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Reactions of Silicon Atoms with Methane and Silane in Solid Argon: A Matrix‐Spectroscopic Study
Author(s) -
Maier Günther,
Reisenauer Hans Peter,
Glatthaar Jörg
Publication year - 2002
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/1521-3765(20021004)8:19<4383::aid-chem4383>3.0.co;2-1
Subject(s) - silane , argon , silicon , methane , chemistry , photochemistry , inert gas , matrix isolation , density functional theory , irradiation , excitation , computational chemistry , organic chemistry , physics , nuclear physics , electrical engineering , engineering
The reaction of silicon atoms with methane ( 1 ) and silane ( 7 ) in argon at 10 K has been studied. Methane ( 1 ) is found to be inert to silicon atoms, but reaction occurs upon photochemical excitation under formation of methylsilylene ( 2 ). On the contrary, silane ( 7 ) is spontaneously converted into a mixture of silylsilylene ( 10 ) and disilene ( 12 ). Subsequent irradiation generates the butterfly‐type disilyne Si 2 H 2 ( 14 ), together with a third photoproduct, which we assume to be the doubly bridged Si 2 H 4 isomer 13 . The structural elucidation of the new species is based on the comparison of the experimental IR and UV/Vis spectra with data from density functional theory calculations. The results are supported by isotopic labeling studies.