If pyridine and pyrimidine are both aromatic compounds, how many elctrons does each nirtogen atom contribute to the electron cloud of each compound?
In each compound, each
Pyridine
The structure of pyridine is
That leaves 1 valence electron available to participate in the aromatic π cloud.
Pyrimidine
The structure of pyridine is
The two
Each
That leaves 1 valence electron available in each
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Each nitrogen atom in pyridine contributes one electron to the electron cloud, while each nitrogen atom in pyrimidine contributes two electrons to the electron cloud.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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