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1321994-07-3

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1321994-07-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1321994-07-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,2,1,9,9 and 4 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1321994-07:
(9*1)+(8*3)+(7*2)+(6*1)+(5*9)+(4*9)+(3*4)+(2*0)+(1*7)=153
153 % 10 = 3
So 1321994-07-3 is a valid CAS Registry Number.

1321994-07-3Upstream product

1321994-07-3Downstream Products

1321994-07-3Relevant articles and documents

Intramolecular hydrogen-atom tunneling and photoreaction mechanism of 4-bromo-2-chloro-6-fluorophenol in low-temperature argon matrices

Nanbu, Shota,Sekine, Masahiko,Nakata, Munetaka

, p. 69 - 73,5 (2012)

Infrared spectra of 4-bromo-2-chloro-6-fluorophenol in low-temperature argon matrices were measured with an FTIR spectrometer. Despite that an F-type geometrical isomer, which has an intramolecular hydrogen bond of OH...F, is as stable in the CCl4 solution at room temperature as a Cl-type geometrical isomer, which has that of OH...Cl, no infrared bands of the F-type were observed in an argon matrix at 20 K. This implied that the F-type changed to the more stable Cl-type by hydrogen-atom tunneling in the argon matrix. To confirm the tunneling isomerization, similar experiments on the deuterated species were performed, resulting in that an OD stretching band of the F-type appeared as well as that of the Cl-type. This finding suggested that a deuterium is inhibited from the tunneling migration. The UV-induced photoreaction pathways of 4-bromo-2-chloro-6-fluorophenol were additionally examined, resulting in that 2-fluoro-4-bromocyclopentadienylidenemethanone was produced from the Cl-type by Wolff rearrangement after dissociation of the H atom in the OH group and the Cl atom. However no cyclohexadienone derivative, which is analogous to a photoproduct of a parent molecule, 2-chloro-6- fluorophenol, was produced upon UV irradiation. It is concluded that the bromine atom located at the 4th position disturbs the intramolecular migration of the Cl atom.

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