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Structure of 1,1'-bis(diphenylphosphinotetramethyl)ferrocene

1991; Wiley; Volume: 47; Issue: 9 Linguagem: Inglês

10.1107/s0108270191002767

1600-5759

Gwenaëlle Trouvé, R. Broussier, B. Gautheron, M. Kubicki,

Chemical Synthesis and Analysis

Fe(C21H22P)2), Mr = 666.61, triclinic, Pi, a = 7.698 (3), b = 8.663 (2), c = 13.724 (4) A, a = 80-25 (2), fl = 83-58 (3), 3/= 75.69 (3) °, V = 871.6 A 3, Z = 1, D,, = 1.270 g cm -3, a(Mo Ka) = 071073/~, /z = 5-490 cm-1, F(000) = 352, T = 296 (1) K, R = 0.047 for 2712 reflections with I > 3.5o.(I). The title complex, a precursor for bi- or polymetallic com- pounds, bears a new bifunctional permethylated ligand which is more electron rich than the known diphenylphosphinecyclopentadienyl moiety. The geometry of the complex is affected little by the substitution of methyl groups for H atoms in the tings. The molecule is centrosymmetric with the Fe atom at the crystallographic inversion centre. Experimental. The compound was synthesized by reaction of FeC12 with CsMe4PPh2Li in THF. Recrystallization from CHC13/pentane afforded yellow single crystals. A specimen (0.08 x 0.08 x 0.15 mm) was mounted on an Enraf-Nonius CAD-4 diffractometer. The unit cell was determined and refined from angle data of 25 randomly seiected reflections in the range 11 < 0 < 19 ° (CAD-4 rou-