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Carbenes and alkylidenes

Spot the difference

Transition-metal carbenes and alkylidenes are sometimes considered similar species with subtly different bonding and reactivities. Investigations into scandium and yttrium carbenes have raised questions about our understanding — and definition — of these widely used compounds.

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Figure 1: Comparison of the reactivities of scandium and yttrium carbenes.

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Mindiola, D., Scott, J. Spot the difference. Nature Chem 3, 15–17 (2011). https://doi.org/10.1038/nchem.940

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