935-07-9Relevant articles and documents
Shaken, not stirred: a schools test for aldehydes and ketones
Plater, M John
, p. 104 - 107 (2019/11/22)
A schools test for aldehydes and ketones in water at room temperature using test tubes has been developed in this laboratory using either phenylhydrazine hydrochloride or phenylhydrazine hydrochloride with NaOAc . 3H2O. The role of one equivalent of a strong or weak acid which catalyses the reaction is discussed.
Polyaromatic hydrocarbon derivatized azo-oximes of cobalt(iii) for the ligand-redox controlled electrocatalytic oxygen reduction reaction
Dinda, Soumitra,Roy, Syamantak,Patra, Sarat Chandra,Bhandary, Subhrajyoti,Pramanik, Kausikisankar,Ganguly, Sanjib
, p. 3737 - 3747 (2020/03/17)
A pair of ligands HLPyr1a and HLAnc1b (Pyr = pyrene, Anc = anthracene) incorporating π-electron-rich polycyclic aromatic hydrocarbons (PAHs), viz. pyrene and anthracene moieties respectively, in conjunction with electron-poor azo-oxime groups was synthesized. The tris complexes [CoIII(LPyr)3] 2a and [CoIII(LAnc)3] 2b were also prepared and structurally authenticated by X-ray diffraction. They exhibit significant redox and optoelectronic properties, which were analyzed by density functional theory (DFT) and time dependent density functional theory (TD-DFT). Theoretical investigation further revealed that the coordinated ligands act as superior electron reservoirs in comparison to the free ligands and transfer electrons through the PAH moieties. This property was smartly exploited to scrutinize the aptitude of the cobalt(iii) complexes for the electrocatalytic oxygen reduction reaction (ORR). The catalytic process proceeds via a 4-electron transfer pathway to form hydroxide ions in alkaline medium. The role of the PAHs in the complexes 2a and 2b in providing a pool of electrons was further emphasized via substituting them with phenyl groups, as in [CoIII(LPh)3] 2c, when the catalytic ORR activity was significantly diminished. Moreover, the activity was completely lost when the PAHs were replaced by methyl groups, as in [CoIII(LMe)3] 2d.
Oxidized single-walled carbon nanotubes (swcns-cooh) as a new catalyst for the protection of carbonyl groups as hydrazones
Borazjani, Maryam Kiani,Safaei, Hamid Reza,Panahandeh, Majid,Kiani, Ali Reza,Kiani, Masoumeh,Mofarahi, Masoud
, p. 279 - 281 (2013/12/04)
Nano-materials are considered as suitable heterogeneous catalysts for many organic reactions. Herein oxidized carbon nanotube (SWCNTs-COOH) has been reported as a heterogeneous catalyst, for protection of carbonyl groups as hydrazones in EtOH at 80 C. The reactions proceed smoothly with good to excellent yields, and the SWCNTs-COOH used can be recycled.
