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656-84-8

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656-84-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 656-84-8 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,5 and 6 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 656-84:
(5*6)+(4*5)+(3*6)+(2*8)+(1*4)=88
88 % 10 = 8
So 656-84-8 is a valid CAS Registry Number.

656-84-8Relevant articles and documents

CuI-Catalyzed Pentafluoroethylation of Aryl Iodides in the Presence of Tetrafluoroethylene and Cesium Fluoride: Determining the Route to the Key Pentafluoroethyl CuI Intermediate

Ohashi, Masato,Ishida, Naoyoshi,Ando, Kota,Hashimoto, Yu,Shigaki, Anna,Kikushima, Kotaro,Ogoshi, Sensuke

supporting information, p. 9794 - 9798 (2018/07/25)

The Cu(I)-catalyzed pentafluoroethylation of iodoarenes via the fluorocupration of tetrafluoroethylene (TFE) is disclosed. The active species, (phen)CuC2F5, was isolated and its molecular structure confirmed by a single-crystal X-ray diffraction analysis. The key to the successful suppression of the competing oligomerization of TFE is to refrain from stirring the reaction mixture. A mechanistic study clearly discarded the possibility that the catalytic reaction proceeds via a radical pathway.

A Convenient Method for Catalytic Aromatic Pentafluoroethylation Using Potassium (Pentafluoroethyl)trimethoxyborate

Sugiishi, Tsuyuka,Kawauchi, Daisuke,Sato, Mizuki,Sakai, Tatsuya,Amii, Hideki

, p. 1874 - 1878 (2017/04/06)

A method for the copper-catalyzed pentafluoroethylation of aryl iodides using potassium (pentafluoroethyl)trimethoxyborate has been developed. The borate was found to be a convenient pentafluoroethyl source. In parallel, it was found that the solvent, as well as ligand, makes significant impact on the catalytic perfluoroalkylations.

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