Hexamethyldisilazane

Formula: C₆H₁₉NSi₂
Molecular weight: 161.3928
IUPAC Standard InChI: InChI=1S/C6H19NSi2/c1-8(2,3)7-9(4,5)6/h7H,1-6H3
IUPAC Standard InChIKey: FFUAGWLWBBFQJT-UHFFFAOYSA-N
CAS Registry Number: 999-97-3
Chemical structure:
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Other names: Silanamine, 1,1,1-trimethyl-N-(trimethylsilyl)-; Disilazane, 1,1,1,3,3,3-hexamethyl-; Bis(trimethylsilyl)amine; 1,1,1,3,3,3-Hexamethyldisilazane; ((CH3)3Si)2NH; HMDS; OAP; Trimethyl-N-(trimethylsilyl)silanamine; 1,1,1-Trimethyl-N-(trimethylsilyl)silanamine; NSC 93895; SZ 6079; TSL 8802
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Gas phase ion energetics data

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Data compiled as indicated in comments:
B - John E. Bartmess
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

IE (eV)	Method	Reference	Comment
8.55	PE	Molder, Pikver, et al., 1983	Vertical value; LBLHLM
8.79 ± 0.05	PE	Harris, Lappert, et al., 1976	Vertical value; LLK
8.66	PE	Starzewski, Dieck, et al., 1974	Vertical value; LLK

De-protonation reactions

C₆H₁₈NSi₂^- + = Hexamethyldisilazane

By formula: C₆H₁₈NSi₂^- + H⁺ = C₆H₁₉NSi₂

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1490. ± 8.8	kJ/mol	G+TS	Grimm and Bartmess, 1992	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1460. ± 8.4	kJ/mol	IMRE	Grimm and Bartmess, 1992	gas phase; B

References

Go To: Top, Gas phase ion energetics data, Notes

Molder, Pikver, et al., 1983
Molder, U.H.; Pikver, R.J.; Koppel, I.A., Photoelectron spectra of molecules. 4. Amines, Org. React. Tartu, 1983, 20, 355. [all data]

Harris, Lappert, et al., 1976
Harris, D.H.; Lappert, M.F.; Pedley, J.B.; Sharp, G.J., Bonding studies of compounds of group 3-5 elements. Part XVIII. He(I) photoelectron spectra of bivalent homoleptic alkyls and amides, especially of group 4 elements, and of tin(II) chloride and bromide, J. Chem. Soc. Dalton Trans., 1976, 945. [all data]

Starzewski, Dieck, et al., 1974
Starzewski, K.A.O.; Dieck, H.T.; Bock, H., Photoelectron spectra molecular properties. XXIII. Photoelectron spectra of silicon-substituted ylidic systems, J. Organomet. Chem., 1974, 65, 311. [all data]

Grimm and Bartmess, 1992
Grimm, D.T.; Bartmess, J.E., The Intrinsic (Gas Phase) Basicity of some Anions Commonly Used in Condensed-Phase Synthesis, J. Am. Chem. Soc., 1992, 114, 4, 1227, https://doi.org/10.1021/ja00030a016 . [all data]

Notes

Go To: Top, Gas phase ion energetics data, References

Symbols used in this document:

Δ_rG° Free energy of reaction at standard conditions

Δ_rH° Enthalpy of reaction at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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Δ_rG°	Free energy of reaction at standard conditions
Δ_rH°	Enthalpy of reaction at standard conditions