1,3-Dipolar reactions involving corannulene: How does its rim and spoke addition vary?

Investigations are carried out to identify the mechanism for the corannulene 1,3-dipolar reactions and the regioselectivity or relative reactivity of rim and spoke pi-bonds in the corannulene 1,3-dipolar cycloaddition. The rim bond of corannulene is more flexible for distortion and also has a stronger double bond than the spoke bond and this facilitates rim addition over spoke addition.