The coordination chemistry of the fluorovinyl substituted phosphines PPh 2( Z-CF CFH) and PPh 2( E-CCl CFH) with K 2MX 4 (M = Pd, Pt; X = Cl, Br, and I) salts has been investigated resulting in the first reported palladium(II) and platinum(II) complexes of phosphines containing partially fluorinated vinyl groups. The complexes have been characterised by a combination of multinuclear [ 1H, 13C{ 1H}, 19F, 31P{ 1H}] NMR spectroscopy, and IR/Raman spectroscopy. The single-crystal X-ray structures of trans-[PdX 2{PPh 2(CF CFH)} 2], X = Cl ( 1), Br ( 2), I ( 3), trans-[PdCl 2{PPh 2(CCl CFH)} 2] ( 4), cis-[PtX 2{PPh 2(CF CFH)} 2], X = Cl ( 5), Br ( 6), trans-[PtI 2{PPh 2(CF CFH)} 2] ( 7), and both cis- and trans-[PtCl 2{PPh 2(CCl CFH)} 2] ( 8), have been determined. Results obtained from spectroscopic and crystallographic data suggest that replacement of a β-fluorine by hydrogen, whilst reducing the steric demand of the ligand, has little effect on the electronic character of the ligand. The presence of a proton in the vinyl group results in short proton–halide secondary interactions in the solid state ( d(H⋯X) = 2.72(3) for 1, and 2.92(5) Å for 2) forming an infinite chain ribbon motif.