Functionalized polymer, rubber composition and pneumatic tire

A functionalized elastomer comprising the reaction product of (1) a living anionic elastomeric polymer comprising units derived from divinylbenzene and a monomer comprising isoprene; and (2) a polymerization terminator of formula: Q-(CH)Si(OR)R3-Y , is disclosed. Q is RCH=N- or (R)N-. Rrepresents a group consisting of an aryl or substituted aryl having from 6 to 18 carbon atoms, or a heterocycle or heteroaryl having from 3 to 18 carbon atoms. Rindependently represents an alkyl group having from 1 to 6 carbon atoms. Rand Reach independently represents a group having from 1 to 18 carbon atoms selected from the group consisting of an alkyl, a cycloalkyl, an allyl, and an aryl. X is an integer from 1 to 20. Y is an integer from 1 to 3. Units derived from the terminator are exclusively disposed adjacent to units derived from the divinylbenzene.