Cas 137123-59-2,1H-Pyrrole-3-acetonitrile, a-(1,5-dihydro-3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-ylidene)-1-methyl-

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Check Digit Verification of cas no

The CAS Registry Mumber 137123-59-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,1,2 and 3 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 137123-59:
(8*1)+(7*3)+(6*7)+(5*1)+(4*2)+(3*3)+(2*5)+(1*9)=112
112 % 10 = 2
So 137123-59-2 is a valid CAS Registry Number.

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137123-59-2Relevant academic research and scientific papers

Preparation, Structure, and Color of 4-- and 4--1H-pyrazol-5(4H)-ones

Dworczak, Renate,Fabian, Walter M. F.,Sterk, Heinz,Kratky, Christoph,Junek, Hans

, p. 7 - 14 (2007/10/02)

(Dicyanomethylene)pyrazolones 1a, b are treated with some indoles and pyrroles.The resulting disubstituted malono-nitriles 2a-f, 4a-e, 6 yield cyanomethylene compounds 3a-f, 5a-e, 7 by irreversible thermal or photochemical decomposition.The compounds exist in different isomeric forms.Structures are proven by NMR spectroscopy and X-ray analysis.UV-Vis data are discussed by means of AM1 and INDO/S-CI calculations. Key Words: Calculations, AM1 and INDO, S-CI / Cyanomethylene compounds / Pyrazolones

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