Tri-n-butyl carbinol

Di-n-butyl ketone n-Butyl bromide Tri-n-butyl carbinol 91... 

Alkyl and aryl groups have a stabilising effect on the cyclopropenium cation, the former being the more effective, e.g. p g+ values for the tri-n-propyl and triphenyl derivatives are, respectively, 7,2 and 0.5 [5]. Of a series of trialkylcyclopropenium salts the plfg+ values indicated stabilities in the order methyl > n-propyl > isopropyl t-butyl [27]. This order is not that to be expected solely from a consideration of inductive effects. Steric factors may play a role in that vicinal crowding is lessened when the carbinol is formed ... 

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