I agree with the others: You probably won't be able to make the connection.

I flew into CDG just a week ago at about 10:30 a.m. and I got to my apartment (not far from Montparnasse) at about 1 p.m. and that was on a Sunday when there's little traffic. The hold-up was at the airport, waiting for luggage and passport control (a very long line).

Bons voyages!

Evan in Paris