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Issue 36, 2018
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Dimethylmagnesium revisited

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A compilation of solvent-free homometallic methyl compounds of the type MMex (x = 1–6) is provided and categorised according to their method of characterisation (powder or single crystal X-ray diffraction, gas electron diffraction (GED), reactivity, unconfirmed). Recrystallisation of polymeric [MgMe2]n from excess GaMe3 led to the formation of highly pure [MgMe2]n suitable for single crystal X-ray crystallographic studies. Transient Mg(GaMe4)2 could be detected in excess GaMe3 by NMR spectroscopy, but its isolation as Mg(GaMe4)2 failed. On one occasion tetrameric [Mg(GaMe4)(OMe)]4 could be isolated as a minor co-product. The formation of single-crystalline [MgMe2]n from a saturated ethereal solution could be reproduced as reported earlier by Coates et al. Assessing the reactivity of potassium methoxide methanol adduct toward Mg(AlMe4)2, the protonolysis reaction with MeOH gave unprecedented [Mg(AlMe4){Al(OMe)2Me2}]2 featuring one 8-membered [MgOAlO]2 metalloxane ring and two 4-membered metallacycles.

Graphical abstract: Dimethylmagnesium revisited

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Publication details

The article was received on 18 Apr 2018, accepted on 15 May 2018 and first published on 16 May 2018

Article type: Paper
DOI: 10.1039/C8DT01542B
Citation: Dalton Trans., 2018,47, 12546-12552
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    Dimethylmagnesium revisited

    C. Stuhl and R. Anwander, Dalton Trans., 2018, 47, 12546
    DOI: 10.1039/C8DT01542B

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