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| Titel: |
Syntheses, crystal structures and magnetic properties of two new ionic pair complexes with well-separated columnar stack structures based on [image omitted] |
| Auteur: |
Ni, Chunlin Zheng, Yiping Le, XueYi |
| Verschenen in: |
Journal of coordination chemistry |
| Paginering: | Jaargang 59 (2006) nr. 10 pagina's 1173-1182 |
| Jaar: |
2006-07-10 |
| Inhoud: |
The crystal structures of two new ion-pair complexes, [DiClBzPy][Ni(mnt)2] (1), and [DiClBzQl][Ni(mnt)2] (2), ([DiClBzPy]+ = 1-(2',4'-dichlorobenzyl)-pyridinium, [DiClBzQl]+ = 1-(2',4'-dichlorobenzyl)-quinolinium, and mnt2- = maleonitriledithiolate) were determined. The [image omitted] anions and cations of 1 and 2 stack into well-segregated columns in the solid state; the Ni(III) ions form a 1D zigzag chain within a [image omitted] column through Ni ··· S, S ··· S, Ni ··· Ni or π ··· π interactions. For 2, the anion-anion, anion-cation and cation-cation contacts play important roles in packing and stabilization. The variable temperature magnetic susceptibilities of 1 and 2 in the 75-298 K range have been interpreted in terms of simple dimer approximation (H = 2JSASB). The results reveal that both complexes exhibit strong antiferromagnetic interactions with the fitting value g = 2.12 and J = -298.2 cm-1 for 1, g = 2.17 and J = -218.4 cm-1 for 2. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 41 van 86 gevonden artikelen
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