5689-92-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5689-92-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,6,8 and 9 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 5689-92:
(6*5)+(5*6)+(4*8)+(3*9)+(2*9)+(1*2)=139
139 % 10 = 9
So 5689-92-9 is a valid CAS Registry Number.
5689-92-9Relevant academic research and scientific papers
Chemistry of 1,3-diarylpropynones in superacids
Vasilyev,Walspurger,Haouas,Sommer,Pale,Rudenko
, p. 3483 - 3489 (2007/10/03)
In superacids with H0 = -14 to -20, it has been found that 1,3-diarylpropynones ArC≡CCOAr′ are either protonated on oxygen of carbonyl groups with the formation of stable ions ArC≡CC(O +H)Ar′ or undergo further transformations when t