209977-68-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 209977-68-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,9,9,7 and 7 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 209977-68:
(8*2)+(7*0)+(6*9)+(5*9)+(4*7)+(3*7)+(2*6)+(1*8)=184
184 % 10 = 4
So 209977-68-4 is a valid CAS Registry Number.
209977-68-4Relevant academic research and scientific papers
Benzo[1,2:4,5]bis(1,1,2,2-tetraisopropyldisilacyclobutene)
Kyushin, Soichiro,Kitahara, Tsukasa,Matsumoto, Hideyuki
, p. 471 - 472 (2007/10/03)
Benzo[1,2:4,5]bis(1,1,2,2-tetraisopropyldisilacyclobutene) (1) was synthesized. The X-ray crystal analysis shows that the benzene ring is deformed from the D6h symmetry. Compound 1 shows an intense 1Lb absorption band in t
