1-(Trimethylsiloxy)cyclopentene Property

Boiling point:

45 °C/11 mmHg (lit.)

Density 

0.878 g/mL at 25 °C (lit.)

refractive index 

n20/D 1.440(lit.)

Flash point:

101 °F

storage temp. 

−20°C

form 

clear liquid

color 

Colorless to Light yellow to Light orange

Specific Gravity

0.878

Hydrolytic Sensitivity

7: reacts slowly with moisture/water

BRN 

385956

CAS DataBase Reference

19980-43-9(CAS DataBase Reference)

EPA Substance Registry System

Silane, (1-cyclopenten-1-yloxy)trimethyl- (19980-43-9)

Safety

Hazard Codes 

Xi

Risk Statements 

10-36/37/38

Safety Statements 

26-36

RIDADR 

UN 1993 3/PG 3

WGK Germany 

3

F 

10-21

TSCA 

Yes

HazardClass 

3.2

PackingGroup 

III

HS Code 

29319090

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H226Flammable liquid and vapour

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

1-(Trimethylsiloxy)cyclopentene Chemical Properties,Usage,Production

Chemical Properties

Clear light yellow liquid

Uses

1-(Trimethylsiloxy)cyclopentene may be used in chemical synthesis studies.

Purification Methods

If too impure as seen by the NMR spectrum, then dissolve it in 10 volumes of pentane, shake with cold NaHCO3 (3 x 500mL), then 1.5M HCl (200mL) and aqueous NaHCO3 (200mL) again, dry (Na2SO4), filter, evaporate and distil it through a short Vigreux column (p 11). 1H NMR: (CDCl3) : 0.21 (s, 9H), 1.55 (m, 2H), 1.69 (m, 2H), 2.05 (br d, 4H) and 4.88 (br s, 1H). GLPC in a 6ft x 1/8inch with 3% SP2100 on 100-120 mesh Supelcoport column should give one peak. Store dry. [For the cyclohexene analogue see Varghese et al. Org Synth Coll Vol VIII 460 1993.]