名称:
Indium(III) complexes with tridentate nitrogen donor ligands. Synthesis, characterization and crystal structure of complexes with pyridine-2,6-bis(acetyloxime) and 2,6-bis(1-phenyliminoethyl)pyridine
摘要:
2,6-Bis (acetyloxime)pyridine, 2,6-C5H3N(C2H3NOH)(2) (L-1), reacts with indium(III) chloride in methanol to give the seven-coordinate complex [InCl3(L-1)(MeOH)]. The structurally similar Schiff base ligand 2,6-bis(1-phenyliminoethyl)pyridine (L-2), 2,6-C5H3N(C2H3NC6H5)(2), however, forms a six-coordinate indium(III) complex of the composition [InCl3(L-2)]. The In-N bond distances are longer by 0.03-0.12 Angstrom in the seven-coordinate compound compared with those in the Schiff base complex. The MeOH ligand in [InCl3(L-1)(MeOH)] can be replaced by Cl- or H2O to give the complex anion [InCl4(L-1)](-) and [InCl3(L-1)(OH2)], respectively. The pentagonal-bipyramidal coordination environment of the metal is preserved during these reactions. (C) 1997 Elsevier Science Ltd.