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Condensation of Z-PPh, CH, C (Bu')= NNH, with salicylaldehyde or 4.6-dimethoxysalicylaldehyde gave the azine phosphines Z, E-PPh, CH, C (Bu')= NN= CH (C, H, OH-2) 1 a or Z, E-PPh, CH, C (Bu')= NN= CH [C, H,(OH-2)(OMe),-4.61 1 b, respectively. Treatment of la with [PdCl,(cod)](cod= cycloocta-I 5-diene) gave the bidentate chelate complex [PdCI,{PPh, CH, C ( But)= NN= CH (C, H, OH-2)}] 3. The phosphine la reacts with Na, PdCI, in the presence of Na0, CMe to give the terdentate chelate complex [PdCI {PPh, CH, C (Bu')= NN= CH (C, H, O)}] 4a. Treatment of the latter with Nal or Mg Me1 gave the corresponding iodopalladium (1l) complex 4b or the methylpalladium (ii) complex 4c. respectively. The analogous methylplatinum (1i) complex [PtMe {PPh, CH, C (Bu')= NN= CH (C, H, O)}] 4d was prepared by treating [PtMe,(cod)] with la. Fluxional nickel (1i) complexes of type [NiX {PPh2CH, C (But)= NN= CH (C6H40))](X= CI 4e or Br 4f) were also prepared from NiX,* nH, O. When Ni (O, CMe),~ 4H, O was treated with two mol equivalents of la a paramagnetic octahedral nickel (ii) complex [Ni {PPh, CH, C (Bu')= NN= CH(C, H, O)},] 5 was formed. Treatment of [PtCl,(cod)] with two mol equivalents of la in the presence of Na0, CMe gave a monocationic platinum (ii) chloride salt, which with NH, PF, gave the PF, salt. Treatment of 1 b with [IrCI (CO),(MeC, H, NH,-p)] or 0.5 equivalents of [Rh, CI,(CO),] in the presence of NEt, gave the square-planar complexes [M (C~){PP~, CH, C (BU~)= NN= CH [C, H, O (OM~)~-~,~]}](M= Ir 7a or Rh 7b). The carbonyliridium (I) complex 7a underwent oxidative-addition reactions with Mel, ally1 chloride, acetyl chloride or …