1,1,1,3,3-PENTAMETHYL-3-ACETOXYDISILOXANE

The 1-Disiloxanol,1,1,3,3,3-pentamethyl-, 1-acetate, with the CAS registry number 70693-47-9, is also known as Pentamethylacetoxydisiloxane. Its EINECS number is 274-767-7. This chemical's molecular formula is C₇H₁₈O₃Si₂ and molecular weight is 206.39. What's more, its IUPAC name is [dimethyl(trimethylsilyloxy)silyl] acetate.

Physical properties of 1-Disiloxanol,1,1,3,3,3-pentamethyl-, 1-acetate are: (1)ACD/LogP: 3.02; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 3.02; (4)ACD/LogD (pH 7.4): 3.02; (5)ACD/BCF (pH 5.5): 116.22; (6)ACD/BCF (pH 7.4): 116.22; (7)ACD/KOC (pH 5.5): 1047; (8)ACD/KOC (pH 7.4): 1047; (9)#H bond acceptors: 3; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 4; (12)Polar Surface Area: 35.53 Å²; (13)Index of Refraction: 1.406; (14)Molar Refractivity: 55.43 cm³; (15)Molar Volume: 225.4 cm³; (16)Polarizability: 21.97×10^-24cm³; (17)Surface Tension: 19.4 dyne/cm; (18)Density: 0.915 g/cm³; (19)Flash Point: 36.9 °C; (20)Enthalpy of Vaporization: 38.63 kJ/mol; (21)Boiling Point: 149.4 °C at 760 mmHg; (22)Vapour Pressure: 4.03 mmHg at 25°C.

Preparation of 1-Disiloxanol,1,1,3,3,3-pentamethyl-, 1-acetate: this chemical can be prepared by acetic acid anhydride and chloro-pentamethyl-disiloxane. This reaction time is 5 hours. The yield is about 90%.

Uses of 1-Disiloxanol,1,1,3,3,3-pentamethyl-, 1-acetate: it can be used to produce hexadecamethyl-heptasiloxane at the temperature of 25 °C. It will need reagent Et₃N and solvent CH₂Cl₂. The yield is about 95%.

When you are using this chemical, please be cautious about it as the following:
This chemical is flammable. It can cause burns. It is irritating to eyes, respiratory system and skin. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. When using it, you need wear suitable protective clothing, gloves and eye/face protection. In case of accident or if you feel unwell, you must seek medical advice immediately (show the label where possible).

You can still convert the following datas into molecular structure:
(1)Canonical SMILES: CC(=O)O[Si](C)(C)O[Si](C)(C)C
(2)InChI: InChI=1S/C7H18O3Si2/c1-7(8)9-12(5,6)10-11(2,3)4/h1-6H3
(3)InChIKey: QSPUKCHZOMPBLM-UHFFFAOYSA-N