Silane, difluorodimethyl-
- Formula: C2H6F2Si
- Molecular weight: 96.1513
- IUPAC Standard InChI: InChI=1S/C2H6F2Si/c1-5(2,3)4/h1-2H3
- IUPAC Standard InChIKey: XRRDNAZMVAXXQP-UHFFFAOYSA-N
- CAS Registry Number: 353-66-2
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Difluorodimethylsilane; Dimethyldifluorosilane; (CH3)2SiF2
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Gas phase ion energetics data
Go To: Top, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 11.03 ± 0.03 | PI | Murphy and Beauchamp, 1977 | LLK |
| 11.5 | PE | Roberge, Sandorfy, et al., 1978 | Vertical value; LLK |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| CH3F2Si+ | 11.70 ± 0.03 | CH3 | PI | Murphy and Beauchamp, 1977 | LLK |
De-protonation reactions
C2H5F2Si- + =
By formula: C2H5F2Si- + H+ = C2H6F2Si
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 380.0 ± 4.6 | kcal/mol | G+TS | Allison and McMahon, 1990 | gas phase; Between PhCH3, HCF3; B |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 371.5 ± 4.5 | kcal/mol | IMRB | Allison and McMahon, 1990 | gas phase; Between PhCH3, HCF3; B |
References
Go To: Top, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Murphy and Beauchamp, 1977
Murphy, M.K.; Beauchamp, J.L.,
Photoionization mass spectrometry of the fluoromethylsilanes (CH3)n F4-nSi (n = 1-4),
J. Am. Chem. Soc., 1977, 99, 2085. [all data]
Roberge, Sandorfy, et al., 1978
Roberge, R.; Sandorfy, C.; Matthews, J.I.; Strausz, O.P.,
The far ultraviolet HeI photoelectron spectra of alkyl and fluorine substituted silane derivatives,
J. Chem. Phys., 1978, 69, 5105. [all data]
Allison and McMahon, 1990
Allison, C.E.; McMahon, T.B.,
How Strong is the Si=C Bond in Fluoro- and Methyl Substituted Silaethylenes? An Experimental Determination of Pi Bond Strengths,
J. Am. Chem. Soc., 1990, 112, 5, 1672, https://doi.org/10.1021/ja00161a002
. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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