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Hermida-Ramón JM, Estévez CM. Towards the Design of Neutral Molecular Tweezers for Anion Recognition. Chemistry 2007; 13:4743-9. [PMID: 17373009 DOI: 10.1002/chem.200601836] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Molecular tweezers are simple molecular receptors that can be characterized by the presence of two flat pincers separated by a more or less rigid tether. They have the ability to form complexes with a substrate molecule by gripping the substrate between the tips of the tweezers in a similar manner to that of mechanical tweezers. Klärner et al. synthesized one of the structurally simplest molecular tweezers, which is reported to bind electrodeficient aromatic and aliphatic substrates as well as organic cations. Complexes between these molecular tweezers and electron-rich aromatic, aliphatic, or anionic substrates have not been observed. Inspired by several recent reports that describe the interaction of hexafluorobenzene with electron-rich sites of molecules, we conducted a theoretical study to show the possibility of building molecular tweezers, based on those synthesized by Klärner, which were able to bind to anions and thus increase their potential as molecular receptors. We characterized complexes formed between several fluorinated derivatives of simple tweezers and an iodine anion, and analyzed the nature of the intermolecular interactions as well as the energetics for the process of complexation. The stabilization trend reflected by the energetic results when fluorine substituents were added to benzene rings confirms our hypothesis about the possibility of obtaining neutral tweezers composed of aromatic rings that can bind anions.
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Venkatasubbaiah K, Bats JW, Rheingold AL, Jäkle F. Rational Synthesis and Complexation Behavior of the Bidentate Lewis Acid 1,2-Bis(chloromercury)ferrocene. Organometallics 2005. [DOI: 10.1021/om0506567] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Krishnan Venkatasubbaiah
- Department of Chemistry, Rutgers University−Newark, 73 Warren Street, Newark, New Jersey 07102, Department of Chemistry and Biochemistry, Institut für Organische Chemie, Johann Wolfgang Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt am Main, Germany, and University of California, San Diego, La Jolla, California 92093
| | - Jan W. Bats
- Department of Chemistry, Rutgers University−Newark, 73 Warren Street, Newark, New Jersey 07102, Department of Chemistry and Biochemistry, Institut für Organische Chemie, Johann Wolfgang Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt am Main, Germany, and University of California, San Diego, La Jolla, California 92093
| | - Arnold L. Rheingold
- Department of Chemistry, Rutgers University−Newark, 73 Warren Street, Newark, New Jersey 07102, Department of Chemistry and Biochemistry, Institut für Organische Chemie, Johann Wolfgang Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt am Main, Germany, and University of California, San Diego, La Jolla, California 92093
| | - Frieder Jäkle
- Department of Chemistry, Rutgers University−Newark, 73 Warren Street, Newark, New Jersey 07102, Department of Chemistry and Biochemistry, Institut für Organische Chemie, Johann Wolfgang Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt am Main, Germany, and University of California, San Diego, La Jolla, California 92093
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Abstract
The synthesis of TAS+ C3N3F4- (1) (TAS+ = (Me2N)3S+) and the reactions of 1 with Me3SiOSiMe3 and Me3SiCF3 to give TAS+ C3N3F2O- (2) and TAS+[(NCF)(NCCF3)(NC(CF3)(2)]- (4) are reported. An isomer of 4, TAS+[(NCCF3)2(NCFCF3)]-, compound 6, was obtained by fluoride ion addition to (CF3CN)3. From the reactions with Me3SiNMe2 neutral fluoroamino triazines C3N3Fn(NMe2)(n-1) (n = 1, 2) were isolated. Possible reaction pathways are discussed, the X-ray structures of 1, 2, 4 and 6 were determined.
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Affiliation(s)
- Melanie Kingston
- Institut für Anorganische und Physikalische Chemie, Universität Bremen, Postfach 330440, Leobener Strasse, 28334 Bremen, Germany
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Garau C, Frontera A, Quiñonero D, Ballester P, Costa A, Deyà PM. A Topological Analysis of the Electron Density in Anion-π Interactions. Chemphyschem 2003; 4:1344-8. [PMID: 14714384 DOI: 10.1002/cphc.200300886] [Citation(s) in RCA: 167] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Carolina Garau
- Departament de Química Universitat de les illes Balears, 07122 Palma de Mallorca, Spain
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Gabbaï F, Schier A, Riede J. Ein bifunktioneller Lewis-saurer Baustein für selbstorganisierte molekulare Treppen und Leitern. Angew Chem Int Ed Engl 1998. [DOI: 10.1002/(sici)1521-3757(19980302)110:5<646::aid-ange646>3.0.co;2-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Affiliation(s)
- Franz P. Schmidtchen
- Institut für Organische Chemie und Biochemie, Technische Universität München, D-85747 Garching, Germany
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Kaul FA, Tschinkl M, Gabbai FP. Alumination of resorcinol and hydroquinone. An easy access to bifunctional Lewis acids. J Organomet Chem 1997. [DOI: 10.1016/s0022-328x(97)00126-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Lork E, Böhler D, Mews R. Fluorphosphazenat-Ionen: ein Weg zur Komplexierung von Fluorid-Ionen. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/ange.19951072330] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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