Can you place units in an Industrial Complex the turn you place it?
No, you cannot use industrial complexes you captured or purchased this turn. You must have missed it, top of page 22.

Phase 5: Mobilize New Units
Move the newly purchased units from the mobilization zone on the game board to eligible spaces you have controlled since the start of your turn, with the following exceptions (below). You cannot use industrial complexes that you captured or purchased this turn.