21170-10-5

21170-10-5 structure
21170-10-5 structure
  • Name: cis-1,5-dimethylbicyclo[3.3.0]octane-3,7-dione
  • Chemical Name: 3a,6a-dimethyl-1,3,4,6-tetrahydropentalene-2,5-dione
  • CAS Number: 21170-10-5
  • Molecular Formula: C10H14O2
  • Molecular Weight: 166.21700
  • Create Date: 2018-12-28 12:11:13
  • Modify Date: 2024-01-02 22:06:45
  • Olefination of cis-1,5-dimethylbicyclo[3.3.0]octane-3,7-dione with (carbethoxyethylidene)triphenylphospharane under controlled microwave heating has been investigated. It reacts with carbon disulfide, strong base and an alkylating agent in dipolar aprotic solvents to yield racemic mixtures of 2-dialkylthio-methylene compounds.

Name 3a,6a-dimethyl-1,3,4,6-tetrahydropentalene-2,5-dione
Synonyms 1,5-dimethyl-bicyclo<3.3.0>octandion
1,5-Dimethylbicyclo<3.3.0>octan-3,7-dione
cis-3a,6a-Dimethyltetrahydropentalene-2,5(1H,3H)-dione
EINECS 244-255-8
1,5-Dimethylbicyclo<3.3.0>octan-3,7-dion
rel-(3aR,6aR)-3a,6a-diMethyl-octahydropentalene-2,5-dione
3A,6A-DIMETHYLPERHYDROPENTALENE-2,5-DIONE
1,5-dimethylbicyclo<3.3.0>octane-3,7-dione
cis-tetrahydro-3a,6a-dimethylpentalene-2,5(1H,3H)-dione
cis-1,5-dimethylbicyclo<3.3.0>octane-3,7-dione
MFCD00003772
Density 1.142g/cm3
Boiling Point 257.5ºC at 760 mmHg
Melting Point 228-230ºC(lit.)
Molecular Formula C10H14O2
Molecular Weight 166.21700
Flash Point 95ºC
Exact Mass 166.09900
PSA 34.14000
LogP 1.72480
Vapour Pressure 0.0145mmHg at 25°C
Index of Refraction 1.522
Personal Protective Equipment Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
Hazard Codes Xi
Safety Phrases 24/25
RIDADR NONH for all modes of transport
WGK Germany 3

~83%

21170-10-5 structure

21170-10-5

Literature: Coates, Robert M.; Shach, Shrenik K.; Mason, Robert W. Journal of the American Chemical Society, 1982 , vol. 104, # 8 p. 2198 - 2208