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115819-33-5

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115819-33-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 115819-33-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,5,8,1 and 9 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 115819-33:
(8*1)+(7*1)+(6*5)+(5*8)+(4*1)+(3*9)+(2*3)+(1*3)=125
125 % 10 = 5
So 115819-33-5 is a valid CAS Registry Number.

115819-33-5Relevant articles and documents

THE THERMAL REARRNGEMENT OF 2-ARYL-1-CYANOINDAZOL-3-ONES

Bird, C. W.,Kapili, M.

, p. 4621 - 4624 (1987)

A range of 2-aryl-1-cyanoindazol-3-ones has been prepared and their thermal rearrangement to the corresponding benzimidazoquinazolones investigated.Quantitative studies using differential scanning calorimetry have provided rates, energies and entropies of activation.The rates of rearrangement of the 2-(p-substituted-phenyl) compounds are shown to be correlated by the Hammett relationship using ?+ rather than ? substituent constants.In the case of the 2-(2,6-dimethylphenyl) and 2-(2,4,6-trimethylphenyl) compounds rearrangement is accompanied by sigmatropic shifts of the obstructing methyl groups.

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