Xing Xiaopeng, Tian Zhixin, Liu Hongtao, Tang Zichao
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.
Rapid Commun Mass Spectrom. 2003;17(15):1743-8. doi: 10.1002/rcm.1115.
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.
