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HomeProduct name list1-(Trimethylsiloxy)cyclopentene

1-(Trimethylsiloxy)cyclopentene

Synonym(s):1-Cyclopentenyloxytrimethylsilane;Cyclopentanone enol trimethyl silyl ether

  • CAS NO.:19980-43-9
  • Empirical Formula: C8H16OSi
  • Molecular Weight: 156.3
  • MDL number: MFCD00001395
  • EINECS: 243-448-4
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2023-06-08 17:06:37
1-(Trimethylsiloxy)cyclopentene Structural

What is 1-(Trimethylsiloxy)cyclopentene?

Chemical properties

Clear light yellow liquid

The Uses of 1-(Trimethylsiloxy)cyclopentene

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.]

Properties of 1-(Trimethylsiloxy)cyclopentene

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 information for 1-(Trimethylsiloxy)cyclopentene

Signal word Warning
Pictogram(s)
ghs
Flame
Flammables
GHS02
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H226:Flammable liquids
H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P302+P352:IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for 1-(Trimethylsiloxy)cyclopentene

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