Problem: The thiocyanate ion, NCS-, is linear, with a central carbon atom. Construct all feasible electron-dot diagrams for this ion; then use the concept of formal charge to identify the most probable contributing structures. Display the result using a partial bond representation.

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We are being asked to construct all feasible electron-dot diagrams for the thiocyanate ion, SCN- and then use the concept of formal charge to identify the most probable contributing structures. 


We are also asked to present the result using a partial bond representation.

First, we will determine the Lewis structure of the given compound using the steps below:

Step 1. Calculate the total number of valence electrons.

Step 2. Determine the central atom in the molecule.

Step 3. Draw the Lewis structure for the molecule and employ the concept of formal charge:



Second, is to present the results using partial bond representation.


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Problem Details

The thiocyanate ion, NCS-, is linear, with a central carbon atom. Construct all feasible electron-dot diagrams for this ion; then use the concept of formal charge to identify the most probable contributing structures. Display the result using a partial bond representation.

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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.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Gedik's class at University of Alberta.