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Updated: Mar 17, 2026
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The solid state structures of the high and low temperature phases of dimethylcadmium
Felix Hanke1, Sarah Hindley2, Anthony C Jones3
1Dassault Systèmes BIOVIA, 334 Science Park, Cambridge CB4 0WN, UK.
Abstract:
The solid state structure of dimethylcadmium, a classic organometallic compound with a long history, has remained elusive for almost a century. X-ray crystallography and density functional theory reveal similar phase behaviour as in dimethylzinc. The high temperature tetragonal phase, α-Me2Cd, exhibits two-dimensional disorder, while the low temperature monoclinic phase, β-Me2Cd, is ordered. Both phases contain linearly coordinated cadmium atoms. While the methyl groups are staggered in the α-phase, they are eclipsed in the β-phase.
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