157281-28-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 157281-28-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,2,8 and 1 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 157281-28:
(8*1)+(7*5)+(6*7)+(5*2)+(4*8)+(3*1)+(2*2)+(1*8)=142
142 % 10 = 2
So 157281-28-2 is a valid CAS Registry Number.
157281-28-2Relevant academic research and scientific papers
Dibenzoannulenes Incorporating Two Diphenylhexatriene Units
Michels, Heinz-Peter,Nieger, Martin,Voegtle, Fritz
, p. 1167 - 1170 (2007/10/02)
The cyclophanehexaene hydrocarbon 6a and the dimethoxycyclophanehexaene 6b are prepared starting with the unsaturated diacid 1.An X-ray analysis of 6a exhibits a planar molecular skeleton.NMR and optical data prove a not fully conjugated macrocy
