256342-39-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 256342-39-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,6,3,4 and 2 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 256342-39:
(8*2)+(7*5)+(6*6)+(5*3)+(4*4)+(3*2)+(2*3)+(1*9)=139
139 % 10 = 9
So 256342-39-9 is a valid CAS Registry Number.
256342-39-9Relevant articles and documents
Synthesis of thiophene/phenylene co-oligomers. II [1]. Block and alternating co-oligomers
Hotta,Kimura,Lee,Tamaki
, p. 281 - 286 (2007/10/03)
We report the synthesis of block and alternating thiophene/phenylene co- oligomers that is based either on the Suzuki coupling reaction or on the Grignard reaction. These reaction schemes enable us to obtain the target compounds at reasonably high yields.