1. In this chapter, no distinction will be made between the terms ‘carbene’ and ‘alkylidene’ complexes, although some other workers have preferred to use the two terms to distinguish complexes having different types of reactivity.
2. ‘Reactive Molecules: The Neutral Reactive Intermediates in Organic Chemistry’;Wentrup,1984
3. “Organic Reaction Mechanisms. 1985”;Moody,1987