Chromatographic analysis of electrophilic substitution reactions of cobalt(III) and chromium(III) 2,4-pentanedionates

Add time:07/14/2019    Source:sciencedirect.com

Bromination of cobalt(III) and chromium(III) 2,4-pentanedionates has been thoroughly investigated by GC and HPLC. GC was found to be unsuitable for analysis of the cobalt complexes and HPLC was recommended for monitoring electrophilic substitutions of metal β-diketonates, especially chelates which are labile or thermally unstable. Thermogravimetric and Differential Thermal Analyses of the partially and fully brominated chelates have been used to explain their GC behaviour. Reaction components giving rise to the various chromatographic peaks were identified by mass spectrometry and 13C NMR.

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