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1645293-16-8

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1645293-16-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1645293-16-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,5,2,9 and 3 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1645293-16:
(9*1)+(8*6)+(7*4)+(6*5)+(5*2)+(4*9)+(3*3)+(2*1)+(1*6)=178
178 % 10 = 8
So 1645293-16-8 is a valid CAS Registry Number.

1645293-16-8Downstream Products

1645293-16-8Relevant articles and documents

High-yield formation of substituted tetracyanobutadienes from reaction of ynamides with tetracyanoethylene

Betou, Marie,Kerisit, Nicolas,Meledje, Esme,Leroux, Yann R.,Katan, Claudine,Halet, Jean-Francois,Guillemin, Jean-Claude,Trolez, Yann

supporting information, p. 9553 - 9557 (2014/08/18)

A high-yielding sequence of [2+2] cycloaddition-retroelectrocyclization of ynamides with tetracyanoethylene (TCNE) is described. The reaction provided tetracyanobutadiene (TCBD) species, which were characterized by various techniques. DFT and TD-DFT calculations were also performed to complement experimental findings. 2+2=Tetracyanobutadienes: The reaction between ynamides and tetracyanoethylene at room temperature in dichloromethane provides tetracyanobutadienes in good to quantitative yields, following a sequence of [2+2] cycloaddition-retroelectrocyclization (see scheme; EWG=electron- withdrawing group).

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