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102519-81-3

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102519-81-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 102519-81-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,2,5,1 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 102519-81:
(8*1)+(7*0)+(6*2)+(5*5)+(4*1)+(3*9)+(2*8)+(1*1)=93
93 % 10 = 3
So 102519-81-3 is a valid CAS Registry Number.

102519-81-3Relevant articles and documents

Attempted Synthesis of a Stable, Quintet, Tetraphenoxyl Tetraradical: Facile Rearrangement of a Substituted Bicyclobutane

Anderson, Kraig K.,Shultz, David A.,Dougherty, Dennis A.

, p. 7575 - 7584 (2007/10/03)

The preparation of tetraphenol 3 and its attempted oxidation to tetraradical 2 are described. Tetraphenoxyl 2 was envisioned as a more stable analog of the previously reported, quintet tetraradical 1. However, EPR studies on 3 and model compounds and crystallographic characterization of the product from oxidation of 3 suggest that 2 is not a viable target. Apparently, 2 or an intermediate in the multistep oxidation path leading to it undergoes a ring closure to a bicyclobutane. The bicyclobutane, in turn, undergoes a surprisingly facile rearrangement to the analogous butadiene structure.

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