This deal makes no sense for the C's IMO. You trade Rondo if you can get an upgrade, or if you can get multiple building blocks with more superstar potential. This would be a sideways move at best, but will cost you more money. And Chandler in particular might be one of the most overrated players in the league right now.
He is a great defensive player when he is at his best, but he has done that for many 2 years out of his career. And when he is not dominating defensively, he is a liability because of his lack of offense.