The Structure of fac-Ce(OAsPh3)3Cl3·CH3CN and Ce(OAsPh3)3(NO3)3: Evidence for a structural trans influence

✍ Scribed by R.R. Ryan; E.M. Larson; G.F. Payne; J.R. Peterson

• Book ID: 104138398
• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 532 KB
• Volume: 131
• Category: Article
• ISSN: 0020-1693
• DOI: 10.1016/s0020-1693(00)96036-5

✦ Synopsis

Ce(OAsPhs)sCls.CHsCN, Pi, with cell parameters a = 11.614(l), b = 12.009(2) and c = 20.991(3) A, 01= 89.08(l), /3 = 88.50(l), 7 = 64.40'(2), and Z = 2. Refinement of 320 parameters for 4710 reflections converged to R = 0.052 and R, = 0.067. This is the first example of a Ln(ll1) chloride complex with octahedral coordination in which bulky triphenylarsenic oxide substituents are in a facial conformation. The Ce-0 distance is shorter and the Ce-Cl distance is longer than expected and suggests that a structural rrans influence dictates the conformation of the first coordination sphere. Ce(OAsPh&(NO&, P2Jn, with cell parameters a = 15.14(2), b = 21.31(3), c= 17.81(l)

W, @= 92.30"(4) and Z = 4. The crystals were of poor quality, but the structure is of sufficient accuracy to determine that the complex is facial based on octahedral coordination.

Refinement of 313 parameters on 4070 reflections converged to R = 0.115 and R, = 0.138.