Cyclopentadienylmagnesium alkoxides derived from polyfunctional alcohols

Article abstract of DOI:10.1016/0022-328X(92)83061-L

Magnesocene (1) reacts with polyfunctional alcohols (2a, N,N-dimethylethanolamine; 2b, 2-ethoxyethanol; 2c, 2-(2-ethoxyethoxy)ethanol; 2d, 2-<<(2-dimethylamino)ethyl>methylamino>ethanol) to yield polymeric cyclopentadienylmagnesium alkoxides (3a-d).Compounds 3a-d dissolve in pyridine to yield solutions containing pyridine adducts (4a-d) of the corresponding monomers, which may be isolated in the cases of 4a,b.These compounds all appear to contain formally 12-electron, pseudo-6-coordinate magnesium.Compound 1 reacts with 2,4-dimethyl-6-t-butylphenol (5) to form cyclopentadienyl (2,4-dimethyl-6-t-butylphenoxy)magnesium (6), in which the steric bulk of the phenoxide ligand stabilizes the monomeric, 8-electron configuration.