How do you know, when looking at a Newman projection, if it is staggered or eclipsed? (Eclipsed conformations have three dihedrals of 0o, staggered conformations have none. - GS).

How do you prove that the Beckmann’s rearrangement pathway where the leaving group and alkyl migration occur simultaneously is prefered over a pathway with a nitrenium ion intermediate? (For the simultaneous pathway, the group in the anti-position with respect to the oxime hydroxyl will migrate. If the nitrenium ion forms, both group will have a good chance to migrate. - GS).