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- W2087763030 abstract "The proton affinities of trimethylsilyl alcohol and several trimethylsilyl alkyl ethers have been determined by the bracketing technique in gas chromatography/chemical ionization mass spectrometry. Improvements have been made in this technique which increase the accuracy of the proton affinity measurements. Values of proton affinities obtained by the bracketing technique are in very good agreement with literature values. The protonated species of interest may be synthesized in the mass spectrometer; hence, proton affinities can be measured without having the compounds in question. The proton affinities of the Si-containing compounds are 0.5 kcal mol−1 larger than their carbon analogues. The proton affinity of (CH3)3SiOH is 194.2±0.4 kcal mol−1, in agreement with a recent estimate from an equilibrium measurement on triethylsilanol. From the proton affinities of the alkyl trimethylsilyl ethers and the previously reported dissociation energies for the protonated ethers, one can obtain an estimate of 141 kcal mol−1 for ΔH⦵f[(CH3)3Si+]. One can also estimate the heats of formation of the gaseous neutral trimethylsilyl alkyl ethers." @default.
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- W2087763030 date "1989-09-01" @default.
- W2087763030 modified "2023-09-26" @default.
- W2087763030 title "The ion chemistry and thermochemistry of several trimethylsilyl compounds" @default.
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- W2087763030 doi "https://doi.org/10.1016/0168-1176(89)83021-6" @default.
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