148511-85-7Relevant academic research and scientific papers
Chelating properties of 2-((diphenylphosphino)methyl)pyridine N,P-dioxide and 2,6-bis((diphenylphosphino)methyl)pyridine N,P,P′-trioxide toward f-element ions
Rapko,Duesler,Smith,Paine,Ryan
, p. 2164 - 2174 (2008/10/08)
The bifunctional 2-((diphenylphosphino)methyl)pyridine N,P-dioxide, 2-[(C6H5)2P(O)CH2]C 5H4NO (4), and trifunctional 2,6-bis((diphenylphosphino)methyl)pyridine N,P,P′-trioxide, 2,6-[(C6H5)2P(O)CH2] 2C5H3NO (5), ligands have been prepared, and their coordination chemistry has been surveyed with Pr(III), Tb(III), Yb(III), and Th(IV). Single-crystal X-ray diffraction analyses have been completed for several complexes. Crystallographic data for [Tb(4)43+] [(NO3)3(H2O)(EtOH)3-]: C74H72N7O19P4Tb, orthorhombic, space group Pbca, a = 26.655(5) ?, b = 25.738(5) ?, c = 20.821(5) ?, Z = 8, V= 14,284(5) ?3; structure refined to RF = 6.24% and RwF = 5.07% on 7068 data with F > 3σ(F). The four ligands 4 produce a square antiprismatic coordination polyhedron. Crystallographic data for [Pr(4)2(NO3)3]·Et 2O·1/2 MeOH: C40.5H44N5O14.5P2Pr, triclinic, space group P1, a = 11.02(5) ?, b = 11.802(12) ?, c = 18.560(4) ?, α = 96.70(2)°, β = 95.84(3)°, γ = 108.55(3)°, Z = 2, V = 2247.9(12) ?3; structure refined to RF = 6.80% and RwF = 5.65% on 4561 data with F > 2σ(F). The Pr(III) is bonded to two bidentate ligands and three nitrate ions. Crystallographic data for [Yb(5)(NO3)3]·MeOH: C32H31N4O13P2Yb, monoclinic, space group P21/n, a = 11.677(2) ?, b = 15.764(3) ?, c = 20.242(3) ?, β = 100.18(1)°, Z = 4, V = 3667.4(9) ?3; structure refined to RwF = 3.94% and RwF = 4.64% on 4680 data with F > 3σ(F). The Yb(III) is bonded to 5 in a tridentate manner, along with three nitrate ions. Crystallographic data for [Yb(5)2(NO3)2+] [(NO3)2(H2O)2(CH3CN) 2.52-]: C67H65. 5N7.5O17P4Yb, triclinic, space group P1, a = 14.328(3) ?, b = 16.033(3) ?, c = 17.001(3) ?, α = 99.27(3)°, β = 101.92(3)°, γ = 107.36(3)°, Z = 2, V= 3542(1) ?3; structure refined to RF = 5.64% and RwF = 7.32% on 10 711 data with F > 3σ(F). The Yb is bonded to 5 in a tridentate fashion, along with one nitrate ion. Crystallographic data for [Th(5)2(NO3)22+] [(NO3]2(H2O)22-]: C62H54N6O20P4Th, monoclinic, space group P21/n, a = 19.136(4) ?, b = 18.365(4) ?, c = 21.448(4) ?, β = 109.48(3)°, Z = 4, V = 7106(3) ?3; structure refined to RF = 8.52% and RwF = 9.18% on 3518 data with F > 4σ(F). Two tridentate ligands 5 and two nitrate ions are bonded to Th(IV). This coordination chemistry is compared with that displayed by the bifunctional ligand, 2-[(C6H5)2P(O)]C5H4NO.
