Palladium(II) complexes with 1,2-bis(diphenylphosphino)acetylene (dppa) ligands often show a linear orientation of the diphosphine bridges. This linear arrangement is due to the presence of dπ-dπ back bonding between the palladium(II) center and the phosphorus atoms of the dppa ligands. In this type of complex, the metal center donates its dπ electrons into the π* antibonding orbitals of the phosphorus atoms, which results in a strong metal-ligand interaction. This interaction stabilizes the linear orientation of the dppa ligands.
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cis-1-trichloromethyl-2-bromocyclohexane
bis[4-phenyl-1-(furan-2-carbaldehyde) thiosemicarbazonato]palladium(II)
4-NITROPHENYL OCTYL ETHER
[(2,6-(Ph2PO)C6H3(CHNPh))PdCl]
