The Newman projection that represents the least stable conformation of 3,3-dimethylhexane viewed along the C3-C4 bond are in the given figure
The three-dimensional structure of molecules is better understood with the use of a diagram called a Newman projection. This projection often focuses on a carbon-carbon bond, which makes it very useful for understanding the stereochemistry of alkanes. A circle representing the rear atom and a dot representing the front atom in a Newman projection represent the conformation of a chemical bond from front to back, respectively. The front atom is referred to as proximal, whereas the back atom is referred to as distal. This type of illustration demonstrates the exact dihedral angle between the proximal and distal atoms. In order to partially replace Fischer projections, which are unable to adequately describe conformations and, consequently, conformers, American chemist Melvin Spencer Newman created this projection in 1952. He gave his name to the projection. Natta projections and sawhorse projections, which both show carbon-carbon bonds from an oblique angle, are alternatives to this diagram design.
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