Structural study of iron carbonyl derivatives - Le Borgne, G.; Grandjean, D.; Mathieu, R.; Poilblanc, R. (Elsevier)
The preparation of the compound [μ-(SCH"3)Fe(CO)"2L]"2, with L = P(CH"3)"3, is described. Spectroscopic studies show that this compound exists as syn and anti isomers, with respect to the orientation of the SCH"3 groups relative to the metal-metal bond. The crystal and molecular structure of the syn isomer has been determined by a single-crystal X-ray study. The complex crystallizes in the tetragonal space group P4"12"12 (or P4"32"12) with Z = 8. The intensities were measured on a Nonius CAD-4 automatic diffractometer. The structure has been refined to R and R'' values of 0.058 and 0.050 respectively, for 2156 independent reflections. The molecular structure contains two Fe(CO)"2P(CH"3)"3 moieties (with the phosphine ligands in axial positions) bridged through the sulfur atoms of the syn-SCH"3 groups. The iron-iron bond length is 2.518(1) Å. A comparison is made with similar iron carbonyl derivatives without phosphine substituents.
http://linkinghub.elsevier.com/retrieve/pii/S0022-328X(00)84420-4
Keywords: V