摘要
The crystal structures and magnetic properties were investigated experimentally and theoretically for two S = spin chain complexes, which consist of [M(mnt) 2] - (M = Pt for 1 or Pd for 2) with 1-(4′-bromo-2′-flurobenzyl)-4-aminopyridinium (1-BrFBz-4-NH 2Py +). The 1-BrFBz-4-NH 2Py + cations exhibit different molecular conformations and arrangements in 1 and 2; the [M(mnt) 2] - anions form regular stacks in 1, whereas they form irregular stacks in 2. In addition, the intermolecular interactions between the [M(mnt) 2] - anions and cations are also different from each other in the crystals of 1 and 2. Complex 1 shows the magnetic characteristics of a low-dimensional antiferromagnetic coupling spin system with a spin-Peierls-type transition around 7 K, and complex 2 exhibits diamagnetism over the temperature range of 5-300 K. Theoretical analyses, based on the calculations for the charge density distributions of [Pt(mnt) 2] - and [Pd(mnt) 2] - anions and the magnetic exchange constants within the anion spin chains, addressed the diverse molecular alignments in the crystals of 1 and 2 and distinct magnetic behaviors between 1 and 2.
| 源语言 | 英语 |
|---|---|
| 页（从-至） | 2667-2676 |
| 页数 | 10 |
| 期刊 | Dalton Transactions |
| 卷 | 41 |
| 期 | 9 |
| DOI | |
| 出版状态 | 已出版 - 7 3月 2012 |