Selective crystallization of di-sec-butylmagnesium. N,N,N',N'-tetramethylethylenediamine from solutions containing mixtures of normal-butyl and secondary-butyl isomers

Barnett, N.D.R. and Clegg, W. and Mulvey, Robert and O'Neil, P.A. and Reed, D. (1996) Selective crystallization of di-sec-butylmagnesium. N,N,N',N'-tetramethylethylenediamine from solutions containing mixtures of normal-butyl and secondary-butyl isomers. Journal of Organometallic Chemistry, 510 (1-2). pp. 297-300. ISSN 0022-328X (https://doi.org/10.1016/0022-328X(95)05900-A)

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Abstract

Found to crystallise selectively from treatment of commercial (s)Bu((n)Bu)Mg solutions with N,N,N',N'-tetramethylethylenediamine (TMEDA), the complex ((s)Bu(2)Mg . TMEDA) is mononuclear in the crystal state and undergoes a solvation-desolvation equilibrium in arene solution. The crystal structure is noteworthy for the large C-Mg-C bond angle of 133.6(2)degrees, attributable to the branched nature of the alkyl substituents. This angular distortion is thought to encourage the partial loss of TMEDA from Mg centres in solution.

ORCID iDs

Barnett, N.D.R., Clegg, W., Mulvey, Robert ORCID logoORCID: https://orcid.org/0000-0002-1015-2564, O'Neil, P.A. and Reed, D.;
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