Platinum / Nickel / Stannyl complexes / Oxidative addition / Tin Reaction of Ni(COD) 2 (COD = 1,5-cyclooctadiene) with two are more prone to oxidative addition than the Sn-Me groups. When Ni(COD) 2 is treated with one equivalent of equivalents of Ph 2 PCH 2 CH 2 SnPh 3 or of (Ph 3 P) 2 Pt(C 2 H 4 ) with two equivalents of Ph 2 PCH 2 CH 2 SnR 3 (R = Ph, Me, Bu) results Ph 2 PCH 2 CH 2 SnPh 3 and PR' 3 (PCy 3 or PMe 2 Ph) each, the complexes (R' 3 P)M(PPh 2 CH 2 CH 2 SnPh 2 )(Ph)(M-Sn) are in the immediate formation of the complexes (R 3 SnCH 2 CH 2 Ph 2 P)MPPh 2 CH 2 CH 2 SnPh 2 (M-Sn) (M = formed. Heating of (Ph 3 SnCH 2 CH 2 Ph 2 P)NiPPh 2 -CH 2 CH 2 SnPh 2 (Ni-Sn) to 70 Β°C induces the oxidative Ni, Pt) with a cis arrangement of the two phosphorus atoms. The structure of (Me 3 SnCH 2 CH 2 Ph 2 P)PtPPh 2 CH 2 -addition of a Sn-Ph group of the dangling ligand, and cis-Ni[PPh 2 CH 2 CH 2 SnPh 2 (Ni-Sn)] 2 is obtained. The same CH 2 SnMe 2 (Pt-Sn) was confirmed by an X-ray structure analysis. In the presence of PPh 3 , this complex shows complex is formed upon reaction of Ni(COD) 2 with Ph 2 PCH 2 CH 2 SnPh 2 H. Reaction of Ni(COD) 2 with dynamic behavior in solution due to Ph 2 PCH 2 CH 2 SnMe 3 / PPh 3 exchange. When the phosphanylalkylstannanes Ph 2 PCH 2 CH 2 SnMe 3 results in the immediate formation of trans-Ni[(PPh 2 CH 2 CH 2 SnMe 2 (Ni-Sn)] 2 . Ph 2 PCH 2 CH 2 SnPh 3-x Me x (x = 1, 2) are employed in the reaction with Ni(COD) 2 or (Ph 3 P) 2 Pt(C 2 H 4 ), the Sn-Ph groups