摘要
Three ion-pair complexes, [4-NH2-Py]2[M(mnt)2] (4-NH2-Py1+ = 4-amino-pyridinium; mnt2- = maleonitriledithiolate; M = Pt (1), Pd (2) or Ni (3)), have been synthesized and characterized. In the crystal of 1, the strong H-bonding interaction was found from the protonated N-atom of pyridinium to the CN group of [Pt(mnt)2]2- together with a weak Pt...H interaction between the anion and the cation. The crystals of 2 and 3 are isostructural with very similar lattice parameters and packing structures, which are distinct from the crystal of 1. Two kinds of strong H-bonding interactions are observed in the crystals of 2 and 3 between the CN groups of [M(mnt)2]2- anion and the protonated N-atom of 4-NH2-Py1+ cation as well as the CN groups of [M(mnt)2]2- anion and the amino group of 4-NH2-Py1+ cation. Complex 1 shows an intense near-IR absorbance in acetonitrile and solid state, such an absorption band is probably assigned to IPCT transition as well as a trace amount of [Pt(mnt)2]1- species; complex 3 possesses a weak near-IR absorption band which can be attributed to the mixture of d-d transition in [Ni(mnt)2]2- and IPCT transition as well as a trace amount of [Ni(mnt)2]1- species.
| 源语言 | 英语 |
|---|---|
| 页（从-至） | 191-197 |
| 页数 | 7 |
| 期刊 | Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy |
| 卷 | 75 |
| 期 | 1 |
| DOI | |
| 出版状态 | 已出版 - 1月 2010 |