Electrospray Mass Spectrometric Studies on the Solution Chemistry of Triorganostannyl Trifluoromethanesulfonates

Compounds of the type R 3 Sn(OSO 2 CF 3 ) (triorganostannyl trifluoromethanesulfonates, R = Me, Bu, Ph) were synthesized and investigated in solution using electrospray mass spectrometry. The mono-acetonitrile adduct [R 3 Snz(CH 3 CN)] + is the dominant ionic species in acetonitrile solution, with a...

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Bibliographic Details
Published in:Phosphorus, sulfur, and silicon and the related elements sulfur, and silicon and the related elements, 1999-02, Vol.150 (1), p.339-356
Main Authors: Dakternieks, Dainis, Lim, Allan E. K., Lim, Kieran F.
Format: Article
Language:English
Subjects:
cations
mass spectrometry
organotin
solution chemistry
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Summary:Compounds of the type R 3 Sn(OSO 2 CF 3 ) (triorganostannyl trifluoromethanesulfonates, R = Me, Bu, Ph) were synthesized and investigated in solution using electrospray mass spectrometry. The mono-acetonitrile adduct [R 3 Snz(CH 3 CN)] + is the dominant ionic species in acetonitrile solution, with a weaker signal owing to R 3 Sn + . The relative intensity of R 3 Sn + increases significantly upon the use of dichloromethane as a solvent. Variable temperature 119 Sn NMR studies were also undertaken on the trimethylstannyl and triphenylstannyl trifluoromethanesulfonates in dichloromethane solution. The 119 Sn chemical shifts and Lewis-base adduction studies reveal that the trioganostannyl trifluoromethanesulfonates are only slightly more Lewis-acidic than the corresponding triorganostannyl chlorides. These solutions are too labile to be studied on the NMR timescale.
ISSN:1042-6507
1563-5325
DOI:10.1080/10426509908546403