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In: Chemistry

Using Newman Projection, draw the eclipsed and gauche conformation of the following compounds. 1. propane (C1-C2)...

Using Newman Projection, draw the eclipsed and gauche conformation of the following compounds.

1. propane (C1-C2) CH3CH2CH3

2. butane (C2-C3) CH3CH2CH2CH3

Why are both of the conformational isomers with a 0o and 120o dihedral angles considered to be in an eclipsed conformation?

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