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40957-08-2

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40957-08-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 40957-08-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,9,5 and 7 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 40957-08:
(7*4)+(6*0)+(5*9)+(4*5)+(3*7)+(2*0)+(1*8)=122
122 % 10 = 2
So 40957-08-2 is a valid CAS Registry Number.

40957-08-2Relevant articles and documents

SYNTHESIS AND STRUCTURES OF AROMATIC AND HETEROCYCLIC TELLURIUM COMPOUNDS. XXXI. REACTIONS OF ARYLTELLURIUM OXOCHLORIDES

Rivkin, B. B.,Maksimenko, A. A.,Sadekov, I. D.

, p. 1049 - 1055 (2007/10/02)

The reactions of aryltellurium oxochlorides with the lowest aliphatic acid anhydrides lead to diaryltellurium dichlorides, Te, and CO2 through the intermediate formation of diaryltellurium chloride diacylates.Aryltellurium trichlorides and carboxylic acid anhydrides are formed in the reaction with acyl chlorides.The chlorine atom in the tellurium oxochlorides is replaced by a phenyl group on reaction with phenyllithium.The reaction with dimedone in the presence of triethylamine leads to diaryl ditellurides and a product of trimerization of a carbene, viz., a dimedone derivative that is formed in the thermal decomposition of the intermediate ylid.

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