Sequential methyl-fluorine exchange reactions of siloxide ions in the gas phase.
Exchange Me for a fluorine: Trimethylsiloxide ions in the presence of NF(3) in the gas phase undergo an unusual and sequential metathesis-type reaction wherein methyl groups are exchanged for fluorine. Theoretical calculations suggest that the reaction proceeds by a three-step internal-nucleophilic-displacement mechanism which features a pentacoordinated siliconate species as a transition state rather than as an intermediate.
Instituto de Quıímica, Universidade de São Paulo, Caixa Postal 26077, São Paulo CEP 05599-970, Brazil.
Thiago C
TC
Correra
José M
JM
Riveros
D005461:Fluorine / Q000737:chemistry*; D005740:Gases; D007477:Ions; D013058:Mass Spectrometry; D008956:Models, Chemical; D008958:Models, Molecular; D012833:Siloxanes / Q000737:chemistry*
D005740:Gases; D007477:Ions; D012833:Siloxanes; D005461:Fluorine