hat are singlet and triplet carbenes? Draw their structures. Why are the addition reactions of singlet carbenes on carbon-carbon double bonds stereospecific while such reactions of triple carbenes are not? Explain taking suitable examples.

hat are singlet and triplet carbenes? Draw their structures. Why are the addition reactions of singlet carbenes on carbon-carbon double bonds stereospecific while such reactions of triple carbenes are not? Explain taking suitable examples.

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