Journal of Organometallic Chemistry p. 229 - 238 (1982)
Update date:2022-08-29
Topics:
Freijee, F. J. M.
Wal, G. Van Der
Schat, G.
Akkerman, O. S.
Bickelhaupt, F.
Association measurements in THF solution reveal that cyclic organomagnesium compounds capable of intramolecular coordination between magnesium and a suitably located oxygen atom in the ring exist exclusively as monomers in THF solution, whereas their oxygen-free analogues have a high tendency to dimerize; 1-oxa-5-magnesacyclooctane (I), 1-oxa-6-magnesacyclodecane (II), its dibenzoanalogue III, and the corresponding di-Grignard reagents IIB and IIIB were investigated.A thermochemical investigation of I-III yielded more quantitative information; the intramolecular coordinative O-Mg bond has been found to be stronger than the intermolecular bond to THF.The ring strain in these compounds is discussed.
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