An Inorganic Helix [Mn(IPG)(MeOH)]n[PF6]n[‡]: Structural and Magnetic Properties of a syn-anti Carboxylate-Bridged Manganese(II) Chain Involving a Tetradentate Ligand
✍ Scribed by Clotilde Policar; François Lambert; Michèle Cesario; Irène Morgenstern-Badarau
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 349 KB
- Volume
- 1999
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
Carboxylate syn-anti / N-centered tripodal ligand / Manganese / Imidazole / Helicoı ¨dal inorganic chiral chain / Magnetism / π-π interaction
The crystal structure of an infinite inorganic chain consisting along the b axis of the P2 1 space group. The magnetic properties have been investigated. They show a pseudo-2D of Mn II and an
magnetic structure, with one major pathway along the chain and an inter-chain minor one. The intrachain coupling is a presented. It exhibits a chiral helical structure with a pitch of two monomeric units (each monomeric unit containing one weak antiferromagnetic interaction (J/k = -0.25). This low value is entirely consistent with the geometry of the bridge. Mn atom). Each manganese is connected to its neighbor through a carboxylate bridge in a syn-anti geometry. Around
The interchain coupling is a weaker antiferromagnetic coupling (JЈ/k = -0.11) and could be mediated through π-π each manganese center, two carboxylates bind in a cis geometry. This peculiar bridging geometry (syn-anti cis) interactions between pyridine and imidazole from two adjacent helixes. provides a broken-line chain, running in a zig-zag manner the results of structural and magnetic susceptibility studies [ ] IPG