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41791-18-8

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41791-18-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 41791-18-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,1,7,9 and 1 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 41791-18:
(7*4)+(6*1)+(5*7)+(4*9)+(3*1)+(2*1)+(1*8)=118
118 % 10 = 8
So 41791-18-8 is a valid CAS Registry Number.

41791-18-8Downstream Products

41791-18-8Relevant articles and documents

SYNTHESES AND PHYSICAL PROPERTIES OF SEVERAL POLYPHENYLENES CONTAINING MIXED LINKAGES.

Fujioka

, p. 3494 - 3506 (2007/10/02)

Fourteen macrocyclic polyphenylenes, including ten new compounds, were synthesized by intra- or intermolecular homo-coupling of di-Grignard compound and by cross-coupling of two kinds of di-Grignard compounds with copper(II) chloride, **1H NMR spectra of the polyphenylenes, compared with those of open-chain analogues, provide valuable information on the nonplanar spacial relationship of constituting phenylene rings. UV spectra of the compounds containing p-phenylene ring(s) suggest that the lack or decrease in intensity of K-band above ca. 260 nm or a marked shift of that band provides useful conformational information. Empirical Hueckel molecular orbital calculations of longest-wavelength absorption bands of twelve polyphenylenes were also carried out.

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