1,4-Diazabicyclo[2.2.2]octane (DABCO) and its derivatives have been widely investigated due to their good catalytic activity in organic synthesis1-5 and ability to form non-metallic salt.6,7 DABCO is a bicyclic amine with a rigid and compact cage-like structure of nearly-spherical shape which constitutes an unusually favourable characteristic that effectively minimizes the steric hindrance to coordination, which in tertiary aliphatic amines arises from the flexibility of the nitrogen-bonded alkyl groups.