221305-72-2Relevant academic research and scientific papers
Structure and reactivity of a cobalt(I) phthalaldehyde complex with both σ- and π-bonded aldehyde groups
Lenges, Christian P.,Brookhart, Maurice,White, Peter S.
, p. 552 - 555 (1999)
A bidentate phthalaldehyde ligand with both σ and π coordination of the aldehyde groups is found in [(C5Me5)Co{(C(O)H)2C6H4}] (structure depicted). This complex is the 'resting state' of the catalyst in the ring closure of the dialdehyde to give the lactone. Interchange of coordination modes occurs with a barrier of 70 kJ mol-1 at 35°C. Investigation of other Co1 chelate complexes with a single aldehyde group shows that the coordination mode of the aldehyde is dictated by the nature of the bonding of the other ligating group.
