Self-Assembly of an Alkali Metal Cluster Stabilized by a New Flexidentate Metalloligand: Formation and Structure of Heterobimetallic Na–Mo and Cs–Mo 2D Networks
✍ Scribed by Snehadrinarayan Khatua; Sohaham Dasgupta; Kumar Biradha; Manish Bhattacharjee
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 209 KB
- Volume
- 2005
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
Abstract
A new tridentate ligand, {(3,5‐di‐tert‐butyl‐2‐hydroxybenzyl)amino}acetic acid, has been synthesized. This ligand forms [{Na~4~(H~2~O)~4~(μ‐H~2~O)~2~}(Mo~2~O~5~L~2~)~2~] (1), which contains an Na~4~^4+^ cluster cation stabilized by [LMoO~2~(μ‐O)MoO~2~L]^2–^, upon reaction with Na~2~MoO~4~ in aqueous methanol. This compound has been characterized by various spectroscopic techniques and crystallizes in the triclinic space group P$\bar {1}$. Furthermore, compound 1 undergoes smooth exchange of Na^+^ for Cs^+^ to give [Cs~2~(Mo~2~O~5~L~2~)·H~2~O]~n~ (2) upon treatment with CsCl in aqueous methanol. Similarly, 2 reacts with an excess of NaCl to produce 1. Complex 2 crystallizes in the monoclinic space group __C__2/c. The crystal structure of this compound reveals that the geometry of the [LMoO~2~(μ‐O)MoO~2~L]^2–^ unit stays almost intact but that it stabilizes a polymeric chain of Cs^+^ cations, unlike in 1. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)