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187862-40-4

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187862-40-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 187862-40-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,7,8,6 and 2 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 187862-40:
(8*1)+(7*8)+(6*7)+(5*8)+(4*6)+(3*2)+(2*4)+(1*0)=184
184 % 10 = 4
So 187862-40-4 is a valid CAS Registry Number.

187862-40-4Relevant articles and documents

Photolysis of Alkyl Aryl Sulfoxides: α-Cleavage, Hydrogen Abstraction, and Racemization

Guo, Yushen,Jenks, William S.

, p. 857 - 864 (1997)

The photochemistry of a series of alkyl aryl sulfoxides is described. The initial event of the photolysis process is homolytic cleavage to form sulfinyl/alkyl radical pairs. The radical pair partitions between recombination to starting material, formation of sulfenic esters, disproportionation to an olefin and benzenesulfenic acid, and formation of typical radical escape products. The quantum yield for conversion depends on the structure or the reactivity of the alkyl radical, with the sequence benzyl > tertiary alkyl > secondary alkyl > primary alkyl > (di)aryl. The high racemization efficiency of some aryl primary-alkyl sulfoxides suggests that another nonradical pathway for the photoracemization process may exist. Product analysis does not support any hydrogen abstraction pathways.

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