New Mixed-Metal Aggregates Derived From Dinickel Complexes on a 2-Formylphenolate Template: Counteranion Dependent Formation of 1D Chain and Discrete NaNi2 Complexes
✍ Scribed by Alok Ranjan Paital; Masahiro Mikuriya; Debashis Ray
- Book ID
- 102826018
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 782 KB
- Volume
- 2007
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
Abstract
The combination of 2‐formylphenol (Hfp) and the dinucleating ligand H~3~L {2‐(2′‐hydroxyphenyl)‐1,3‐bis[4‐(2‐hydroxyphenyl)‐3‐azabut‐3‐enyl]‐1,3‐imidazolidine} with Ni(NO~3~)~2~·6H~2~O leads to the self‐assembly of a Ni~2~ complex capable of showing anion dependent Na^+^ coordination. The terminal aqua coordinated [Ni~2~(fp)L(H~2~O)]·3H~2~O (1·3H~2~O) neutral fragment, formed in the absence of any Na^+^ source, produces a 1D chain complex [{Ni~2~(fp)L(N~3~)(Na)(H~2~O)}·5H~2~O]~n~ (2·5H~2~O)~n~ and a discrete NaNi~2~ complex [Ni~2~(fp)L(Na)(H~2~O)~2~]·ClO~4~·H~2~O (3·ClO~4~·H~2~O) through its weak oxophilic interaction with a Na^+^ cation of the coordinated trisphenolate unit of L^3–^ as observed in metallacrowns. In complexes 2 and 3, the Ni^II^ ions are coupled ferromagnetically to yield S = 2 ground states. The magnetic data can be modeled by using the Van Vleck equation incorporating intermolecular interactions. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)