Product Name

  • Name

    1,2-Bis(trimethylsilyloxy)ethane

  • EINECS 230-950-3
  • CAS No. 7381-30-8
  • Article Data37
  • CAS DataBase
  • Density 0.843 g/cm3
  • Solubility
  • Melting Point
  • Formula C8H22O2Si2
  • Boiling Point 165.5 °C at 760 mmHg
  • Molecular Weight 206.432
  • Flash Point 36.6 °C
  • Transport Information UN 1993 3/PG 3
  • Appearance clear colourless to faint yellow liquid
  • Safety 23-24/25-16
  • Risk Codes 10
  • Molecular Structure Molecular Structure of 7381-30-8 (1,2-Bis(trimethylsilyloxy)ethane)
  • Hazard Symbols R10:;
  • Synonyms 1,2-Bis(trimethylsiloxy)ethane;1,2-Ethanediol bis(trimethylsilyl) ether;Ethyleneglycol bis(trimethylsilyl) ether;
  • PSA 18.46000
  • LogP 2.68940

1,2-Bis(trimethylsilyloxy)ethane Specification

The systematic name of 3,6-Dioxa-2,7-disilaoctane,2,2,7,7-tetramethyl- is 2,2,7,7-tetramethyl-3,6-dioxa-2,7-disilaoctane. With the CAS registry number 7381-30-8, it is also named as 1,2-Bis(trimethylsilyloxy)ethane. The product's categories are Industrial/Fine Chemicals; Monoalkoxysilanes; Protection & Derivatization Reagents (for Synthesis); Si (Classes of Silicon Compounds); Si-O Compounds; Synthetic Organic Chemistry. It is clear colourless to faint yellow liquid which should be sealed in the container and stored in the cool and dry place.

The other characteristics of this product can be summarized as: (1)ACD/LogP: 3.33; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 3.33; (4)ACD/LogD (pH 7.4): 3.33; (5)ACD/BCF (pH 5.5): 199.72; (6)ACD/BCF (pH 7.4): 199.72; (7)ACD/KOC (pH 5.5): 1542.59; (8)ACD/KOC (pH 7.4): 1542.59; (9)#H bond acceptors: 2; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 5; (12)Polar Surface Area: 18.46 Å2; (13)Index of Refraction: 1.405; (14)Molar Refractivity: 60.03 cm3; (15)Molar Volume: 244.7 cm3; (16)Polarizability: 23.8×10-24 cm3; (17)Surface Tension: 18.5 dyne/cm; (18)Density: 0.843 g/cm3; (19)Flash Point: 36.6 °C; (20)Enthalpy of Vaporization: 38.55 kJ/mol; (21)Boiling Point: 165.5 °C at 760 mmHg; (22)Vapour Pressure: 2.46 mmHg at 25°C.

Preparation of 3,6-Dioxa-2,7-disilaoctane,2,2,7,7-tetramethyl-: It can be obtained by ethane-1,2-diol and chloro-trimethyl-silane. This reaction needs heating for 50 hours. The yield is 82%.

Uses of 3,6-Dioxa-2,7-disilaoctane,2,2,7,7-tetramethyl-: It can react with furfural to get 2-[2]furyl-[1,3]dioxolane. This reaction needs reagent trimethylsilyl trifluoromethanesulfonate and solvent CH2Cl2 at temperature of -78 °C. The reaction time is 3.5 hours. The yield is 56%.

When you are using this chemical, please be cautious about it as the following:
It is flammable, so people should keep it away from sources of ignition. When use it, people must not breathe vapour and avoid contact with skin and eyes.

People can use the following data to convert to the molecule structure. 
1. SMILES:O([Si](C)(C)C)CCO[Si](C)(C)C
2. InChI:InChI=1/C8H22O2Si2/c1-11(2,3)9-7-8-10-12(4,5)6/h7-8H2,1-6H3
3. InChIKey:JGWFUSVYECJQDT-UHFFFAOYAT

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