| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Robson, Richard
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (1/1 displayed)
Places of action
| Organizations | Location | People |
|---|
article
Coordination polymers of 2,5-dihydroxybenzoquinone and chloranilic acid with the (10,3)- A topology
Abstract
<p>Crystalline compounds of general composition (NBu<sub>4</sub>) <sub>2</sub>[M<sup>II</sup><sub>2</sub>(dhbq)<sub>3</sub>] (where M = Mn, Fe, Co, Ni, Zn, and Cd and dhbq<sup>2-</sup> is the dianion of 2,5- dihydroxybenzoquinone) are obtained by reaction of the divalent metal acetate (or the sulfate in the case of Fe) with 2,5-diaminobenzoquinone and an excess of NBu<sub>4</sub>Br in aqueous solution at 115 °C in sealed tubes. The dhbq<sup>2-</sup> ligand is generated in situ by hydrolysis of the 2,5-diaminobenzoquinone. We have been unable to obtain these compounds in a crystalline form suitable for single crystal X-ray diffraction studies directly from H<sub>2</sub>dhbq itself. A structural feature common to this series is the presence of two interpenetrating [M<sup>II</sup><sub>2</sub>(dhbq) <sub>3</sub>]<sup>2-</sup> coordination networks, each with the chiral (10,3)-a topology, with the two independent nets being of opposite hand - unprecedented circumstances for dhbq-based coordination polymers. Crystals of the same zinc compound as that obtained above from 2,5-diaminobenzoquinone can alternatively be obtained by in situ aerial oxidation of 1,2,4,5-tetrahydroxybenzene in the presence of Zn(OAc)<sub>2</sub> and NBu<sub>4</sub>Br in aqueous methanol at room temperature. Analogous in situ aerial oxidation of 1,2,4,5-tetrahydroxy-3, 6-dichlorobenzene in the presence of Mn(OAc)<sub>2</sub> and NBu<sub>4</sub>Br affords crystalline samples of the chloranilate (NBu<sub>4</sub>) <sub>2</sub>[Mn<sup>II</sup><sub>2</sub>(can)<sub>3</sub>], which contains two interpenetrating (10,3)-a [Mn<sup>II</sup><sub>2</sub>(can)<sub>3</sub>] <sup>2-</sup> networks of opposite hand.</p>