TRANSITION METAL-CARBON BONDS. LV. CYCLOMETALLATION AND OTHER REACTIONS OF PBut2Bui AND PPh2Bui WITH PLATINUM(II) AND PALLADIUM(II)

Article abstract of DOI:10.1016/0022-328X(83)85081-5

The new phosphine, PBu^t2Buⁱ (L), was prepared from Bu^t2PCl and LiBuⁱ.PPh2Buⁱ (L') was prepared from PH2PCl and LiBuⁱ.Treatment of t)2> with L' gives which does not cyclometallate even on prolonged boiling in 2-methoxyethanol.In contrast, t)2> reacts with PBu^t2Buⁱ in boiling 2-methoxyethanol to give the cyclometallated complex (II, X = Cl).The corresponding bromide, iodide and acetylacetonate were prepared.With PPh3 II (X = Cl) gives which with NaBH4 gives .Na2PdCl4 with L (2 mol equivalents) gave trans-, which was converted into trans- by metathesis with KSCN.Treatment of Na2PdCl4 with L (1 mol equivalent) gave , which on heating in 2-methoxyethanol gave , as a mixture of syn- and anti-isomers.The complexes trans- and were also prepared. 1H- and 31P NMR data are given.