136880-40-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 136880-40-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,8,8 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 136880-40:
(8*1)+(7*3)+(6*6)+(5*8)+(4*8)+(3*0)+(2*4)+(1*0)=145
145 % 10 = 5
So 136880-40-5 is a valid CAS Registry Number.
136880-40-5Relevant academic research and scientific papers
Reductive Coupling of 2-Propyn-1-ones Promoted by Yb Metal or YbCl3-Zn
Takaki, Ken,Nagase, Kyoko,Beppu, Fumikazu,Shindo, Takaaki,Fujiwara, Yuzo
, p. 1669 - 1672 (2007/10/02)
Ytterbium metal promotes reductive coupling of 2-propyn-1-ones (1) to give cyclobutenes and 1,6-dioxo-2,4-hexadiene, whereas 1 is converted to 2,5-dihydrofurans on the treatment with YbCl3-Zn.
