Answer to Question #2933 in Organic Chemistry for lalith

Question

Is there any rule that atom placed at the axial position of the cyclohexane in chair form will refer to the front (thick line) with reference to planar form and atom placed at equitorial refer to back (dotted line) or vice versa. Please help me out....

Answer 1

All the axial bonds are parallel to the plane of the drawing, so they cannot be shown as either dotted or bold line. However all the equatorial positions are usually shown using bold or dotted lines. The rule is the direction of each bond in space: if it is directed forward, then it will be shown as bold line. Vice versa if it is directed backward, then it will be shown as dotted line.