197773-99-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 197773-99-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,7,7 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 197773-99:
(8*1)+(7*9)+(6*7)+(5*7)+(4*7)+(3*3)+(2*9)+(1*9)=212
212 % 10 = 2
So 197773-99-2 is a valid CAS Registry Number.
197773-99-2Relevant academic research and scientific papers
Lanthanide catalysts for the hetero Diels-Alder reaction: Effect of ligand structure and acidity
Spine,Clouston,Berg
, p. 1047 - 1054 (2007/10/03)
A series of yttrium, ytterbium, and lanthanum hexa- or heptacoordinate complexes were prepared and their catalytic activities tested in the hetero Diels-Alder reaction between crotonaldehyde and ethyl vinyl ether. It was found that a pKa below
