Chemical Properties of 1,1,1,3,5,5,5-HEPTAMETHYLTRISILOXANE

InChI

InChI=1S/C7H22O2Si3/c1-10(8-11(2,3)4)9-12(5,6)7/h10H,1-7H3

InChI Key

QNWOFLWXQGHSRH-UHFFFAOYSA-N

Formula

C7H22O2Si3

SMILES

C[SiH](O[Si](C)(C)C)O[Si](C)(C)C

Molecular Weight¹

222.51

Other Names

• 3H-Heptamethyltrisiloxane
• Bis(trimethylsiloxy)methylsilane
• Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-

• ω : Acentric Factor.
• logP_oct/wat : Octanol/Water partition coefficient.
• P_c : Critical Pressure (kPa).
• T_boil : Normal Boiling Point Temperature (K).
• T_c : Critical Temperature (K).
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
ω	0.5247		PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
logPoct/wat	2.540		Crippen Calculated Property
Pc	[1480.00; 1481.00]	kPa
Pc	1480.00	kPa	IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 11 Compiled value
Pc	1481.00	kPa	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Pc	1481.00 ± 1.47	kPa	NIST
Tboil	415.78 ± 0.40	K	NIST
Tc	[553.40; 553.40]	K
Tc	553.40	K	IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 11 Compiled value
Tc	553.40	K	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Tc	553.40 ± 0.55	K	NIST

Cheméo can also estimate Normal melting (fusion) point, Critical Volume, Enthalpy of formation at standard conditions, Enthalpy of vaporization at standard conditions, Standard Gibbs free energy of formation, Ionization energy, Log10 of Water solubility in mol/l for this compound, but they fall outside the models' validated range, so they are not shown here. Open the prediction tool to compute them on demand.

Similar Compounds

Find more compounds similar to 1,1,1,3,5,5,5-HEPTAMETHYLTRISILOXANE.

Sources

• IUPAC Vapor-Liquid Critical Properties of Elements and Compounds, part 11 ChEDL chemicals 1.5.2, from Ambrose, D.; Tsonopoulos, C.; Nikitin, E. D. Vapor-Liquid Critical Properties of Elements and Compounds. 11. Organic Compounds Containing B + O; Halogens + N, + O, + O + S, + S, + Si; N + O; and O + S, + Si. J. Chem. Eng. Data 2009, 54, 669-689.
• PSRK revision IV (2005), critical constants and acentric factors of 1000 components ChEDL chemicals 1.5.2, from Horstmann, S.; Jabłoniec, A.; Krafczyk, J.; Fischer, K.; Gmehling, J. PSRK Group Contribution Equation of State: Comprehensive Revision and Extension IV, Including Critical Constants and α-Function Parameters for 1000 Components. Fluid Phase Equilib. 2005, 227, 157-164.
• Crippen Method
• Crippen Method
• NIST Webbook

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