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223761-49-7

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223761-49-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 223761-49-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,3,7,6 and 1 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 223761-49:
(8*2)+(7*2)+(6*3)+(5*7)+(4*6)+(3*1)+(2*4)+(1*9)=127
127 % 10 = 7
So 223761-49-7 is a valid CAS Registry Number.

223761-49-7Downstream Products

223761-49-7Relevant articles and documents

Synthesis of stacked 'push-pull' acetylenes

Berger, Daniel,Wilhelm, Patrick,Neuenschwander, Markus

, p. 326 - 337 (2007/10/03)

In view of possible solid-state polymerizations of crystalline stacked 'push-pull'-acetylenes 1, a series of compounds 1 has been synthesized (Scheme 3), and the results of X-ray analyses of 'push-pull'-acetylenes 1d,e,f are discussed. Of these three compounds, methyl 2-morpholinoacetylene carboxylate (1d) is by far the best candidate giving crystals with nicely stacked molecules (Fig. 3), Even in this case, however, stacking parameters d = 4,12 A and a = 31,6°are too large for allowing solid-state polymerizations.

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