Metal alkylidenes are an important class of organometallic chemistry where metal is doublebonded with carbenes ([M]=CR2). Answer the following question for metal alkylidenes: (a)show orbital diagram to explain the bonding in metal alkylidenes,(5 (b)how the other substituents on metal would affect its stability, and (c)discuss their role in (i) olefin metathesis, (ii) ring-opening metathesis, and (iii)ring-closing metathesis with specific examples and catalytic cycles.

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