95340-23-1Relevant academic research and scientific papers
Aryloxide ligands in the metathesis of olefins: Syntheses of W(OAr)xCl6-x complexes with x = 2, 3, and 4. Crystal structures of W(O-2,6-C6H3-i-Pr2)3Cl3 and W(O-2,6-C6H3Ph2)2Cl4
Quignard, Francoise,Leconte, Michel,Basset, Jean-Marie,Hsu, Leh-Yeh,Alexander, John J.,Shore, Sheldon G.
, p. 4272 - 4277 (2008/10/08)
Syntheses and characterization of three families of aryloxide complexes of W(VI), which are useful precursors for metathesis of olefins, are reported: W(OAr)x(Cl)6-x (x = 2, 3, 4). The structures of Cl3W(O-2,6-C6H3-i-Pr2)3 and Cl4W(O-2,6-C6H3Ph2)2 are described. Both complexes have slightly distorted octahedral coordination spheres. For the structure of Cl3W(O-2,6-C6H3-i-Pr2)3, the chlorines occupy the meridional sites, while in the case of Cl4W(O-2,6-C6H3Ph2)2, the OC6H3Ph2 groups are cis to each other. Crystal data for Cl3W(O-2,6-C6H3-i-Pr2)3: space group P21/n, monoclinic, a = 13.446 (2) ?, b = 17.824 (4) ?, c = 16.289 (3) ?, β = 99.55 (1)°, V = 3851 ?3, mol wt 882.02, ρcalcd = 1.418 g cm-3 for Z = 4. For Mo Kα 7164 unique reflections were collected at 298 K over the range 4° ≤ 20 ≤ 50° with 5582 reflections > 3σ(I) used in the final refinement. RF = 0.023 and RwF = 0.031. Crystal data for Cl4W(O-2,6-C6H3Ph2) 2·1/2C7H8: space group P1, triclinic, a = 10.547 (3) ?, b = 13.669 (1) ?, c = 14.632 (1) ?, α = 84.89 (2)°, β = 78.34 (1)°, γ = 83.48 (2)°, V = 2062 ?3, mol wt 816.26, ρcalcd = 1.317 g cm-3 for Z = 2. For Mo Kα 2915 reflections were collected at 298 K over the range 4° ≤ 2θ ≤ 40° with 2588 reflections ≥3σ(I) used in the final refinement. RF = 0.058 and RwF = 0.094.
