Question

In: Chemistry

An energy-dihedral angle diagram is provided for molecule Butane C4H10. Choose the right corresponding newman projection...


An energy-dihedral angle diagram is provided for m

An energy-dihedral angle diagram is provided for molecule Butane C4H10. Choose the right corresponding newman projection for the circled energy state.  What is the newman projection for 1?  2 What is the newman projection for 2?  What is the newman projection for 3?  What is the newman projection for 4?

Solutions

Expert Solution

The first question is right, because you are beggining in the most stable conformer and you are actually changing the proportion and view while you are advancing at the reaction. This is for angles, so, in every change of energy, you turn the angle to the left. That's why that order is well.

Now for the second question, the correct option would be B as you put in there, because, if you try to put this molecule as chair conformation, you got the following:

And if you try to reflect that into the newman projection, the closest and similar to that one would be option B, in this position, they are both in cis position and pointing in the same direction (upward).


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