139494-38-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139494-38-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,4,9 and 4 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 139494-38:
(8*1)+(7*3)+(6*9)+(5*4)+(4*9)+(3*4)+(2*3)+(1*8)=165
165 % 10 = 5
So 139494-38-5 is a valid CAS Registry Number.
139494-38-5Relevant articles and documents
Highly Substituted Cyclopentadienes with Methylthio and Methylsulfonyl Groups
Hartke, Klaus,Lee, Kyung-Hee
, p. 413 - 414 (2007/10/02)
Sodium cyclopentadiene (1) reacts with S-methyl methanethiosulfonate (2) to yield the hexakis(methylthio)cyclopentadiene (3), which is transformed into the pentakis(methylthio)cyclopentadienides 4 by S-nucleophiles.Oxidation of 4 gives rise to pentakis(me