Problem: The compound 2,6-dimethylpyrazine (below) gives chocolate its odor and is used in flavorings. In what type of hybrid orbital do the lone pairs of N reside?

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Recall: Sigma σ bonds are formed from the end-to-end overlap of s-p hybrid orbitals. On the other hand, pi π bonds are formed from the side-to-side overlap of unhybridized p orbitals.

From the Lewis structure, we can see that each nitrogen atom in 2,6-dimethylpyrazine forms two σ bonds, one π bond, and holds a single lone pair.

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The compound 2,6-dimethylpyrazine (below) gives chocolate its odor and is used in flavorings. In what type of hybrid orbital do the lone pairs of N reside?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Orbital Overlap concept. If you need more Orbital Overlap practice, you can also practice Orbital Overlap practice problems.

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Based on our data, we think this problem is relevant for Professor Achari's class at BU.

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Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.