norborn-2-ene; Pd0(tris(tert-butyl)phosphine)2 in benzene-d6 byproducts: CHCH2CHCH(CH2)C2H4, C2H4CH2O; mixt. of Sn compd., norbornene (9 equiv.) and Pd catalyst in benzene-d6 was reacted for 15 d; not isolated; NMR monitoring;