The stability constants of PdAB ternary complexes were determined by potentionmetric pH titration at 25℃,I=0.1mol/l KNO3,whereA=2,2′-bipyridy1-3,3′-dicarboxylicacid,B=Alanine,3,5-Dibr-tyrosine and 3,5-DiI-tyrosine....The stability constants of PdAB ternary complexes were determined by potentionmetric pH titration at 25℃,I=0.1mol/l KNO3,whereA=2,2′-bipyridy1-3,3′-dicarboxylicacid,B=Alanine,3,5-Dibr-tyrosine and 3,5-DiI-tyrosine.The binary complexes stability constants have also been determined at the same conditions.And compared with alanine,tyrosine system,the possible reasons that lead to extra stability of ternary complexes were discussed from the viewpoint of aromatic ring stacking,d-pπbond or hydrogen-bond.展开更多
A novel palladium(Ⅱ) complex [Pd(H2bpdc)Ala]Cl·3H2O (where H2bpdc is 2,2′-bipyridine-3,3′-dicar- boxylic acid and Ala is L-alanine) has been synthesized and characterized by IR spectra and elemental analysis. ...A novel palladium(Ⅱ) complex [Pd(H2bpdc)Ala]Cl·3H2O (where H2bpdc is 2,2′-bipyridine-3,3′-dicar- boxylic acid and Ala is L-alanine) has been synthesized and characterized by IR spectra and elemental analysis. The crystal structure of the complex has been determined by single-crystal X-ray diffraction analysis. It crystallizes in triclinic system, space group P1 with a=0.685 5(2) nm, b=0.988 4(4) nm, c=1.349 6(4) nm, α=98.375(8)°, β= 97.900(15)°, γ=90.118(15)°, V=0.895 9(5) nm3, Z=2. In the molecule, Pd(Ⅱ) atom is four-coordinated and located at the centre of a planar quadrangle. The complex is assembled via intramolecular π-π stacking interactions and hydrogen bonds, which forms 2D network. The cyclic voltammetric behavior of the complex was also investigated.展开更多
文摘The stability constants of PdAB ternary complexes were determined by potentionmetric pH titration at 25℃,I=0.1mol/l KNO3,whereA=2,2′-bipyridy1-3,3′-dicarboxylicacid,B=Alanine,3,5-Dibr-tyrosine and 3,5-DiI-tyrosine.The binary complexes stability constants have also been determined at the same conditions.And compared with alanine,tyrosine system,the possible reasons that lead to extra stability of ternary complexes were discussed from the viewpoint of aromatic ring stacking,d-pπbond or hydrogen-bond.
文摘A novel palladium(Ⅱ) complex [Pd(H2bpdc)Ala]Cl·3H2O (where H2bpdc is 2,2′-bipyridine-3,3′-dicar- boxylic acid and Ala is L-alanine) has been synthesized and characterized by IR spectra and elemental analysis. The crystal structure of the complex has been determined by single-crystal X-ray diffraction analysis. It crystallizes in triclinic system, space group P1 with a=0.685 5(2) nm, b=0.988 4(4) nm, c=1.349 6(4) nm, α=98.375(8)°, β= 97.900(15)°, γ=90.118(15)°, V=0.895 9(5) nm3, Z=2. In the molecule, Pd(Ⅱ) atom is four-coordinated and located at the centre of a planar quadrangle. The complex is assembled via intramolecular π-π stacking interactions and hydrogen bonds, which forms 2D network. The cyclic voltammetric behavior of the complex was also investigated.
