Adsorption and Oxidation of Aniline and Anisidine by Chromium Ferrocyanide

Alam, Tanveer; Tarannum, Hina; Ali, Shah Raj; Kamaluddin, .

doi:10.1006/jcis.2001.7968

Cited by 19 publications

(11 citation statements)

References 22 publications

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“…The addition of Mn(II) in the form of MnSO4, retards the rate of oxidation, indicating the involvement of a two-electron reduction of Cr(VI) to Cr(IV).A linear plot of log k1 versus 1/D with positive slope indicates that the involvement of a cation-dipole type of interaction in the rate determining step. The product formation is in accordance with the literature report [22]. The sequence of the oxidation is similar to that reported in the literature [23].…”

Section: Activation Parameterssupporting

confidence: 92%

Oxidation of Some Methoxy Anilines by Tetrabutylammoniumbromochromate in Aqueous Acetic Acid Medium: A Kinetics Study

Jabir¹,

Asghar²,

Mansoor³

2017

Asian J. Chem.

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The oxidation of aniline (A), 2,4-dimethoxy aniline (2,4-DMA), 2,6-dimethoxy aniline (2,6-DMA), 2,4,6-trimethoxy aniline (2,4,6-TMA) and 3,4,5-trimethoxy aniline (3,4,5-TMA) by tetrabutylammoniumbromochromate (TBABC) have been studied in 50 % acetic acid -50 % water medium in the presence of perchloric acid. The oxidation leads to the formation of the corresponding azobenzenes. The reaction is first order with respect to [TBABC], [S] and [H + ]. The reaction has been found to be catalyzed by H + ions. The reactions were studied at four different temperatures and thermodynamic parameters were calculated. The rates decreased in the order: 2,4,6-TMA > 2,6-DMA > 2,4-DMA > 3,4,5-TMA > aniline.

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Section: Activation Parameterssupporting

confidence: 92%

Oxidation of Some Methoxy Anilines by Tetrabutylammoniumbromochromate in Aqueous Acetic Acid Medium: A Kinetics Study

Jabir¹,

Asghar²,

Mansoor³

2017

Asian J. Chem.

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“…BHT was also observed in this sample with a retention time of 15.784 min. In addition to BHT and the primary ADPA peaks, several small peaks that are impurities were observed including an eluent with a retention time of 20.068 min and a m/z value of 169 (M + ), which was identified as diphenylamine (Scheme 1c) and another eluent with a retention time of 42.204 min, with preserved molecular fragments with m/z values of 210, 195, 184, and 167, matching diaminophenazine molecules (Scheme 1g or i).GC/MS with similar experimental conditions has been used to detect other related small molecules, such as benzoquinone (Scheme 1h), azobenzene (Scheme 1e), and substituted azobenzene etc 38. Similar methods were used to conduct GC/MS analysis of our intermediate aggregates in THF solution.…”

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confidence: 98%

Characterization of Reaction Intermediate Aggregates in Aniline Oxidative Polymerization at Low Proton Concentration

et al. 2010

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“…Although several adsorption studies of aromatic amines [11][12][13] and amino pyridines [14][15][16] on metal hexacyanoferrate(II) complexes have been carried out, to the best of our knowledge, no studies have been conducted with respect to metal(II) hexacyanocobaltate(III), that is MHCCo. Therefore, in the present study we have explored the adsorption of aromatic amines, namely aniline, 4-chloroaniline, 4-methylaniline and 4-methoxyaniline with MHCCo.…”

Section: Introductionmentioning

confidence: 99%

Adsorption and Oxidation of Aromatic Amines on Metal(II) Hexacyanocobaltate(III) Complexes: Implication for Oligomerization of Exotic Aromatic Compounds

et al. 2017

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Based on the hypothesis on the presence of double metal cyanides in the primordial oceans, a series of nano-sized metal(II) hexacyanocobaltate(III) (MHCCo) with the general formula: M 3 [Co(CN) 6 ] 2 ·xH 2 O (where M = Zn, Fe, Ni and Mn) has been synthesized. Surface interaction of aromatic amines, namely aniline, 4-chloroaniline, 4-methylaniline and 4-methoxyaniline with MHCCo particles has been carried out at the concentration range of 100-400 µM at pH~7.0. The percentage binding of aromatic amines on MHCCo surface was found to be in the range of 84%-44%. The trend in adsorption was in accordance to the relative basicity of the studied amines. At the experimental pH, amines reacted rapidly with the surface of the iron(II) hexacyanocobaltate, producing colored products that were analyzed by Gas Chromatography Mass Spectroscopy (GC-MS). GC-MS analysis of the colored products demonstrated the formation of dimers of the studied aromatic amines. Surface interaction of aromatic amines with MHCCo was studied by Fourier Transform Infrared (FT-IR) spectroscopy and Field Emission Scanning Electron Microscopy (FE-SEM). The change in amine characteristic frequencies, as observed by FT-IR, suggests that interaction took place through the NH 2 group on amines with metal ions of hexacyanocobaltate complexes. FE-SEM studies revealed the adherence of 4-methoxyaniline on zinc hexacyanocobaltate particles surface. We proposed that MHCCo might have been formed under the conditions on primitive Earth and may be regarded as an important candidate for concentrating organic molecules through the adsorption process.

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Adsorption and Oxidation of Aniline and Anisidine by Chromium Ferrocyanide

Cited by 19 publications

References 22 publications

Oxidation of Some Methoxy Anilines by Tetrabutylammoniumbromochromate in Aqueous Acetic Acid Medium: A Kinetics Study

Oxidation of Some Methoxy Anilines by Tetrabutylammoniumbromochromate in Aqueous Acetic Acid Medium: A Kinetics Study

Characterization of Reaction Intermediate Aggregates in Aniline Oxidative Polymerization at Low Proton Concentration

Adsorption and Oxidation of Aromatic Amines on Metal(II) Hexacyanocobaltate(III) Complexes: Implication for Oligomerization of Exotic Aromatic Compounds

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