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704-59-6

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704-59-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 704-59-6 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 7,0 and 4 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 704-59:
(5*7)+(4*0)+(3*4)+(2*5)+(1*9)=66
66 % 10 = 6
So 704-59-6 is a valid CAS Registry Number.

704-59-6Relevant articles and documents

Thermal valence isomerization of cis-fused bicyclic cyclobutenes. A study of orbital symmetry control

Dauben, William G.,Michno, Drake M.

, p. 2284 - 2292 (2007/10/19)

This study shows that thermally promoted valence isomerizations of cis-fused bicyclic cyclobutenes, when free of steric constraint, yield products arising from both orbital symmetry allowed conrotatory openings of the labile σ bond in the cyclobutene ring. In the case of the related vinylcyclobutenes, one conrotatory mode produces a stable cis,trans,cis monocyclic triene whereas fission in the other allowed sense affords a thermally labile trans,cis,cis monocyclic triene which, in turn, cyclizes to yield a cyclohexadiene derivative. The product distributions are evaluated in terms of secondary orbital interactions.

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