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2948-13-2

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2948-13-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 2948-13-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,9,4 and 8 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 2948-13:
(6*2)+(5*9)+(4*4)+(3*8)+(2*1)+(1*3)=102
102 % 10 = 2
So 2948-13-2 is a valid CAS Registry Number.

2948-13-2Relevant articles and documents

Determination of aromaticity indices of thiophene and furan by nuclear magnetic resonance spectroscopic analysis of their phenyl esters

Lee, Chang Kiu,Yu, Ji Sook,Lee, Hye-Jin

, p. 1207 - 1217 (2007/10/03)

A series of m- and p-substituted phenyl benzoates, 2-thienoates, and 2-furoates were prepared and their 1H and 13C nmr spectroscopic characteristics were examined. In general, good correlations were observed between the chemical shift values of protons and carbons of the acyl aromatic rings and the Hammett σ. Plots of the chemical shift values of the carbonyl carbons of the benzoates against those of the 2-thienoates and 2-furoates gave an excellent correlation and the values of the slopes are 0.85 and 0.75, respectively, in dimethyl sulfoxide-d6 and 0.90 and 0.78, respectively, in chloroform-d. The values could be considered as a set of aromaticity indices.

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