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109183-33-7

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109183-33-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109183-33-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,1,8 and 3 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 109183-33:
(8*1)+(7*0)+(6*9)+(5*1)+(4*8)+(3*3)+(2*3)+(1*3)=117
117 % 10 = 7
So 109183-33-7 is a valid CAS Registry Number.

109183-33-7Downstream Products

109183-33-7Relevant articles and documents

Mechanism of Intramolecular Photocycloadditions of Cyclooctenones

Pirrung, Michael C.,Webster, Nicholas J. G.

, p. 3603 - 3613 (2007/10/02)

The intramolecular photochemical cycloadditions of a number of 4'-substituted (3'-butenyloxy)-cyclooctenones have been studied.Two classes of substrates were found.One class (phenyl- and vinyl-substituted) forms adducts in an efficient reaction, while the rest of the compounds from photoproducts slowly and in low yield.The behavior of a carbon analogue shows that rotational relaxation of the cyclooctenone triplet is faster than cycloaddition.Based on quenching and sensitization studies, it has been suggested that the substituent effect is indicative of an enhanced rate of cyclization to form a 1,4-biradical.

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