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873981-29-4

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873981-29-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 873981-29-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,3,9,8 and 1 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 873981-29:
(8*8)+(7*7)+(6*3)+(5*9)+(4*8)+(3*1)+(2*2)+(1*9)=224
224 % 10 = 4
So 873981-29-4 is a valid CAS Registry Number.

873981-29-4Downstream Products

873981-29-4Relevant articles and documents

Reactions of Copper(II) Halides with Aromatic Compounds. Part XIII. The Mechanism of Halogenation of some Substituted 9-methylanthracenes.

Alcorn, William C.,Cromarty, Fiona M.,Flood, James,Mancilla, Jerson,Mosnaim, A. David,et al.

, p. 1620 - 1642 (2007/10/02)

Halogenations of 2-chloro-9-methylanthracene and 2,9-dimethylanthracene with copper(II) bromide in refluxing carbon tetrachloride and copper(II) chloride in refluxing chlorobenzene give exclusively the corresponding 10-halogenated products whereas brominations under radical conditions give the 9-bromoethyl compounds.These results support a mechanism involving direct attack by the copper(II) halide on the substrate, probably via a ?-complex between the copper(II) halide and the substituted anthracene, to give initially a 10-halogeno-9-methyl-9,10-dihydro-9-anthryl radical.Halogenation of 1,4,9-trimethylanthracene with copper(II) halides, a much slower reaction, is postulated to proceed by an electron-transfer mechanism.

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