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HomeProduct name list7,7-Dichlorobicyclo[3.2.0]hept-2-en-6-one

7,7-Dichlorobicyclo[3.2.0]hept-2-en-6-one

  • CAS NO.:5307-99-3
  • Empirical Formula: C7H6Cl2O
  • Molecular Weight: 177.03
  • MDL number: MFCD00013738
  • EINECS: 226-165-0
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2023-04-23 13:52:06
7,7-Dichlorobicyclo[3.2.0]hept-2-en-6-one Structural

What is 7,7-Dichlorobicyclo[3.2.0]hept-2-en-6-one?

Chemical properties

clear brown liquid

Synthesis

Under nitrogen protection, to a solution of dichloracetyl chloride (34 g, 0.23 mol) and cyclopentadiene(60 ml, 0.7 mol) in pentane (230 ml), heated to reflux in a three-necked flask with constant pressure funnel and condenser tube, was added dropwise via funnel triethylamine (24 g, 0.24 mol) in pentane (100 ml) with mechanical stirring during 4 hours, and a lot of white triethylamine hydrochloride was produced. After reflux for 2 hours, water (80 ml) was added to dissolve the triethylamine hydrochloride. The reaction mixture was extracted with pentane (2 × 60ml). The combined extracts were filtered and dried over anhydrous Na2SO4, and concentrated in vacuo to give brownish black oil. Fraction of reduced pressure distillation at 83~87 °C/400 Pa was collected to give 7,7-Dichlorobicyclo[3.2.0]hept-2-en-6-one (2, 33.5 g) as a colorless oil.

Properties of 7,7-Dichlorobicyclo[3.2.0]hept-2-en-6-one

Boiling point: 58-64 °C (0.5 mmHg)
Density  1.44±0.1 g/cm3(Predicted)
refractive index  1.5150
Flash point: 127-128°C/25mm
storage temp.  Refrigerator (+4°C)
color  Clear, dark orange
BRN  2045059
CAS DataBase Reference 5307-99-3(CAS DataBase Reference)

Safety information for 7,7-Dichlorobicyclo[3.2.0]hept-2-en-6-one

Signal word Danger
Pictogram(s)
ghs
Corrosion
Corrosives
GHS05
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H302:Acute toxicity,oral
H314:Skin corrosion/irritation
H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
Precautionary Statement Codes P264:Wash hands thoroughly after handling.
P264:Wash skin thouroughly after handling.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P310:Immediately call a POISON CENTER or doctor/physician.
P321:Specific treatment (see … on this label).
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P332+P313:IF SKIN irritation occurs: Get medical advice/attention.
P337+P313:IF eye irritation persists: Get medical advice/attention.

Computed Descriptors for 7,7-Dichlorobicyclo[3.2.0]hept-2-en-6-one

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