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.