109709-51-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109709-51-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,7,0 and 9 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 109709-51:
(8*1)+(7*0)+(6*9)+(5*7)+(4*0)+(3*9)+(2*5)+(1*1)=135
135 % 10 = 5
So 109709-51-5 is a valid CAS Registry Number.
109709-51-5Relevant articles and documents
The Extremely Rapid Acid-catalysed Additions of Acetylenes to and the Synthesis of
Higgins, Simon J.,Shaw, Bernard L.
, p. 1629 - 1630 (1986)
The addition of acetylenes such as HCCH, HCCPh, or MeOOCCCCOOMe to to give 'dimetallated olefins' is catalysed by traces of acid or methanol but inhibited by a base: the 'dimetallated olefin' complex makes an interesting comparison with the vinylidene complex .