with E_str=0 kcal/mol, in contrast to the usual ? aromaticity, that, for example, has a highly stabilizing effect in benzene. Other studies do not support the role of ?-aromaticity in cyclopropane and the existence of an induced ring current; such studies provide an alternative explanation for the energetic stabilization and abnormal magnetic behaviour of cyclopropane.

Synthesis

Cyclopropane was first produced via a Wurtz coupling, in which

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