Cas 67442-77-7,4,4'-Octamethylenbis(ω-chloroacetophenone)

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Check Digit Verification of cas no

The CAS Registry Mumber 67442-77-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,4,4 and 2 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 67442-77:
(7*6)+(6*7)+(5*4)+(4*4)+(3*2)+(2*7)+(1*7)=147
147 % 10 = 7
So 67442-77-7 is a valid CAS Registry Number.

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67442-77-7Relevant academic research and scientific papers

Synthesis and Conformational Properties of Paracyclo(2,5)thiophenoparacyclophanes

Miyahara, Yuji,Inazu, Takahiko,Yoshino, Tamotsu

, p. 1177 - 1182 (2007/10/02)

Cyclic diketo sulfides 4 (n=3-8, 10) were condensed with glyoxal to give thiophenophanediones 6.The NMR, IR and UV spectral data of 6 are consistent with the following picture.The thiophene-2,5-dicarbonyl moiety in 6 (n=10) is in the mean molecular plane

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