Cyclopentadienyl antimony halides such as CpSbBr2 and Cp2SbBr were proposed as organometallic compounds potentially applicable as antimony MOCVD
precursors. They were synthesized either by comproportionation of SbCp3 with SbX3 (X = Cl, Br, I) in stoichiometric amounts, producing Cp2SbX and CpSbX2, or reaction of Me3SiCp with SbBr3, yielding Cp2SbBr and CpSbBr2. Some of the synthesized compound were
characterized by 1H and 13C NMR and mass spectroscopy, as well as by 121Sb Mössbauer spectroscopy; isomeric shifts were interpreted for two series of compounds by correlating electronegativity differences
ΔXp for the ligands with their possible π-donation abilities.[[i]]
[i] Th. F. Berlitz, J. Pebler, J. Lorberth, J. Organomet. Chem., 1988, Vol. 348, Iss. 2, p. 175-183 , « Organometallics for metal organic chemical vapour deposition (MOCVD) processes: I. Cyclopentadienyl antimony halides: syntheses and 121Sb Mössbauer spectroscopy, a systematic approach », doi.org/10.1016/0022-328X(88)80393-0