Mobin, Shaikh M. ; Srivastava, Ashwini K. ; Mathur, Pradeep ; Lahiri, Goutam K. (2009) Vapor-diffusion-mediated single crystal-to-single crystal transformation of a discrete dimeric copper(II) complex to a discrete tetrameric copper(II) complex Inorganic Chemistry, 48 (11). pp. 4652-4654. ISSN 0020-1669
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Official URL: http://pubs.acs.org/doi/abs/10.1021/ic900510v
Related URL: http://dx.doi.org/10.1021/ic900510v
Abstract
The symmetric dimeric complex [Cu(μ2-hep)(TFA)(H2O)]2 (1) has been synthesized from 2-(2-hydroxyethyl)pyridine (hep-H), trifluoroacetic acid (TFA-H), and copper acetate in a 95:5 (v/v) MeOH-H2O mixture at 298 K. Each CuII ion in 1 is linked with two μ2-alcoholic oxygen atoms and one pyridine nitrogen atom of hep, and the other two coordination sites are occupied by the oxygen donors of TFA and H2O. At room temperature, the blue single crystals of 1 transform to the green single crystals of a tetrameric complex, [Cu4(μ3-hep)2(μ2-hep)2(μ2-TFA)2(TFA)2] (2), in presence of alcoholic vapor. The facile single crystal-to-single crystal (SCSC) transformation of 1 to 2 is accompanied by the removal of coordinated H2O molecules in 1 and concomitant formation of four new covalent bonds, two Cu-O(μ3-hep) and two Cu-O(μ2-TFA). The SCSC transformation of 1 to 2 is selective to the alcoholic vapor; the exposure of single crystals of 1 to heat or light or in vacuum has resulted in an immediate loss in crystallinity.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| ID Code: | 24878 |
| Deposited On: | 01 Dec 2010 12:36 |
| Last Modified: | 08 Jun 2011 04:47 |
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