Ligand behaviour of P-functionally substituted organotin halides: palladium(II) and platinum(II) complexes with Ph2PCH2CH2SnCl3

The P-functional organotin chloride Ph2PCH2CH2SnCl3 reacts with [(COD)MCl2] and trans-[(Et2S)2MCl2] (M=Pd, Pt) in molar ratio 1:1 to the zwitterionic complexes [(COD)M+(Cl)(PPh2CH2CH2Sn−Cl4)] (1: M=Pd; 2: M=Pt) and trans-[(Et2S)2M+(Cl)(PPh2CH2CH2Sn−Cl4)] (3: M=Pd; 4: M=Pt). The same reaction with [(COD)Pd(Cl)Me] yields under transfer of the methyl group from palladium to tin the complex [(COD)M+(Cl)(PPh2CH2CH2Sn−MeCl3)] (5) which changes in acetone into the dimeric adduct [Cl2Pd(PPh2CH2CH2SnMeCl2·2Me2CO)]2 (6). In molar ratio 2:1 Ph2PCH2CH2SnCl3 reacts with [(COD)MCl2] to the complexes [Cl2Pd(PPh2CH2CH2SnCl3)2] (7: M=Pd, mixture of cis/trans isomer; 8: M=Pt, cis isomer). In a subsequent reaction 8 is transformed in acetone into the 16-membered heterocyclic complex cis-[Cl2Pt(PPh2CH2CH2)2SnCl2]2 (9). trans-[(Et2S)2PtCl2] and Ph2PCH2CH2SnCl3 in molar ratio 1:2 yields the zwitterionic complex [(Et2S)M+(Cl)(PPh2CH2CH2SnCl3)(PPh2CH2CH2Sn−Cl4)] (10). The results of crystal structure analyses of 1, 3, 6, 9 and of the adduct of the trans-isomer of 7 with acetone (7a) are reported. 31P- and 119Sn-NMR data of the complexes are discussed.