87191-68-2Relevant academic research and scientific papers
Trans chelation in transition-metal complexes: Synthesis and characterization of palladium(II) complexes of bis(diphenylarsino)alkanes
Hill,Minahan,McAuliffe
, p. 3382 - 3387 (2008/10/08)
A number of synthetic routes to the bis(tertiary arsines) Ph2As(CH2)nAsPh2 (n = 6-12, 16) are described. These ligands form square-planar Pd(ligand)X2 (X = Cl, Br, I, CNS; n = 6, 8, 10, 12, 16) and Pd(ligand)Cl2 (n = 7, 9, 11) complexes, which have been characterized by elemental analyses, infrared and proton NMR spectroscopy, solid-state reflectance and solution visible/UV spectroscopy, and vapor-phase osmometry. Spectroscopic data indicate that the trans isomer is the only product when n > 9 and is the predominant one for n a function of the chelate chain length: polymeric species being preferred for short-chain ligands but monomeric units for the longer chain analogues (n = 12, 16). Evidence is given for the presence of both Pd-NCS and Pd-SCN linkages in the solid state and in solution for the thiocyanate derivatives. Factors affecting the formation of these trans-chelated complexes are discussed.
