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73070-02-7

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73070-02-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 73070-02-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,0,7 and 0 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 73070-02:
(7*7)+(6*3)+(5*0)+(4*7)+(3*0)+(2*0)+(1*2)=97
97 % 10 = 7
So 73070-02-7 is a valid CAS Registry Number.

73070-02-7Downstream Products

73070-02-7Relevant articles and documents

[2+2] Photodimerization of bispyridylethylenes by a controlled shift of the protonation equilibrium

Yamada, Shinji,Kusafuka, Momoko,Sugawara, Mai

, p. 3997 - 4000 (2013)

Irradiation of trans-4,4′-bispyridylethylene in the presence of 1 equiv of concd HCl produced a syn dimer with high selectivity, whereas irradiation in the presence of more than 2 equiv of concd HCl or in the absence of HCl gave a mixture of dimers and by-products with much lower selectivity. This indicated that a suitable amount of acid served as a catalyst for the [2+2] photodimerization of BPEs through cation-π interactions between the pyridinium and pyridine rings.

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