title: Cycloaddition reaction of 1,3-butadiene with a symmetric Si adatom pair on the Si(111)7x7 surface.
abstract: We first found experimentally a cycloaddition reaction of a molecule on a symmetry Si pair, 1,3-butadiene on the Si adatom pair of Si(111)7x7, while up to now only asymmetric Si pairs were reported to be involved in cycloaddition reactions on Si surfaces. As the symmetry of a Si pair is expected to influence significantly a cycloaddition product and a reaction pathway, the [4+2]-like cycloaddition product of 1,3-butadiene on the Si adatom pair is suggested to form through a concerted reaction pathway in comparison to a stepwise reaction pathway, which is favorable in the formation of the [4+2]-like cycloaddition product on the asymmetric Si pair (the Si adatom-restatom pair).
authors.affiliation: Thin Film Materials Laboratory, Korea Research Institute of Chemical Technology, Yuseong Post Office Box 107, Daejeon 305-600, Korea.
authors.forename: Jaeyoon
authors.initials: J
authors.lastname: Baik
authors.forename: Minkook
authors.initials: M
authors.lastname: Kim
authors.forename: Chong-Yun
authors.initials: CY
authors.lastname: Park
authors.forename: Yunsoo
authors.initials: Y
authors.lastname: Kim
authors.forename: Joung Real
authors.initials: JR
authors.lastname: Ahn
authors.forename: Ki-Seok
authors.initials: KS
authors.lastname: An