A new organomercury(II) compound derived from both 3-ferrocenyl-2-crotonic acid and its decarboxylation product

A new Hg(II) complex [Hg(OOCCHdouble bond; length as m-dash(CH3)CFc)(CHdouble bond; length as m-dash(CH3)CFc)] · MeOH (Fc = (η5-C5H5)Fe(η5-C5H4)) (1) was obtained by the reaction of Hg(OAc)2 with FcC(CH3)double bond; length as m-dashCHCOONa in methanol solution. X-ray structural analysis reveals that the center Hg(II) ion is two-coordinated by the FcC(CH3)double bond; length as m-dashCHCOO− unit and the decarboxylation FcC(CH3)double bond; length as m-dashCHC− unit. This is the first example of Hg(II) monomer containing both ferrocenyl carboxylate and its decarboxylation product. Its thermal properties were investigated under N2.