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823-70-1

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823-70-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 823-70-1 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 8,2 and 3 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 823-70:
(5*8)+(4*2)+(3*3)+(2*7)+(1*0)=71
71 % 10 = 1
So 823-70-1 is a valid CAS Registry Number.

823-70-1SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 19, 2017

Revision Date: Aug 19, 2017

1.Identification

1.1 GHS Product identifier

Product name 7,7-difluorobicyclo[4.1.0]heptane

1.2 Other means of identification

Product number -
Other names 7,7-difluoronorcarane

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:823-70-1 SDS

823-70-1Relevant articles and documents

Mechanistic Studies on Zinc-Induced Addition of CF2Br2 to Olefins. A Novel Radical Reductive Cyclopropanation on the Zinc Surface

Wu, Shi-Hui,Liu, Wei-Zhong,Jiang, Xi-Kui

, p. 854 - 857 (2007/10/02)

The addition reaction of dibromodifluoromethane (1) to olefins induced by zinc in ethereal solvent differs surprisingly from addition reactions hitherto reported.Both cyclopropane derivatives and 1:1 addition products were obtained from this reaction.A free-radical chain addition reaction induced by single electron transfer (SET) is proposed.This reaction is inhibited by hydroquinone and completely quenched by p-dinitrobenzene.The nature of the 1:1 adducts formed revealed the character of a typical radical reaction.The nature of the cyclopropane derivatives formed was also much different from the usual cyclopropane adduct derived from carbene addition.When diallyl ether (15) and norbornadiene (16) were used as substrates, only rearranged 1:1 addition products could be obtained, and no cyclopropane product could be detected.The results of addition reactions with 4-octenes (27) showed also that the cyclopropanation reaction was not stereospecific.On the basis of the above-mentioned results, a novel reductive debromocyclopropanation reaction of the γ-bromopropyl radical intermediate proceeding on the zinc metal surface is suggested.

Cyclopropane Chemistry. Part 4. The Reactions of 1,2,2-Trifluoroethylidene with Alkenes and Pyrolysis of the Resulting Cyclopropanes

Haszeldine, Robert N.,Rowland, Ronald,Speight, James G.,Tipping, Anthony E.

, p. 314 - 324 (2007/10/02)

1,2,2-Trifluoroethylidene, generated by the pyrolysis of (1,1,2,2-tetrafluoroethyl)trifluorosilane, reacts with tetrafluoroethylene, ethylene, and a series of methyl-substituted ethylenes to give the corresponding 1-fluoro-1-difluoromethylcyclopropanes in good yield; cyclohexene gives the corresponding norcarane, and tris(trifluoromethyl)phosphine gives the corresponding phosphorane (CF3)3P(+)-C(-)F-CHF2.Pyrolysis of 1,2,2,3,3-pentafluoro-1-difluoromethylcyclopropane affords difluorocarbene and 3H-pentafluoropropene, but pyrolysis of the methyl-substituted cyclopropanes results in the formation of dienes in high yield, e.g. the 1,4-dienes CHF=CF-CMeR-CMe=CH2 from the cyclopropanes (R = H or Me) or 1,3-dienes from the methyl-substituted cyclopropanes, e.g. --> CH2=CMe-C(CHF2)=CH2.In certain cases further dehydrofluorination of the 1,3-dienes affords trienes, e.g. --> CH2=CMe-C(=CHF)-CMe=CH2.

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