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15429-31-9

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15429-31-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 15429-31-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,5,4,2 and 9 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 15429-31:
(7*1)+(6*5)+(5*4)+(4*2)+(3*9)+(2*3)+(1*1)=99
99 % 10 = 9
So 15429-31-9 is a valid CAS Registry Number.

15429-31-9Relevant articles and documents

THIONE PHOTOCHEMISTRY. DUAL PATHWAYS IN ARALKYL THIONE CYCLIZATIONS

Basu, S.,Couture, Axel,Ho, Kam W.,Hoshino, Mikio,Mayo, Paul De,Suau, R.

, p. 246 - 254 (2007/10/02)

It is shown that aralkyl thiones, which posses an oxygen atom at the δ position in the side chain, can therefore not undergo the preferred δ insertion, and insert at the γ and ε positions.Although ε insertion occurs only from the 1(Π,Π*) state, γ abstraction ( followed by cyclization or cleavage ) occurs from both 1(Π,Π*) and 3(n,Π*) states.The quantum yields of photocyclization of 2c, 2d, and 2g change little with solvent polarity, which suggest that a thione-ether charge transfer interaction contributes little to the cyclization.Fluorescence and product quenching studies are reported which support this.

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