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81639-84-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81639-84-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,3 and 9 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 81639-84:
151 % 10 = 1
So 81639-84-1 is a valid CAS Registry Number.

81639-84-1Relevant articles and documents

The Photochemistry of 1-Cyano-2-methyl-3-phenylpropene and Ring substituted Derivatives

Ferreira, Aurelio B. B.,Salisbury, Kingsley

, p. 25 - 30 (2007/10/02)

The E- and Z-isomers of 1-cyano-2-methyl-3-phenylpropene and ring-substituted derivatives of the E-isomer, are shown to fluoresce and undergo Z-E-isomerization and di-?-methane rearrangement on irradiation.The rate constants for these processes, obtained from fluorescence lifetimes and quantum yields, can be analysed in terms of an initial interaction between the two ? systems, facilitated by partial charge-transfer, followed by two diverging pathways, one, towards a diradicaloid species leading to cyclopropane formation, the other towards a 'zwitterionic' species and relaxation to the ground state and resulting in singlet state Z-E-isommerization.

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