Some attempts to prepare chelating nitrophenylpalladium(II) complexes. Synthesis of covalent arylpalladium(II) perchlorate complexes. Crystal and molecular structure of catena-trans(tht)2(H2O)>ClO4>n (tht=tetrahydrothiophene)

Article abstract of DOI:10.1016/0022-328X(92)80180-6

Complexes react with AgClO4 to give the corresponding perchlorato-complexes .Of these only some could be isolated and characterized .These complexes, and solutions of the other non-isolated perchlorato-complexes, react with different neutral ligands to give cationic complexes ClO4 .The complex (PhCH2PPh3) (R = C6H2(NO2)3-2,4,6, dmso = dimethyl sulphoxide) reacts with Ag2(ox) (ox = oxalate) to give (PhCH2PPh3) (8) and (NMe4)2 (R = C6H3-Me2-NO2-6) reacts with Tl(acac) (acacH = acetylacetone) to give (9).IR studies suggest that in this complex the aryl ligand is chelating.The crystal structure of trans-(tht)2(H2O)ClO4 shows that each perchlorate anion bridges two cations using two different oxygen atoms which gives a catena structure with a helical frame.The anion-cation interaction seems to be through hydrogen bonding with the coordinated water molecule.C-C bond angles in the trinitrophenyl group support suggestions that nitro groups exert a - I inductive effect rather than a - M effect on the ring electron density.