adopt a four-legged piano-stool conformation in the solid state. The structures of the A and the C enantiomers were established by single-crystal X-ray diffraction. The more soluble bistrimethylsilyl cyclooctatetraene complex [Y[(Ph(2)P)(2)N](eta(8...Continue Reading

Citations

Sep 26, 2007·Dalton Transactions : an International Journal of Inorganic Chemistry·Bo LiuXiabin Jing
Feb 6, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Huacheng YingChengfu Pi
Jul 17, 2019·Chemical Communications : Chem Comm·Xiao ChenPeter W Roesky
Jul 6, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Franziska VölckerPeter W Roesky
Nov 27, 2008·Chemistry : a European Journal·Marcus RastätterSven K-H Thiele
Oct 16, 2018·Chemical Science·Shi-Ming ChenSong Gao
Oct 25, 2011·Inorganic Chemistry·Diane A DickieRichard A Kemp
Jun 30, 2019·Inorganic Chemistry·Fangjun ZhangXigeng Zhou

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