Just wondering the limitations of shifting wheels from models of car: age and brake disk size etc.

The wheels are off a vectra B and are 5 stud. I tried to buy some steelies with snow tyres on them for my astra H last year which were off a vectra B but I found out that they wouldn't fit due to a change in the brake callipers, or something, the details get a little hazy now. I think they would fit on the rear but not the front?