Nitrogen 2 is most basic because the lone pair of nitrogen is localised and show most basic nature.
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What is basic nitrogen compound?
Basic nitrogen compounds, which can inhibit the acidic sites of the catalysts, are mainly pyridine derivatives (6-membered-ring nitrogen compounds), and despite the use of highly resolutive methods, their characterization, especially in VGO, is still limited.
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Which nitrogen on nicotine is most basic?
With two nitrogen’s, one on each ring, nicotine exhibits two pKa’s. The nitrogen of the pyrrolidine ring is more basic (pka = 8.10 at 25°C) than that of the pyridine ring (pka = 3.41 at 25°C) [24].
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Which nitrogen is most basic in histidine?
The difference can be seen by looking at the pKa’s of the conjugate acids in each case. The higher the pKa of the conjugate acid, the more tightly the proton is held, and so the more basic the nitrogen atom. Arginine is by far the most basic and histidine is the least basic. Figure AB15.
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Which of the following nitrogen is the most basic?
Nitrogen 2 is most basic because the lone pair of nitrogen is localised and show most basic nature.
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What makes a nitrogen most basic?
The nitrogen atom is strongly basic when it is in an amine, but not significantly basic when it is part of an amide group. While the electron lone pair of an amine nitrogen is localized in one place, the lone pair on an amide nitrogen is delocalized by resonance.
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Which nitrogen is most basic in histamine?
So overall, nitrogen (I) is the most basic nitrogen atom in histamine.
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Which nitrogen atoms are basic?
The lone pair electron on nitrogen-1 is localized and it is s p 3 hybridized. So, nitrogen-1 is the most basic.
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What is basic nitrogen compounds?
Basic nitrogen compounds, which can inhibit the acidic sites of the catalysts, are mainly pyridine derivatives (6-membered-ring nitrogen compounds), and despite the use of highly resolutive methods, their characterization, especially in VGO, is still limited.
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Which is the most basic nitrogen compound?
Nitrogen 2 is most basic because the lone pair of nitrogen is localised and show most basic nature.
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What is the difference between basic nitrogen and total nitrogen?
Total nitrogen is the sum of basic and nonbasic nitrogen. Basic nitrogen is about one-fourth to one-half of total nitrogen. The word “basic” denotes molecules that react with acids. Basic nitrogen compounds will neutralize acid sites on the catalyst.
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What is a basic nitrogen atom?
Here the most basic nitrogen atom is (c)−NH. This is because here nitrogen is attached to the aliphatic carbon atom. The nitrogen in (b)−NH2 is in conjugation with aromatic ring thus it does not have enough electron to act as a Lewis base.
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Which nitrogens are more basic?
double bonded nitrogen is more basic, because the other one has delocalized lone pair – your second point…
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Which nitrogen of histidine is first protonated?
Protonation at β−N leads to imidazolium ion, which is stabilized by two equivalent resonating structures.
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What is the basic strength of nitrogen in histamine?
The percentage of nitrogen by mass in Histamine =42111×100=37.84%
