666236-39-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 666236-39-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,6,2,3 and 6 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 666236-39:
(8*6)+(7*6)+(6*6)+(5*2)+(4*3)+(3*6)+(2*3)+(1*9)=181
181 % 10 = 1
So 666236-39-1 is a valid CAS Registry Number.
666236-39-1Relevant articles and documents
Stereochemistry of the [2+4] cycloaddition of cyclopentyne
Gilbert, John C.,Hou, Duen-Ren
, p. 469 - 474 (2007/10/03)
The [2+4] cycloaddition of cyclopentyne with a pair of diastereomeric 1,3-dienes is found to occur with high stereoselectivity. The results support the applicability of the principles of orbital symmetry even in the case of this exceedingly reactive dienophile.