Cas 202974-48-9,hydroxy-diphenyl-(pyrenyl-<sup>(1)</sup>)-methane

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Check Digit Verification of cas no

The CAS Registry Mumber 202974-48-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,2,9,7 and 4 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 202974-48:
(8*2)+(7*0)+(6*2)+(5*9)+(4*7)+(3*4)+(2*4)+(1*8)=129
129 % 10 = 9
So 202974-48-9 is a valid CAS Registry Number.

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202974-48-9Relevant articles and documents

Charge Delocalization Pathways in Persistent 1-Pyrenyl-, 4-Pyrenyl-, and 2-Pyrenylmethylcarbenium Ions as Models of PAH-Epoxide Ring Opening: NMR Studies in Superacids and AMI Calculations

Laali, Kenneth K.,Hansen, Poul Erik

, p. 5804 - 5810 (1997)

The relative stability, magnitude, and mode of charge delocalization into the pyrene moiety (Py) were evaluated for a series of tertiary and secondary 1-pyrenylmethylcarbenium ions PyC+R1R2 and PyC+R3

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202974-48-9