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205259-72-9

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205259-72-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 205259-72-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,5,2,5 and 9 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 205259-72:
(8*2)+(7*0)+(6*5)+(5*2)+(4*5)+(3*9)+(2*7)+(1*2)=119
119 % 10 = 9
So 205259-72-9 is a valid CAS Registry Number.

205259-72-9Relevant articles and documents

Aryl carbon-chlorine (Ar-Cl) and aryl carbon-fluorine (Ar-F) bond cleavages by rhodium porphyrins

Qian, Ying Ying,Lee, Man Ho,Yang, Wu,Chan, Kin Shing

, p. 82 - 89 (2015/06/08)

Aryl carbon-chlorine (Ar-Cl) bond cleavage has been achieved with rhodium(III) tetrakis-4-tolylporphyrin chloride (Rh(ttp)Cl) to give Rh(ttp)Ar. For 4-chlorofluorobenzene, the aryl carbon-fluorine (Ar-F) bond cleavage competes with the Ar-Cl bond cleavage. Mechanistic investigations show that the Ar-Cl bond cleavage goes through metalloradical ipso-substitution mechanism, while the Ar-F bond cleavage goes through nucleophilic aromatic substitution. The selectivity of the Ar-F or Ar-Cl bond cleavage can be controlled by tuning the temperature and substrate concentration.

Effects of p-substituents on electrochemical CO oxidation by Rh porphyrin-based catalysts

Yamazaki, Shin-Ichi,Yamada, Yusuke,Takeda, Sahori,Goto, Midori,Ioroi, Tsutomu,Siroma, Zyun,Yasuda, Kazuaki

experimental part, p. 8968 - 8976 (2011/04/25)

Electrochemical CO oxidation by several carbon-supported rhodium tetraphenylporphyrins with systematically varied meso-substituents was investigated. A quantitative analysis revealed that the p-substituents on the meso-phenyl groups significantly affected CO oxidation activity. The electrocatalytic reaction was characterized in detail based on the spectroscopic and X-ray structural results as well as electrochemical analyses. The difference in the activity among Rh pophyrins is discussed in terms of the properties of p-substituents along with a proposed reaction mechanism. Rhodium tetrakis(4-carboxyphenyl)porphyrin (Rh(TCPP)), which exhibited the highest activity among the porphyrins tested, oxidized CO at a high rate at much lower potentials (2 oxidation activity, in contrast to Pt-based catalysts.

Synthesis of rhodium porphyrin aryls via intermolecular arene carbon-hydrogen bond activation

Zhou, Xiang,Li, Qi,Mak, Thomas C.W.,Chan, Kin Shing

, p. 551 - 554 (2008/10/08)

(meta-Cyanophenyl) rhodium porphyrins have been synthesized from the selective activation of a meta carbon-hydrogen bond of PhCN via the reaction of RhCl3 with porphyrins in refluxing PhCN.

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