6634-82-8 Usage
Chemical Properties
Purple Solid
Check Digit Verification of cas no
The CAS Registry Mumber 6634-82-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,6,3 and 4 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 6634-82:
(6*6)+(5*6)+(4*3)+(3*4)+(2*8)+(1*2)=108
108 % 10 = 8
So 6634-82-8 is a valid CAS Registry Number.
InChI:InChI=1/C14H12N2O8S2.2Na/c15-11-5-3-9(13(7-11)25(19,20)21)1-2-10-4-6-12(16(17)18)8-14(10)26(22,23)24;;/h1-8H,15H2,(H,19,20,21)(H,22,23,24);;/q;2*+1/p-2/b2-1+;;
6634-82-8Relevant articles and documents
SYNTHESIS AND TRANSFORMATIONS OF 2,7-DISUBSTITUTED BENZOTHIENOBENZOTHIOPHENES
Zherdeva, S. Yu.,Barudi, A.,Zheltov, A. Ya.,Stepanov, B. I.
, p. 383 - 390 (2007/10/02)
A new method was developed for the synthesis of 2,7-disubstituted benzothienobenzothiophenes by the reaction of 4,4'-disubstituted 2,2'-stilbenedisulfonyl chloride with hydriodic acid and subsequent treatment of the reaction products with perbromopyridinium bromide.From 2,7-dinitrobenzothienobenzothiophene a series of new derivatives containing various electron-donating and electron-withdrawing substituents were obtained.
