Count the number of species from the given list that will stabilize a positively charged carbon (car — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

Carbocations are stabilized strictly by electron-donating groups ($+I$ effect). The $+I$ groups in the list are: $-CH_3$, $-C_2H_5$, $-CD_3$, and $-O^-$. The remaining groups are electronegative and exert a destabilizing $-I$ effect on the carbocation.