We are being asked to identify the resonance forms that describe the distribution of electrons in pyridine, C5H5N
First, we will have to draw the Lewis Structure of pyridine.
Step 1: Determine the central atom in this molecule.
•H is less electronegative than C or N but H can only make one bond
•C would also bond with either N or H forming a total of 4 bonds each C atom
• N would also bond with either C or H to form up to 4 bonds
•C and N would each be central atoms
Step 2: Calculate the total number of valence electrons present.
Group Valence Electrons
C 4A 4 valence e- x 5
N 5A 5 valence e-
H 1A 1 valence e- x 5
Total = 30 valence e-
Step 3: Draw the Lewis Structure for the molecule
Write resonance forms that describe the distribution of electrons in each of these molecules or ions.
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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 Resonance Structures concept. You can view video lessons to learn Resonance Structures. Or if you need more Resonance Structures practice, you can also practice Resonance Structures practice problems.