Preparation, structural characterisation and electrochemical properties of iron(0) and tungsten(0) carbonyl complexes with 1-(diphenylphosphanyl)-1′-vinylferrocene and 1-(diphenylphosphanyl)-1′-(dimethylvinylsilyl)ferrocene as P-monodentate ligands

A new organometallic phosphanylalkene, 1-(diphenylphosphanyl)-1′-(dimethylvinylsilyl)ferrocene (2) was prepared and—together with 1-(diphenylphosphanyl)-1′-vinylferrocene (1)—studied as a ligand in iron- and tungsten-carbonyl complexes. The following complexes featuring the mentioned phosphanylalkenes as P-monodentate donors were isolated and characterised by spectral methods: [Fe(CO)4(L-κP)] (4, L = 1; 5, L = 2) and trans-[W(CO)4(L-κP)2] (6, L = 1; 7, L = 2). In addition, the solid-state structures of 4 and 6 have been determined by single-crystal X-ray diffraction and the electrochemical properties of compounds 1, 2, 4 and 6 were studied by cyclic voltammetry at platinum electrode.