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83933-44-2

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83933-44-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 83933-44-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,9,3 and 3 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 83933-44:
(7*8)+(6*3)+(5*9)+(4*3)+(3*3)+(2*4)+(1*4)=152
152 % 10 = 2
So 83933-44-2 is a valid CAS Registry Number.

83933-44-2Downstream Products

83933-44-2Relevant articles and documents

Polyhalogeno-allenes and -acetylenes. Part 14. The reactions of Perfluoro-1,2-dienes with Dichloro- and Difluoro-carbene, and a New Route to 1,1-Dichloroperfluoro-1,2-dienes

Bosbury, Paul W. L.,Fields, Roy,Haszeldine, Robert N.,Lomax, G. Robert

, p. 2203 - 2206 (2007/10/02)

Perfluoro-1,2-dienes RF(CF3)C=C=CF2 (RF = CF3 or n-C3F7) react in the gas phase with difluoro- and dichlorocarbene to give methylenecyclopropanes RF(CF3)CCF2C=CX2 (RF = CF3, n-C3F7; X = F, Cl) in good yield by an addition-rearrangement sequence.Pyrolysis of 1-dichloromethylene-3,3-difluoro-2,2-bis(trifluoromethyl)cyclopropane results in extrusion of difluorocarbene and the formation of 1,1-dichloro-4,4,4-trifluoro-3-trifluoromethylbuta-1,2-diene in high yield.This new allene reacts readily with methanol and undergoes efficient Diels-Alder additions to the perfluoroalkyl-substituted double bond.

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