Catalyst-substrate adducts in asymmetric catalytic hydrogenation. Crystal and molecular structure of (((R,R)-1,2-bis(phenyl-o-anisoylphosphino)ethane)(methyl (Z)-. beta. -propyl-. alpha. -acetamidoacrylate))rhodium tetrafluoroborate, (Rh(DIPAMP)(MPAA))BF sub 4