Draw the condensed structural or line-angle formula for the alkene produced by each of the following dehydration reactions:
b.

Question

Draw the condensed structural or line-angle formula for the alkene produced by each of the following dehydration reactions:

b.

Accepted Answer

All right. Hi, everyone. So this question says to sketch the condensed structural formula of the product of the reaction shown below where 44 dimethyl pentane 10 reacts with acid in the presence of heat. Now, in this case, notice how we are actually given a line structure of our starting material in which carbon atoms are not explicitly shown and rather depicted as corners or open ends. So before getting into the condensed structural formula, I want to go ahead and start by drawing out the line structure of the product. In this case, we have an alcohol as our starting material reacting with acid in the presence of heat. Recall that this reaction is known as the dehydration of an alcohol. Now, when we say dehydration, we're stating that a water molecule is removed from the alcohol starting material. So this means that the alcohol carbon, in this case, carbon one loses the hydroxy group, whereas the neighboring carbon, carbon two loses a hydrogen atom, this results in the formation of an alkene as our final product. So when drawing out the line structure of the product, the carbon backbone is not going to change, right. So I will still have a five carbon chain with two metal substituents. The main difference is that now I'm going to have a double bond in between carbons one and two. And in this case, this would be our only product because carbon one only has one neighboring carbon, meaning that one double bond can form in between them. So using the line structure of our product, we can come up with the condensed structural formula. Recall that in a condensed structural formula bonds to hydrogen are not explicitly shown. So for example, carbon carbon bonds will be depicted, but hydrogen atoms are simply grouped with the carbon atoms, they are connecting to. You will see this as ch three ch two and so on. So to understand how many hydrogens each carbon is going to require, recall that carbon prefers to have four bonds to be neutral. So in the line structure, hydrogen is implied to be present specifically as many hydrogens required to fulfill carbon for bond requirement. So for example, right, if one carbon atom is shown to have one bond to another atom, then three hydrogens are implied to be present. If one carbon atom has two bonds to other atoms, then two hydrogens are implied. And if there are three bonds, then one hydrogen is implied. So the first thing I will do is draw out the five carbons in my parent chain. And just for the record, 90 degree angles are used in between the bonds in a conventional condense structural formula. So that's why I'm drawing my car here going along a straight line. And so my methyl substituents will be above and below carbon four and there you have it. So our final product here is 44 dimethyl pt one in. And so with that being said, thank you so very much for watching and I hope you found this helpful.

Draw the condensed structural or line-angle formula for the alkene produced by each of the following dehydration reactions:
b.

Verified video answer for a similar problem:

Key Concepts

Dehydration Reaction

Alkene Structure

Condensed Structural Formula

Draw the condensed structural or line-angle formula for the alkene produced by each of the following dehydration reactions:b.

Verified video answer for a similar problem:

Key Concepts

Dehydration Reaction

Alkene Structure

Condensed Structural Formula

Draw the condensed structural or line-angle formula for the alkene produced by each of the following dehydration reactions:
b.