title: Reactions between M+ (M = Si, Ge, Sn and Pb) and benzene in the gas phase.
abstract: Using a laser ablation/inert buffer gas ion source coupled with a reflectron time-of-flight mass spectrometer, the gas-phase reactions between the IVA group element ions M(+) (M = Si, Ge, Sn and Pb) and benzene seeded in argon gas were studied. In addition to the association reaction pathway (forming [M(C(6)H(6))(x)](+), x = 1, 2, etc.), benzene was dissociated to form complex ions [M(C(5)H(5))](+), [M(C(7)H(5))](+) and [M(C(9)H(x))](+) (x = 5, 7 and 9), etc. DFT theoretical calculations indicated that, in the association products [M(C(6)H(6))](+), the M atom is close to one carbon atom of benzene, while in most of the dissociation complexes, pentagonal structures (M/cyclopentadienyl derivatives) were formed, with the M atom situated near the fivefold axis of the five-membered ring. The bond patterns in these complexes are discussed.
authors.affiliation: State Key Laboratory of Molecular Reaction Dynamics, Center of Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People's Republic of China.
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Xing
authors.forename: Zhixin
authors.initials: Z
authors.lastname: Tian
authors.forename: Hongtao
authors.initials: H
authors.lastname: Liu
authors.forename: Zichao
authors.initials: Z
authors.lastname: Tang
mesh_terms: D001554:Benzene / Q000737:chemistry*; D005740:Gases; D005857:Germanium / Q000737:chemistry; D007854:Lead / Q000737:chemistry; D013058:Mass Spectrometry / Q000379:methods*; D008670:Metals / Q000737:chemistry*; D009942:Organometallic Compounds / Q000032:analysis*; D012825:Silicon / Q000737:chemistry; D014001:Tin / Q000737:chemistry
chemical_list: D005740:Gases; D008670:Metals; D009942:Organometallic Compounds; D005857:Germanium; D007854:Lead; D014001:Tin; D001554:Benzene; D012825:Silicon