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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Junk, Peter Courtney
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (3/3 displayed)
- 2012Synthesis and characterisation of alkaline earth bis(diphenylphosphano)metallocene complexes and heterobimetallic alkaline earth metal/platinum(II) complexes [Ae(thf)(x)(eta(5)-C5H4PPh2)(2)Pt(Me)(2)] (Ae = Ca, Sr, Ba)citations
- 2010Highly efficient indium(III)-mediated cyclisation of 5-hydroxy-1,3- diketones to 2,3-dihydro-4H-pyran-4-ones; Mechanistic insights from in situ Fourier transform infrared spectroscopycitations
- 2006Synthetic and structural comparisons of bismuth(iii) carboxylates synthesised under solvent-free and reflux conditionscitations
Places of action
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article
Synthetic and structural comparisons of bismuth(iii) carboxylates synthesised under solvent-free and reflux conditions
Abstract
<p>Two synthetic approaches to the formation of bismuth(iii) carboxylates have been explored and compared. Ph<sub>3</sub>Bi was reacted with a series of carboxylic acids (RCO<sub>2</sub>H) of varying pK <sub>a</sub>and functionality (R = PhCH$#x2550;CH, o-MeOC<sub>6</sub>H<sub>4</sub>, m-MeOC<sub>6</sub>H<sub>4</sub>, o-H<sub>2</sub>NC<sub>6</sub>Ho-O<sub>2</sub>NC<sub>6</sub>H<sub>4</sub>, p-O<sub>2</sub>NC<sub>6</sub>H<sub>4</sub>, 2-(C<sub>5</sub>H<sub>4</sub>N)) under reflux conditions in toluene and solvent-free. The thermochemical profiles of the solvent-free reactions were also studied by DSC-TGA. All reactions produced the tri-substituted bismuth carboxylates in comparable yields and purity with the exceptions of picolinic acid and p-nitrobenzoic acid. 2-Picolinic acid exclusively formed the di-substituted complex, [PhBi(2-(C<sub>5</sub>H<sub>4</sub>N)CO<sub>2</sub>)<sub>2</sub>]<sub>4</sub>, by both methods, while p-nitrobenzoic acid gave the tri-substituted complex through reflux and the di-substituted complex under solvent-free conditions. Two of the complexes were structurally authenticated by single crystal X-ray diffraction: [PhBi(2-(C<sub>5</sub>H<sub>4</sub>N)CO<sub>2</sub>)<sub>2</sub>]<sub>4</sub>is tetrameric formed through five membered chelate rings involving the pyridyl N and O(-C) rather than the less stable carboxylate (-CO<sub>2</sub>) chelates, while [Bi(o-MeOC<sub>6</sub>H<sub>4</sub>CO<sub>2</sub>)<sub>3</sub>]<sub>∞</sub>, is a polymer in which dimeric units, constructed around two chelating and one unsymmetrical bridging carboxylate on each Bi centre, are then joined together through longer intermolecular Bi–O bridging bonds.</p>