Molecular Structure of 1-(Trimethylsiloxy)cyclopentene (CAS No.19980-43-9):

Molecular Formula: C₈H₁₆OSi 
Molecular Weight: 156.2975
CAS No: 19980-43-9
IUPAC Name: Cyclopenten-1-yloxy(trimethyl)silane 
Product Categories: Monoalkoxysilanes;Si (Classes of Silicon Compounds);Silicon Compounds (for Synthesis);Si-O Compounds;Synthetic Organic Chemistry
H bond acceptors: 1
H bond donors: 0
Freely Rotating Bonds: 2
Polar Surface Area: 9.23 Å²
Index of Refraction: 1.445
Molar Refractivity: 47.21 cm³
Molar Volume: 177.3 cm³
Surface Tension: 22.2 dyne/cm
Density: 0.88 g/cm³
Flash Point: 36.7 °C
Enthalpy of Vaporization: 37.53 kJ/mol
Boiling Point: 154.6 °C at 760 mmHg
Vapour Pressure: 4.04 mmHg at 25°C
InChI: InChI=1/C₈H₁₆OSi/c1-10(2,3)9-8-6-4-5-7-8/h6H,4-5,7H2,1-3H3
InChIKey: UBMYYGXGMPGCBO-UHFFFAOYAB
Std. InChI: InChI=1S/C₈H₁₆OSi/c1-10(2,3)9-8-6-4-5-7-8/h6H,4-5,7H2,1-3H3
Std. InChIKey: UBMYYGXGMPGCBO-UHFFFAOYSA-N

Hazard Codes: Xi
Risk Statements: 10-36/37/38 
R10:Flammable. 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36
 S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing.
RIDADR: UN 1993 3/PG 3
WGK Germany: 3
F: 10-21
TSCA: Yes
HazardClass: 3.2
PackingGroup: III

  1-(Trimethylsiloxy)cyclopentene (CAS No.19980-43-9), its synonyms are (Cyclopent-1-en-1-yloxy)(trimethyl)silane ; 1-(Trimethylsiloxy)-1-cyclopentene ; 1-Trimethylsiloxycyclopentene .