88035-41-0Relevant academic research and scientific papers
Preparation of tetraalkyl phosphine complexes of the f-block metals. Crystal structure of Th(CH2Ph)4(Me2PCH2CH 2PMe2) and U(CH2Ph)3Me(Me2PCH2CH 2PMe2)
Edwards, Peter G.,Andersen, Richard A.,Zalkin, Allan
, p. 293 - 298 (2008/10/08)
Reaction of 4 molar equiv of PhCH2Li with MCl4(Me2PCH2CH2PMe2) 2 gives M(CH2Ph)4-(Me2PCH2CH 2PMe2), where M is Th or U. Reaction of a mixture of 3 molar equiv of PhCH2Li and 1 molar equiv of MeLi with MCl4(Me2PCH2CH2PMe2) 2 gives the unsymmetrical alkyls M(CH2Ph)3Me-(Me2PCH2CH 2PMe2), where M is Th or U. The molecular structure of Th(CH2C6H5)4(Me2PCH 2CH2PMe2) and U(CH2C6H5)3Me(Me2PCH 2CH2PMe2) were determined by single-crystal X-ray diffraction methods. Crystals of Th(CH2Ph)4(Me2PCH2CH 2PMe2) are triclinic of space group P1 with cell dimensions a = 111.463 (2) ?, b = 16.151 (3) ?, c = 21.527 (3) ?, α = 106.28 (2)°, β = 95.85 (2)°, and γ = 107.78 (2)°; there are four molecules in the unit cell. Crystals of U(CH2Ph)3Me(Me2PCH2CH 2PMe2) are monoclinic of space group P21/c with cell dimensions a = 13.035 (2) ?, b = 15.381 (2) ?, c = 14.540 (2) ?, β = 98.06 (2)°; there are four molecules in the unit cell. In the Th complex there are two independent molecules in the unit cell. The Th atoms are each bonded to four benzyl groups and to two phosphorus atoms from the bis(dimethylphosphino)ethane ligand; the average Th-C distance is 2.55 (2) ?, and the average Th-P distance is 3.17 (3) ?. In the U complex the uranium atom is bonded to a methyl group, three benzyl groups, and the two phosphorus atoms of the bis(dimethylphosphino)ethane ligand. The U-C(methyl) distance is 2.41 (1) ?; the average U-C(benzyl) distance is 2.50 (4) ?.
