Alkylpyridines and Arylpyridines

Tenenbaum, Leon E.

doi:10.1002/9780470186657.ch3

Cited by 3 publications

(1 citation statement)

References 493 publications

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“…Of the three isomers, 3-methylpyridine is the least reactive [18], but under pyrolysis conditions the decomposition reactivity is reversed, with 3-methylpyridine being the most reactive for decomposition at around 800 °C [19]. From Table 3, the relative NPD responses were in the order: 3-methylpyridine (1) > 4-methylpyridine (0.95) > 2-methylpyridine (0.69).…”

Section: Impact Of Molecular Structure Of Isomers On Cyano-radical Fomentioning

confidence: 98%

Nitrogen-containing aromatic compounds: quantitative analysis using gas chromatography with nitrogen phosphorus detector

Rao

Klerk

2021

Appl Petrochem Res

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The nitrogen-containing aromatic compounds found in the petrochemical industry are varied and extend beyond classes such as the anilines, pyrroles and pyridines. Quantification of these nitrogen-containing compounds that may occur in complex mixtures has practical application for quality assurance, process development and the evaluation of conversion processes. Selective detection of nitrogen-containing species in complex mixtures is possible by making use of gas chromatography coupled with a nitrogen phosphorous detector (GC-NPD), which is also called a thermionic detector. Despite the linearity of the NPD response to individual nitrogen-containing compounds, the response factor is different for different compounds and even isomers of the same species. Quantitative analysis using an NPD requires species-specific calibration. The reason for the sensitivity of the NPD to structure is related to the ease of forming the cyano-radical that is ionized to the cyanide anion, which is detected. The operation of the NPD was related to the processes of pyrolysis and subsequent ionization. It was possible to offer plausible explanations for differences in response factors for isomers based on pyrolysis chemistry. Due to this relationship, the NPD response can in the same way be used to provide information of practical relevance beyond its analytical value and a few possible applications were outlined.

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Section: Impact Of Molecular Structure Of Isomers On Cyano-radical Fomentioning

confidence: 98%

Nitrogen-containing aromatic compounds: quantitative analysis using gas chromatography with nitrogen phosphorus detector

Rao

Klerk

2021

Appl Petrochem Res

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Effect of collidine (2,4,6-trimethylpyridine) on the osmiophilia and chromaffin reaction in the synaptic vesicles of rat pineal nerves

Tomsig

Iraldi

1987

Histochemistry

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Rat pineal nerve endings contain a population of small and of large synaptic vesicles that are either electron lucent or have electron-dense cores. It has been reported that their osmiophilia is eliminated when collidine buffer is used in the fixation procedure. We investigated this effect and found that osmium tetroxide and potassium dichromate reactivity were abolished when excised pineal glands were briefly incubated with collidine buffer before glutaraldehyde-cacodylate fixation. Such an effect was not observed when collidine was applied after fixation. Glands that had been fixed in glutaraldehyde or osmium tetroxide buffered with collidine exhibited a peripheral zone containing reactive synaptic vesicles and a deeper, central zone where such reactivity was absent. These results indicate that the effect of collidine is due to depletion of monoamines rather than to chemical blockage of their reactivity, and further suggest that collidine has a higher rate of penetration into tissues than the tested fixatives.

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Aromatic Linear Polysulfones with Pendant Functional Groups

Avram¹,

Filimon²

2015

Functionalized Polysulfones

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Alkylpyridines and Arylpyridines

Cited by 3 publications

References 493 publications

Nitrogen-containing aromatic compounds: quantitative analysis using gas chromatography with nitrogen phosphorus detector

Nitrogen-containing aromatic compounds: quantitative analysis using gas chromatography with nitrogen phosphorus detector

Effect of collidine (2,4,6-trimethylpyridine) on the osmiophilia and chromaffin reaction in the synaptic vesicles of rat pineal nerves

Aromatic Linear Polysulfones with Pendant Functional Groups

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