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1-Oxa-2,5-disilacyclopentane,2,2,5,5-tetramethyl-
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Name

1-Oxa-2,5-disilacyclopentane,2,2,5,5-tetramethyl-

 EINECS 231-037-2
CAS No. 7418-20-4 Density 0.85 g/cm3
PSA 9.23000 LogP 2.42680
Solubility N/A Melting Point <0 °C
Formula C6H16OSi2 Boiling Point 123.7 °C at 760 mmHg
Molecular Weight 160.363 Flash Point 17.7 °C
Transport Information 1993 Appearance N/A
Safety 9-16-33 Risk Codes 11
Molecular Structure Molecular Structure of 7418-20-4 (2,2,5,5-TETRAMETHYL-2,5-DISILA-1-OXACYCLOPENTANE) Hazard Symbols N/A
Synonyms

1,1,3,3-Tetramethyl-2-oxa-1,3-disilacyclopentane;2,2,5,5-Tetramethyl-1-oxa-2,5-disilacyclopentane;2,2,5,5-Tetramethyl-2,5-disila-1-oxacyclopentane;

Article Data 8

1-Oxa-2,5-disilacyclopentane,2,2,5,5-tetramethyl- Synthetic route

74485-31-7

1,1,2,2-tetramethyl-1,2-disilacyclobutane

7418-20-4

2,2,5,5-tetramethyl-2,5-disila-1-oxacyclopentane

Conditions
ConditionsYield
With oxygen67%

1,1,4,4-Tetramethyl-2,3-dioxa-1,4-disilacyclohexane

7418-20-4

2,2,5,5-tetramethyl-2,5-disila-1-oxacyclopentane

Conditions
ConditionsYield
With triphenylphosphine In Petroleum ether at 20℃;57%
With triphenylphosphine In Petroleum ether at 20℃;57%
siloxane polymer

siloxane polymer

7418-20-4

2,2,5,5-tetramethyl-2,5-disila-1-oxacyclopentane

Conditions
ConditionsYield
With potassium hydroxide at 250℃;57%
13528-93-3

1,2-bis-(chlorodimethylsilyl)ethane

A

7418-20-4

2,2,5,5-tetramethyl-2,5-disila-1-oxacyclopentane

B

1,1,4,4-Tetramethyl-2,3-dioxa-1,4-disilacyclohexane

Conditions
ConditionsYield
With dihydrogen peroxide
13528-93-3

1,2-bis-(chlorodimethylsilyl)ethane

7418-20-4

2,2,5,5-tetramethyl-2,5-disila-1-oxacyclopentane

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: K/Na vapor / 280 - 300 °C / 0.1 - 1 Torr
2: 67 percent / O2
View Scheme
Multi-step reaction with 2 steps
1: H2O2
2: 57 percent / triphenylphosphine / petroleum ether / 20 °C
View Scheme
727728-53-2

tetramethyl-1,6,2,5-diazadisila-[6]ferrocenophane

7418-20-4

2,2,5,5-tetramethyl-2,5-disila-1-oxacyclopentane

Conditions
ConditionsYield
Fe-compound decompose by the effect of moisture;
727728-52-1

1-amino-1'-(2,2,5,5-tetramethyl-1-aza-2,5-disilacyclopent-1-yl)ferrocene

7418-20-4

2,2,5,5-tetramethyl-2,5-disila-1-oxacyclopentane

Conditions
ConditionsYield
Fe-compound decompose by the effect of moisture;

bis(2,2,5,5-tetramethyl-1-aza-2,5-disila-cyclo-pentyl)stannylene

7418-20-4

2,2,5,5-tetramethyl-2,5-disila-1-oxacyclopentane

Conditions
ConditionsYield
With carbon dioxide In pentane at 25℃; under 3863.02 Torr; for 1h; Inert atmosphere;
758-21-4

dimethylethylsilane

7418-20-4

2,2,5,5-tetramethyl-2,5-disila-1-oxacyclopentane

H-[SiMe2(CH2)2SiMe2O]n-SiMe2Et

H-[SiMe2(CH2)2SiMe2O]n-SiMe2Et

Conditions
ConditionsYield
(μ3,η2:η3:η5-acenaphthalene)Ru3(CO)7 In 1,4-dioxane at 20℃; for 0.5h;100%
766-77-8

Dimethylphenylsilane

7418-20-4

2,2,5,5-tetramethyl-2,5-disila-1-oxacyclopentane

H-[SiMe2(CH2)2SiMe2O]n-SiPhMe2

H-[SiMe2(CH2)2SiMe2O]n-SiPhMe2

Conditions
ConditionsYield
(μ3,η2:η3:η5-acenaphthalene)Ru3(CO)7 In benzene-d6 at 40℃; for 12h; Product distribution; Further Variations:; Reaction partners; Pressures; Solvents; Catalysts; monomer, monomer/silane ratios, temperatures, reaction times;100%

1-Oxa-2,5-disilacyclopentane,2,2,5,5-tetramethyl- Specification

This chemical is called 1-Oxa-2,5-disilacyclopentane,2,2,5,5-tetramethyl-, and its systematic name is 2,2,5,5-tetramethyl-1,2,5-oxadisilolane. With the molecular formula of C6H16OSi2, its molecular weight is 160.36. The CAS registry number of this chemical is 7418-20-4.

Other characteristics of the 1-Oxa-2,5-disilacyclopentane,2,2,5,5-tetramethyl- can be summarised as followings: (1)ACD/LogP: 3.99; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 3.99; (4)ACD/LogD (pH 7.4): 3.99; (5)ACD/BCF (pH 5.5): 633.6; (6)ACD/BCF (pH 7.4): 633.6; (7)ACD/KOC (pH 5.5): 3524.87; (8)ACD/KOC (pH 7.4): 3524.87; (9)#H bond acceptors: 1; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 9.23 Å2; (13)Index of Refraction: 1.417; (14)Molar Refractivity: 47.02 cm3; (15)Molar Volume: 186.8 cm3; (16)Polarizability: 18.64×10-24cm3; (17)Surface Tension: 17.3 dyne/cm; (18)Density: 0.85 g/cm3; (19)Flash Point: 17.7 °C; (20)Enthalpy of Vaporization: 34.67 kJ/mol; (21)Boiling Point: 123.7 °C at 760 mmHg; (22)Vapour Pressure: 15.9 mmHg at 25°C.

Production method of this chemical: The 1-Oxa-2,5-disilacyclopentane,2,2,5,5-tetramethyl- could be obtained by the reactant of 1,1,4,4-Tetramethyl-2,3-dioxa-1,4-disilacyclohexane. This reaction needs the reagent of triphenylphosφne, and the solvent of petroleum ether. The yield is 57 %. In addition, this reaction should be taken at the temperature of 20 °C.

Uses of this chemical: The 1-Oxa-2,5-disilacyclopentane,2,2,5,5-tetramethyl- could react with dibenzo-1,3-disila-2-thiacycloheptadiene, and obtain the silafluorene and 2,2,4,4,7,7-hexamethyl-[1,3,2,4,7]oxathiatrisilepane. This reaction needs the solvent of benzene. The yield is 44 %. In addition, this reaction should be taken for 5 hours. The other condition is irradiation.

When you are using this chemical, please be cautious about it as the following: This chemical is highly flammable. Keep container in a well-ventilated place. Keep it away from sources of ignition. Take precautionary measures against static discharges.

You can still convert the following datas into molecular structure:
1.SMILES: O1[Si](C)(C)CC[Si]1(C)C
2.InChI: InChI=1/C6H16OSi2/c1-8(2)5-6-9(3,4)7-8/h5-6H2,1-4H3
3.InChIKey: ZJWXCSUSULCHCK-UHFFFAOYAW

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