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Barakat A, El‐Faham A, Haukka M, Al‐Majid AM, Soliman SM. s
‐Triazine pincer ligands: Synthesis of their metal complexes, coordination behavior, and applications. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6317] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Assem Barakat
- Department of Chemistry, College of Science King Saud University PO Box 2455 Riyadh 11451 Saudi Arabia
- Department of Chemistry, Faculty of Science Alexandria University PO Box 426, Ibrahimia Alexandria 21321 Egypt
| | - Ayman El‐Faham
- Department of Chemistry, College of Science King Saud University PO Box 2455 Riyadh 11451 Saudi Arabia
- Department of Chemistry, Faculty of Science Alexandria University PO Box 426, Ibrahimia Alexandria 21321 Egypt
| | - Matti Haukka
- Department of Chemistry University of Jyväskylä PO Box 35 Jyväskylä FI‐40014 Finland
| | | | - Saied M. Soliman
- Department of Chemistry, Faculty of Science Alexandria University PO Box 426, Ibrahimia Alexandria 21321 Egypt
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Martı Nez-Alonso M, Sanz P, Ortega P, Espino G, Jalón FA, Martín M, Rodrı Guez AM, López JA, Tejel C, Manzano BR. Analysis of Ion Pairing in Solid State and Solution in p-Cymene Ruthenium Complexes. Inorg Chem 2020; 59:14171-14183. [PMID: 32930592 DOI: 10.1021/acs.inorgchem.0c01951] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The importance of ion pairing in different fields of chemistry is widely recognized. In this work, we have synthesized a set of cationic p-cymene ruthenium complexes of general formula [(p-cym)Ru(L')(κ2-O^N-L)]X (p-cym = p-cymene; L' = N-methylimidazole (MeIm), N-ethylpiperidylimidazole (EpipIm), 1,3,5-triaza-7-phosphaadamantane (PTA); L = 2-(1H-benzimidazol-2-yl)phenolato (L1), 2-(1,3-benzothiazol-2-yl)phenolato (L2); X = Cl-, BF4-, OTf-, BPh4-). X-ray diffraction studies on selected complexes revealed relatively strong anion-cation interactions in the solid state mainly based on N-H···X (X = Cl, F, O) and C-H···π interactions, also observed in the DFT-modeled complexes in the gas phase. Moreover, NMR studies showed that they exist as intimate ion pairs in solution and, remarkably, as head-to-tail quadruples in the particular case of the cation [(p-cym)Ru(MeIm)(κ2- O^N-L1)]+ ([1]+) with Cl- and BPh4- as counteranions. Furthermore, a value of ΔG = -2.9 kcal mol-1 at 299 K has been estimated for the equilibrium {[1]BPh4···[1]BPh4} ⇆ 2{[1]+···BPh4-} in concentrated CDCl3 solutions. In addition, preliminary studies concerning the cytotoxic properties against HeLa cell lines of the derivatives suggested a positive effect derived from the presence of the lipophilic BPh4- anion and also from the NH group of the benzimidazolyl fragment.
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Affiliation(s)
- Marta Martı Nez-Alonso
- University de Burgos. Departamento de Química, Facultad de Ciencias, Plaza Misael Bañuelos s. n., 09001-Burgos, Spain
| | - Pedro Sanz
- University de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, CRIB, Fac. de Ciencias y Tecnologías Químicas, Avda. C. J. Cela, 10, 13071-Ciudad Real, Spain
| | - Paula Ortega
- University de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, CRIB, Fac. de Ciencias y Tecnologías Químicas, Avda. C. J. Cela, 10, 13071-Ciudad Real, Spain
| | - Gustavo Espino
- University de Burgos. Departamento de Química, Facultad de Ciencias, Plaza Misael Bañuelos s. n., 09001-Burgos, Spain
| | - Félix A Jalón
- University de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, CRIB, Fac. de Ciencias y Tecnologías Químicas, Avda. C. J. Cela, 10, 13071-Ciudad Real, Spain
| | - Mairena Martín
- University de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, CRIB, Fac. de Ciencias y Tecnologías Químicas, Avda. C. J. Cela, 10, 13071-Ciudad Real, Spain
| | - Ana M Rodrı Guez
- University de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, IRICA, Escuela Técnica Superior de Ingenieros Industriales, Avda. C. J. Cela, 3, 13071-Ciudad Real, Spain
| | - José A López
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009-Zaragoza, Spain
| | - Cristina Tejel
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009-Zaragoza, Spain
| | - Blanca R Manzano
- University de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, CRIB, Fac. de Ciencias y Tecnologías Químicas, Avda. C. J. Cela, 10, 13071-Ciudad Real, Spain
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Du J, Wang C, Yin S, Wang W, Mo Y. Resonance-assisted/impaired anion-π interaction: towards the design of novel anion receptors. RSC Adv 2020; 10:36181-36191. [PMID: 35517107 PMCID: PMC9056982 DOI: 10.1039/d0ra07877h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 09/23/2020] [Indexed: 01/23/2023] Open
Abstract
Substituents alter the electron density distribution in benzene in various ways, depending on their electron withdrawing and donating capabilities, as summarized by the empirical Hammett equation. The change of the π electron density distribution subsequently impacts the interaction of substituted benzenes or other cyclic conjugated rings with anions. Currently the design and synthesis of conjugated cyclic receptors capable of binding anions is an active field due to their applications in the sensing and removal of environmental contaminants and molecular recognition. By using the block-localized wavefunction (BLW) method, which is a variant of ab initio valence bond (VB) theory and can derive the reference resonance-free state self-consistently, we quantified the resonance-assisted (RA) or resonance-impaired (RI) phenomena in anion–π interactions from both structural and energetic perspectives. The frozen interaction, in which the electrostatic attraction is involved, has been shown to be the governing factor for the RA or RI interactions with anions. Energy analyses based on the empirical point charge (EPC) model indicated that the anion–π interactions can be simplified as the attraction between a negative point charge (anion) and a group of local dipoles, affected by the enriched or diminished π-cloud due to the resonance between the substituents and the conjugated ring. Hence, two strategies for the design of novel anion receptors can be envisioned. One is the enhancement of the magnitudes and/or numbers of local dipoles (polarized σ bonds), and the other is the reduction of π electron density in conjugated rings. For cases with the RI characteristics, “curved” aromatic molecules are preferred to be anion receptors. Indeed, extremely strong binding was found in complexes formed with fluorinated corannulene (F-CDD) and fluorinated [5]cycloparaphenylene (F-[5]CPP). Inspired by the RA phenomenon, complexes of p-, o- and m-benzoquinones with halides were revisited. Substituents alter the electron density distribution in benzene in various ways, depending on their electron withdrawing and donating capabilities, as summarized by the empirical Hammett equation.![]()
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Affiliation(s)
- Juan Du
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University Xi'an 710119 China
| | - Changwei Wang
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University Xi'an 710119 China
| | - Shiwei Yin
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University Xi'an 710119 China
| | - Wenliang Wang
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University Xi'an 710119 China
| | - Yirong Mo
- Department of Nanoscience Joint School of Nanoscience & Nanoengineering, University of North Carolina at Greensboro Greensboro NC 27401 USA
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Kordeyro Magrino D, Korshunov V, Lyssenko K, Gontcharenko V, Belousov Y, Pettinari C, Taydakov I. Luminescent complexes of Eu3+,Tb3+ and Gd3+ nitrates with polytopic ligand 2,4,6-tris(1H-pyrazol-1-yl)-1,3,5-triazine. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119764] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Capel Berdiell I, Farmiloe SE, Kulmaczewski R, Halcrow MA. Molecular squares, coordination polymers and mononuclear complexes supported by 2,4-dipyrazolyl-6H-1,3,5-triazine and 4,6-dipyrazolylpyrimidine ligands. Dalton Trans 2019; 48:17310-17320. [PMID: 31720621 DOI: 10.1039/c9dt04003j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The Fe[BF4]2 complex of 2,4-di(pyrazol-1-yl)-6H-1,3,5-triazine (L1) is a high-spin molecular square, [{Fe(L1)}4(μ-L1)4][BF4]8, whose crystals also contain the unusual HPzBF3 (HPz = pyrazole) adduct. Three other 2,4-di(pyrazol-1-yl)-6H-1,3,5-triazine derivatives with different pyrazole substituents (L2-L4) are unstable in the presence of first row transition ions, but form mononuclear, polymeric or molecular square complexes with silver(i). Most of these compounds involve bis-bidentate di(pyrazolyl)triazine coordination, which is unusual for that class of ligand, and the molecular squares encapsulate one or two BF4-, ClO4- or SbF6- ions through combinations of anionπ, AgX and/or C-HX (X = O or F) interactions. Treatment of Fe[NCS]2 or Fe[NCSe]2 with 4,6-di(pyrazol-1-yl)-2H-pyrimidine (L5) or its 2-methyl and 2-amino derivatives (L6 and L7) yields mononuclear [Fe(NCE)2L2] and/or the 1D coordination polymers catena-[Fe(NCE)2(μ-L)] (E = S or Se, L = L5-L7). Alcohol solvates of isomorphous [Fe(NCS)2L2] and [Fe(NCSe)2L2] compounds show different patterns of intermolecular hydrogen bonding, reflecting the acceptor properties of the anion ligands. These iron compounds are all high-spin, although annealing solvated crystals of [Fe(NCSe)2(L5)2] affords a new phase exhibiting an abrupt, low-temperature spin transition. Catena-[Fe(H2O)2(μ-L5)][ClO4]2 is a coordination polymer of alternating cis and trans iron centres.
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Affiliation(s)
- Izar Capel Berdiell
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK.
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Berdiell IC, Kulak AN, Warriner SL, Halcrow MA. Heterometallic Coordination Polymer Gels Supported by 2,4,6-Tris(pyrazol-1-yl)-1,3,5-triazine. ACS OMEGA 2018; 3:18466-18474. [PMID: 31458419 PMCID: PMC6644042 DOI: 10.1021/acsomega.8b02508] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 12/13/2018] [Indexed: 05/04/2023]
Abstract
Complexes of type [M(tpt)2]X2 (M2+ = Fe2+, Co2+, Ni2+; tpt = 2,4,6-tri{pyrazol-1-yl}-1,3,5-triazine; X- = BF4 - or ClO4 -) crystallize in a cubic lattice, with the metal ion and ligand conformation showing unusual symmetry-imposed disorder. Addition of 1 equiv AgX to the corresponding preformed [M(tpt)2]X2 salt in concentrated MeNO2 solution affords thixotropic gels. Gelation was not observed in analogous reactions using [Mn(tpt)2][ClO4]2, or from reactions in other, more donating solvents. Scanning electron microscopy (SEM) images from dilute solutions of the reagents confirmed the fibrous microstructure of the gels and their homogeneous elemental composition. However, energy-dispersive X-ray data show a reduced Fe/Ag ratio compared to the Co/Ag and Ni/Ag gels, where a 1:1 ratio of metals is evident. More concentrated gels decomposed to silver nanoparticles during SEM sample preparation. Mass spectrometry and 1H NMR indicate that silver induces partial ligand displacement reactions in [Fe(tpt)2]2+ and [Co(tpt)2]2+, but not in [Ni(tpt)2]2+. Hence, the strength of the gels, which follows the order M = Mn (no gel) < Fe < Co < Ni, correlates with the stability of octahedral [M(tpt)2]2+ under gelation conditions. Iron(II) complexes of the related ligands 2,4,6-tri{pyrazol-1-yl}pyridine (tpp) and 2,4,6-tri{pyrazol-1-yl}pyrimidine (tpym) did not undergo gelation with silver salts under the above conditions. The unique properties of tpt as a gelator in this work may reflect the crystallographically observed ability of metal-coordinated tpt to chelate to exogenous silver ions, through its pendant pyrazolyl group and triazinyl N donors. In contrast, the pendant azolyl substituents in silver complexes of the nongelators tpp and tpym only bind exogenous silver in monodentate fashion.
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Lin JS, Li TT, Liu JR, Jiao GY, Gu QS, Cheng JT, Guo YL, Hong X, Liu XY. Cu/Chiral Phosphoric Acid-Catalyzed Asymmetric Three-Component Radical-Initiated 1,2-Dicarbofunctionalization of Alkenes. J Am Chem Soc 2018; 141:1074-1083. [DOI: 10.1021/jacs.8b11736] [Citation(s) in RCA: 118] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jin-Shun Lin
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Tao-Tao Li
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Ji-Ren Liu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Guan-Yuan Jiao
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Qiang-Shuai Gu
- SUSTech Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China
| | - Jiang-Tao Cheng
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yu-Long Guo
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xin Hong
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Xin-Yuan Liu
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
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Soliman SM, El-Faham A. Synthesis, characterization, and structural studies of two heteroleptic Mn(II) complexes with tridentate N,N,N-pincer type ligand. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1475660] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Saied M. Soliman
- Department of Chemistry, Rabigh College of Science and Art, King Abdulaziz University, Jeddah, Saudi Arabia
- Faculty of Science, Department of Chemistry, Alexandria University, Alexandria, Egypt
| | - Ayman El-Faham
- Faculty of Science, Department of Chemistry, Alexandria University, Alexandria, Egypt
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
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Capel Berdiell I, Warriner SL, Halcrow MA. Silver(i) complexes of bis- and tris-(pyrazolyl)azine derivatives - dimers, coordination polymers and a pentametallic assembly. Dalton Trans 2018; 47:5269-5278. [PMID: 29565079 DOI: 10.1039/c8dt00640g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silver(i) complexes of 2,4,6-tri(pyrazol-1-yl)pyridine (tpp), 2,4,6-tri(pyrazol-1-yl)pyrimidine (tpym), 2,4,6-tri(pyrazol-1-yl)-1,3,5-triazine (tpt) and 2,4-di(pyrazol-1-yl)-1,3,5-triazine (bpt) are reported. Dinuclear [Ag2(μ-tpp)2(MeCN)2][BF4]2·2MeCN and [Ag2(μ-tpym)2(MeCN)2][BF4]2 are formed from approximately planar [AgL(NCMe)]+ (L = tpp or bpym) centres, which dimerise via apical interactions to the pendant pyrazolyl donor on each ligand. Two polymeric solvatomorph phases [Ag2(μ-tpp)2][BF4]2·nMeNO2 were obtained by crystallising AgBF4 and tpp from nitromethane solution. One is composed of the same dimeric [Ag2(μ-tpp)2]2+ motif as the MeCN solvates, but with semibridging pyrazolyl substitutents replacing the solvent ligands. The other form has helicate [Ag2(μ-tpp)2]2+ dimers linked into chains by unsupported AgAg interactions. In contrast, [Ag5(μ3-tpym)4][BF4]5·2MeNO2 contains discrete pentametallic assemblies, of a flattened [Ag4(μ-tpym)4]4+ molecular square centred by the fifth silver ion. Three helical or linear 1D coordination polymer topologies are described for [Ag(μ-tpt)]X (X- = BF4- or ClO4-), where ditopic tpt ligands bind one silver ion in a [2 + 1] geometry and the other in bidentate, [1 + 1] or monodentate fashion. Finally, [Ag(bpt)]BF4 is a polymer of square planar silver ions linked by bis-bidentate bpt ligands. Most of the tpt and bpt structures include short anionπ contacts to the ligand triazinyl rings. Electrospray mass spectra confirm the oligomeric nature of the Ag/tpym and tpt complexes in MeNO2 solution.
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Ortolan AO, Østrøm I, Caramori GF, Parreira RLT, da Silva EH, Bickelhaupt FM. Tuning Heterocalixarenes to Improve Their Anion Recognition: A Computational Approach. J Phys Chem A 2018. [DOI: 10.1021/acs.jpca.8b01866] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Alexandre O. Ortolan
- Departamento de Química, Universidade Federal de Santa Catarina, Campus Universitário Trindade, CP 476, Florianópolis, SC 88040-900, Brazil
| | - Ina Østrøm
- Departamento de Química, Universidade Federal de Santa Catarina, Campus Universitário Trindade, CP 476, Florianópolis, SC 88040-900, Brazil
| | - Giovanni F. Caramori
- Departamento de Química, Universidade Federal de Santa Catarina, Campus Universitário Trindade, CP 476, Florianópolis, SC 88040-900, Brazil
| | - Renato L. T. Parreira
- Núcleo de Pesquisas em Ciências Exatas e Tecnológicas, Universidade de Franca, 14404-600 Franca, SP, Brazil
| | - Eder H. da Silva
- Núcleo de Pesquisas em Ciências Exatas e Tecnológicas, Universidade de Franca, 14404-600 Franca, SP, Brazil
| | - F. Matthias Bickelhaupt
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
- Institute of Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
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Torres J, Carrión MC, Leal J, Jalón FA, Cuevas JV, Rodríguez AM, Castañeda G, Manzano BR. Cationic Bis(cyclometalated) Ir(III) Complexes with Pyridine–Carbene Ligands. Photophysical Properties and Photocatalytic Hydrogen Production from Water. Inorg Chem 2018; 57:970-984. [DOI: 10.1021/acs.inorgchem.7b02289] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
| | - M. Carmen Carrión
- Fundación Parque Científico y Tecnológico de Castilla-La Mancha, Bulevar Rio Alberche s/n, 45007 Toledo, Spain
| | | | | | - José V. Cuevas
- Departamento de Química,
Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Ana M. Rodríguez
- Escuela Superior de Ingenieros Industriales, Avda,
C. J. Cela, 3, 13071 Ciudad Real, Spain
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Capel Berdiell I, Kulmaczewski R, Halcrow MA. Iron(II) Complexes of 2,4-Dipyrazolyl-1,3,5-triazine Derivatives-The Influence of Ligand Geometry on Metal Ion Spin State. Inorg Chem 2017; 56:8817-8828. [PMID: 28699741 DOI: 10.1021/acs.inorgchem.7b00699] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Seven [FeL2][BF4]2 complex salts were prepared, where L is a 6-substituted 2,4-di(pyrazol-1-yl)-1,3,5-triazine (bpt) derivative. The complexes are all crystallographically high-spin, and exhibit significant distortions from an ideal D2d-symmetric coordination geometry. In one case, an unusual type of metal ion disorder was observed among a cubic array of ligands in the crystal lattice. The complexes are also high-spin between 3 and 300 K in the solid state and, where measured, between 239 and 333 K in CD3CN solution. This result is unexpected, since homoleptic iron(II) complexes of related 2,6-di(pyrazol-1-yl)pyridine, 2,6-di(pyrazol-1-yl)pyrazine, and 2,6-di(pyrazol-1-yl)pyrimidine derivatives often exhibit thermal spin-crossover behavior. Gas-phase density functional theory calculations confirm the high-spin form of [Fe(bpt)2]2+ and its derivatives is stabilized relative to iron(II) complexes of the other ligand types. This reflects a weaker Fe/pyrazolyl σ-bonding interaction, which we attribute to a small narrowing of the chelate ligand bite angle associated with the geometry of the 1,3,5-triazinyl ring. Hence, the high-spin state of [Fe(bpt)2]2+ centers does not reflect the electronic properties of its heterocyclic ligand donors but is imposed by the bpt ligand conformation. A high-spin homoleptic iron(III) complex of one of the bpt derivatives was also synthesized.
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Affiliation(s)
- Izar Capel Berdiell
- School of Chemistry, University of Leeds , Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Rafal Kulmaczewski
- School of Chemistry, University of Leeds , Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Malcolm A Halcrow
- School of Chemistry, University of Leeds , Woodhouse Lane, Leeds LS2 9JT, U.K
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Chu JF, Zhang MY, Wang YQ. Syntheses, Crystal Structures, and Properties of Three Copper(II) Complexes Constructed by 4-(4,6-Bis(1H-pyrazol-1-yl)-1,3,5-triazin-2-yl)morpholine. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700177] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jin-Feng Chu
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; 100029 Beijing P. R. China
| | - Ming-Yu Zhang
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; 100029 Beijing P. R. China
| | - You-Qing Wang
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; 100029 Beijing P. R. China
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Abstract
The σ-hole and π-hole are the regions with positive surface electrostatic potential on the molecule entity; the former specifically refers to the positive region of a molecular entity along extension of the Y-Ge/P/Se/X covalent σ-bond (Y = electron-rich group; Ge/P/Se/X = Groups IV-VII), while the latter refers to the positive region in the direction perpendicular to the σ-framework of the molecular entity. The directional noncovalent interactions between the σ-hole or π-hole and the negative or electron-rich sites are named σ-hole bond or π-hole bond, respectively. The contributions from electrostatic, charge transfer, and other terms or Coulombic interaction to the σ-hole bond and π-hole bond were reviewed first followed by a brief discussion on the interplay between the σ-hole bond and the π-hole bond as well as application of the two types of noncovalent interactions in the field of anion recognition. It is expected that this review could stimulate further development of the σ-hole bond and π-hole bond in theoretical exploration and practical application in the future.
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Affiliation(s)
- Hui Wang
- College of Chemistry, Beijing Normal University , Beijing 100875, People's Republic of China
| | - Weizhou Wang
- College of Chemistry and Chemical Engineering, Luoyang Normal University , Luoyang 471022, People's Republic of China
| | - Wei Jun Jin
- College of Chemistry, Beijing Normal University , Beijing 100875, People's Republic of China
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Affiliation(s)
- A. Subha Mahadevi
- Centre for Molecular Modelling, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad, India 500607
| | - G. Narahari Sastry
- Centre for Molecular Modelling, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad, India 500607
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Manzano BR, Jalón FA, Carrión MC, Durá G. Bis(pyrazol-1-yl)(pyridin-x-yl)methane Ligands - Mono- or Ditopic Ligands in Complexes and Supramolecular Frameworks. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501271] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Blanca R. Manzano
- Departamento de Química Inorgánica, Orgánica y Bioquímica; Facultad de Ciencias y Tecnologías Químicas-IRICA; Universidad de Castilla-La Mancha; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
| | - Félix A. Jalón
- Departamento de Química Inorgánica, Orgánica y Bioquímica; Facultad de Ciencias y Tecnologías Químicas-IRICA; Universidad de Castilla-La Mancha; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
| | - M. Carmen Carrión
- Departamento de Química Inorgánica, Orgánica y Bioquímica; Facultad de Ciencias y Tecnologías Químicas-IRICA; Universidad de Castilla-La Mancha; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
- Facultad de Ciencias y Tecnologías Químicas-IRICA; Fundación Parque Científico y Tecnológico de Castilla-La Mancha (Fundación PCTCLM); Bulevar Río Alberche s/n 45007 Toledo Spain
| | - Gema Durá
- Departamento de Química Inorgánica, Orgánica y Bioquímica; Facultad de Ciencias y Tecnologías Químicas-IRICA; Universidad de Castilla-La Mancha; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
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Farajpour E, Sohrabi B, Beheshtian J. Selective separation behavior of graphene flakes in interaction with halide anions in the presence of an external electric field. Phys Chem Chem Phys 2016; 18:7293-9. [DOI: 10.1039/c5cp07710a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The adsorption of halide anions in the absence, and presence, of a perpendicularly external electric field on the C54H18 graphene surface has been investigated using M06-2X/6-31G(d,p) density functional theory (DFT).
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Affiliation(s)
- E. Farajpour
- Department of Chemistry
- Surface Chemistry Research Laboratory
- Iran University of Science and Technology
- Tehran
- Iran
| | - B. Sohrabi
- Department of Chemistry
- Surface Chemistry Research Laboratory
- Iran University of Science and Technology
- Tehran
- Iran
| | - J. Beheshtian
- Chemistry Department
- Faculty of Sciences
- Shahid Rajaee Teacher Training University
- Tehran
- Iran
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18
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Durá G, Carrión MC, Jalón FA, Manzano BR, Rodríguez AM. Formation of Mono‐, Di‐ and Trinuclear Species in the Self‐Assembly of Bis(pyrazolyl)(pyridin‐3‐yl)methane Ligands and Metals with Different Coordination Geometries. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201501077] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Gema Durá
- Universidad de Castilla‐La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas‐IRICA, Avda. C. J. Cela, 10, 13071 Ciudad Real, Spain, http://www.uclm.es/grupo/qca/
| | - M. Carmen Carrión
- Universidad de Castilla‐La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas‐IRICA, Avda. C. J. Cela, 10, 13071 Ciudad Real, Spain, http://www.uclm.es/grupo/qca/
- Fundación Parque Científico y Tecnológico de Castilla‐La Mancha (Fundación PCTCLM), Bulevar Río Alberche s/n, 45007 Toledo, Spain
| | - Félix A. Jalón
- Universidad de Castilla‐La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas‐IRICA, Avda. C. J. Cela, 10, 13071 Ciudad Real, Spain, http://www.uclm.es/grupo/qca/
| | - Blanca R. Manzano
- Universidad de Castilla‐La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas‐IRICA, Avda. C. J. Cela, 10, 13071 Ciudad Real, Spain, http://www.uclm.es/grupo/qca/
| | - Ana M. Rodríguez
- Universidad de Castilla‐La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, Escuela Técnica Superior de Ingenieros Industriales, Avda. C. J. Cela, 3, 13071 Ciudad Real, Spain
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19
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Molecular design and the optimum synthetic route of the compounds with multi-pyrazole and its derivatives and the potential application in antibacterial agents. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.06.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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20
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Structural diversity in the self-assembly of silver(I) complexes containing 2,6-dimethyl-3,5-dicyano-4-(4-quinolinyl)-1,4-dihydropyridine. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2014.10.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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Synthesis, characterization and preliminary reactivity behaviors with transitional metals of a new polydentate N-donor ligand. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.04.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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22
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Seth P, Bauzá A, Frontera A, Ghosh A. Analyses of supramolecular interactions present in a coordination polymer of Mn(II) with 2-picolinate and 4,4′-Azobis(pyridine). INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2013.12.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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23
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Kelemu SW, Fitchett CM, Polson MI, Wikaira JL, Steel PJ. Silver coordination polymers derived from two isomeric ligands with three pendant allyl arms. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.09.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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24
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Durá G, Carrión MC, Jalón FA, Manzano BR, Rodríguez AM. Dinuclear Species versus Zigzag or Helical Polymers in Palladium, Zinc, and Copper Complexes with Ditopic Bis(pyrazolyl)methane Ligands. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300948] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Gong HY, Rambo BM, Lynch VM, Keller KM, Sessler JL. “Texas-Sized” Molecular Boxes: Building Blocks for the Construction of Anion-Induced Supramolecular Species via Self-Assembly. J Am Chem Soc 2013; 135:6330-7. [DOI: 10.1021/ja401893w] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Han-Yuan Gong
- Department of Chemistry and
Biochemistry, The University of Texas at Austin, Welch Hall 2.204, 105 East 24th Street, Stop A5300, Austin, Texas
78712-1224, United States
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Brett M. Rambo
- Department of Chemistry and
Biochemistry, The University of Texas at Austin, Welch Hall 2.204, 105 East 24th Street, Stop A5300, Austin, Texas
78712-1224, United States
- Akermin Inc., 1005 North Warson Road,
Suite 101, St. Louis, Missouri 63132, United
States
| | - Vincent M. Lynch
- Department of Chemistry and
Biochemistry, The University of Texas at Austin, Welch Hall 2.204, 105 East 24th Street, Stop A5300, Austin, Texas
78712-1224, United States
| | - Karin M. Keller
- Department of Chemistry and
Biochemistry, The University of Texas at Austin, Welch Hall 2.204, 105 East 24th Street, Stop A5300, Austin, Texas
78712-1224, United States
| | - Jonathan L. Sessler
- Department of Chemistry and
Biochemistry, The University of Texas at Austin, Welch Hall 2.204, 105 East 24th Street, Stop A5300, Austin, Texas
78712-1224, United States
- Department of Chemistry, Yonsei University, Seoul 120-749, Korea
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26
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Wang X, Xing YH, Bai FY, Wang XY, Guan QL, Hou YN, Zhang R, Shi Z. Synthesis, structure, and surface photovoltage properties of a series of novel d7–d10 metal complexes with pincer N-heterocycle ligands. RSC Adv 2013. [DOI: 10.1039/c3ra41459k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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27
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Pilar Carranza M, Manzano BR, Jalón FA, Rodríguez AM, Santos L, Moreno M. Experimental and theoretical evidence of unsupported Ag–Ag interactions in complexes with triazine-based ligands. Subtle effects of the symmetry of the triazine substituents. NEW J CHEM 2013. [DOI: 10.1039/c3nj00738c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Chen C, Sun Q, Ren DX, Zhang R, Bai FY, Xing YH, Shi Z. Bromoperoxidase mimic as catalysts for oxidative bromination—synthesis, structures and properties of the diversified oxidation state of vanadium(iii, iv and v) complexes with pincer N-heterocycle ligands. CrystEngComm 2013. [DOI: 10.1039/c3ce40410b] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Martí I, Rubio J, Bolte M, Burguete MI, Vicent C, Quesada R, Alfonso I, Luis SV. Tuning Chloride Binding, Encapsulation, and Transport by Peripheral Substitution of Pseudopeptidic Tripodal Small Cages. Chemistry 2012; 18:16728-41. [DOI: 10.1002/chem.201202182] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Indexed: 11/05/2022]
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Li S, Wang DX, Wang MX. Rational design of a functionalized oxacalix[2]arene[2]triazine host for selective recognition of H2PO4− by cooperative anion–π and hydrogen bond interactions. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.09.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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31
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Espino G, Jalón FA, Manzano BR, Pérez-Manrique M, Mereiter K, Quiñonero D. Synthesis and structure of cis-[RuCl(bpzm)(κ1-P-dpim)(κ2-P,N-dpim)]Cl·(CHCl3)5. Stability of [Cl(HCCl3) n ]− aggregates. Supramol Chem 2012. [DOI: 10.1080/10610278.2012.717697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Gustavo Espino
- a Departamento de Química , Facultad de Ciencias, Universidad de Burgos , Pza. Misael Bañuelos s/n, 09001 , Burgos , Spain
| | - Félix A. Jalón
- b Departamento de Química Inorgánica , Orgánica y Bioquímica, Universidad de Castilla-La Mancha , 13071 , Ciudad Real , Spain
| | - Blanca R. Manzano
- b Departamento de Química Inorgánica , Orgánica y Bioquímica, Universidad de Castilla-La Mancha , 13071 , Ciudad Real , Spain
| | - Mercedes Pérez-Manrique
- a Departamento de Química , Facultad de Ciencias, Universidad de Burgos , Pza. Misael Bañuelos s/n, 09001 , Burgos , Spain
| | - Kurt Mereiter
- c Faculty of Technical Chemistry, Vienna University of Technology , Getreidemarkt 9/164-SC, A-1060 , Vienna , Austria
| | - David Quiñonero
- d Departament de Química , Universitat de les Illes Balears , Crta. Valldemossa km 7.5, 07122 , Palma de Mallorca , Spain
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32
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Gao EJ, Wang RS, Lin L, Liu SH, Sun TD, Zhu MC. Synthesis, crystal structure, and fluorescence properties of a novel coordination polymer [Zn(L)(4,4′-bipyridine)(H2O)] n · (H2O)4. RUSS J COORD CHEM+ 2012. [DOI: 10.1134/s1070328412050028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Shi G, Ding Y, Fang H. Unexpectedly strong anion-π interactions on the graphene flakes. J Comput Chem 2012; 33:1328-37. [DOI: 10.1002/jcc.22964] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Accepted: 02/16/2012] [Indexed: 11/07/2022]
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34
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Manna P, Seth SK, Das A, Hemming J, Prendergast R, Helliwell M, Choudhury SR, Frontera A, Mukhopadhyay S. Anion induced formation of supramolecular associations involving lone pair-π and anion-π interactions in Co(II) malonate complexes: experimental observations, Hirshfeld surface analyses and DFT studies. Inorg Chem 2012; 51:3557-71. [PMID: 22356090 DOI: 10.1021/ic202317f] [Citation(s) in RCA: 183] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three Co(II)-malonate complexes, namely, (C(5)H(7)N(2))(4)[Co(C(3)H(2)O(4))(2)(H(2)O)(2)](NO(3))(2) (1), (C(5)H(7)N(2))(4)[Co(C(3)H(2)O(4))(2)(H(2)O)(2)](ClO(4))(2) (2), and (C(5)H(7)N(2))(4)[Co(C(3)H(2)O(4))(2)(H(2)O)(2)](PF(6))(2) (3) [C(5)H(7)N(2) = protonated 2-aminopyridine, C(3)H(4)O(4) = malonic acid, NO(3)(-) = nitrate, ClO(4)(-) = perchlorate, PF(6)(-) = hexafluorophosphate], have been synthesized from purely aqueous media, and their crystal structures have been determined by single crystal X-ray diffraction. A thorough analysis of Hirshfeld surfaces and fingerprint plots facilitates a comparison of intermolecular interactions in 1-3, which are crucial in building supramolecular architectures. When these complexes are structurally compared with their previously reported analogous Ni(II) or Mg(II) compounds, a very interesting feature regarding the role of counteranions has emerged. This phenomenon can be best described as anion-induced formation of extended supramolecular networks of the type lone pair-π/π-π/π-anion-π/π-lone pair and lone pair-π/π-π/π-anion involving various weak forces like lone pair-π, π-π, and anion-π interactions. The strength of these π contacts has been estimated using DFT calculations (M06/6-31+G*), and the formation energy of the supramolecular networks has been also evaluated. The influence of the anion (NO(3)(-), ClO(4)(-), and PF(6)(-)) on the total interaction energy of the assembly is also studied.
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Affiliation(s)
- Prankrishna Manna
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
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35
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Notash B, Safari N, Khavasi HR. Anion-controlled structural motif in one-dimensional coordination networks via cooperative weak noncovalent interactions. CrystEngComm 2012. [DOI: 10.1039/c2ce25554e] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Wang DX, Fa SX, Liu Y, Hou BY, Wang MX. Anion-directed assembly of a rectangular supramolecular cage in the solid state with electron-deficient phenoxylated oxacalix[2]arene[2]triazine. Chem Commun (Camb) 2012; 48:11458-60. [DOI: 10.1039/c2cc36465d] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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37
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Koley M, Kirchner K, Mereiter K. Tris(acetonitrile-κN){2,6-bis-[(diphenyl-phosphan-yl)amino]-4-eth-oxy-1,3,5-triazine-κP,N,P'}iron(II) bis-(tetra-fluorido-borate) acetonitrile disolvate. Acta Crystallogr Sect E Struct Rep Online 2011; 67:m1842-3. [PMID: 22199616 PMCID: PMC3238739 DOI: 10.1107/s1600536811049804] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2011] [Accepted: 11/21/2011] [Indexed: 11/10/2022]
Abstract
In the title compound, [Fe(CH(3)CN)(3)(C(29)H(27)N(5)OP(2))](BF(4))(2)·2CH(3)CN, the Fe(II) ion is octa-hedrally coordinated by a meridionally chelating tridentate pincer-type PNP ligand derived from 2,6-diamino-4-eth-oxy-1,3,5-triazine and by three acetonitrile mol-ecules. The four Fe-N bond lengths range from 1.9142 (12) to 1.9579 (11) Å, while the Fe-P bonds are 2.2452 (4) and 2.2506 (4) Å [P-Fe-P = 165.523 (14)°], consistent with Fe(II) in a low-spin state. Unlike related Fe PNP complexes based on 2,6-diamino-pyridine, the BF(4) anions are not hydrogen bonded to the two NH groups of the pincer ligand but show instead anion-π inter-actions with the triazine ring and acetonitrile mol-ecules in addition to ten C-H⋯F inter-actions. Most remarkable among these is an anion-π(triazine) inter-action with a short distance of 2.788 (2) Å between one F and the centroid of the π-acidic triazine ring. The corresponding shortest distance between this F atom and a triazine carbon atom is 2.750 (2) Å. The two NH groups of the pincer ligand donate N-H⋯N hydrogen bonds to the triazine N atom of a neighbouring complex and to an uncoordinated acetonitrile mol-ecule. This last mol-ecule is in a side-on head-to-tail association with the second uncoordinated acetonitrile at C⋯N distances of 3.467 (2) and 3.569 (2) Å. In contrast to several related compounds with diamino-pyridine- instead of diamino-triazine-based PNP ligands, the title crystal structure is remarkably well ordered. This suggests that the diamino-triazine moiety exerts notable crystal structure stabilizing effects.
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Gao EJ, Zhang Y, Lin L, Wang RS, Dai L, Liang Q, Zhu MC, Wang ML, Liu L, He WX, Zhang YJ. Mixed-ligand manganese(II)-phenolate complexes: study of DNA cleavage, cytotoxic activity, and induction of apoptosis. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.634910] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- En-Jun Gao
- a Department of Coordination Chemistry, International Key Laboratory of Shenyang Inorganic Molecule-Based Chemical , Shenyang University of Chemical Technology , Shenyang 110142, China
| | - Ying Zhang
- a Department of Coordination Chemistry, International Key Laboratory of Shenyang Inorganic Molecule-Based Chemical , Shenyang University of Chemical Technology , Shenyang 110142, China
| | - Lin Lin
- a Department of Coordination Chemistry, International Key Laboratory of Shenyang Inorganic Molecule-Based Chemical , Shenyang University of Chemical Technology , Shenyang 110142, China
| | - Ren-Shu Wang
- a Department of Coordination Chemistry, International Key Laboratory of Shenyang Inorganic Molecule-Based Chemical , Shenyang University of Chemical Technology , Shenyang 110142, China
| | - Lei Dai
- a Department of Coordination Chemistry, International Key Laboratory of Shenyang Inorganic Molecule-Based Chemical , Shenyang University of Chemical Technology , Shenyang 110142, China
| | - Qi Liang
- a Department of Coordination Chemistry, International Key Laboratory of Shenyang Inorganic Molecule-Based Chemical , Shenyang University of Chemical Technology , Shenyang 110142, China
| | - Ming-Chang Zhu
- a Department of Coordination Chemistry, International Key Laboratory of Shenyang Inorganic Molecule-Based Chemical , Shenyang University of Chemical Technology , Shenyang 110142, China
| | - Mei-Lin Wang
- a Department of Coordination Chemistry, International Key Laboratory of Shenyang Inorganic Molecule-Based Chemical , Shenyang University of Chemical Technology , Shenyang 110142, China
| | - Lei Liu
- a Department of Coordination Chemistry, International Key Laboratory of Shenyang Inorganic Molecule-Based Chemical , Shenyang University of Chemical Technology , Shenyang 110142, China
| | - Wen-Xuan He
- a Department of Coordination Chemistry, International Key Laboratory of Shenyang Inorganic Molecule-Based Chemical , Shenyang University of Chemical Technology , Shenyang 110142, China
| | - Yan-Jin Zhang
- a Department of Coordination Chemistry, International Key Laboratory of Shenyang Inorganic Molecule-Based Chemical , Shenyang University of Chemical Technology , Shenyang 110142, China
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Manzur J, Acuña C, Vega A, García AM. Copper(II) assisted hydrolysis of 2,4,6-tris(pyrazol-1-yl)-1,3,5-triazine. Crystal and molecular structure of catena-[CuL(H2O)Cl]n (L=2,4-dione-1,3,5-(1H)-triazin-1-amido). Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.03.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Nishio M. The CH/π hydrogen bond in chemistry. Conformation, supramolecules, optical resolution and interactions involving carbohydrates. Phys Chem Chem Phys 2011; 13:13873-900. [PMID: 21611676 DOI: 10.1039/c1cp20404a] [Citation(s) in RCA: 633] [Impact Index Per Article: 48.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The CH/π hydrogen bond is an attractive molecular force occurring between a soft acid and a soft base. Contribution from the dispersion energy is important in typical cases where aliphatic or aromatic CH groups are involved. Coulombic energy is of minor importance as compared to the other weak hydrogen bonds. The hydrogen bond nature of this force, however, has been confirmed by AIM analyses. The dual characteristic of the CH/π hydrogen bond is the basis for ubiquitous existence of this force in various fields of chemistry. A salient feature is that the CH/π hydrogen bond works cooperatively. Another significant point is that it works in nonpolar as well as polar, protic solvents such as water. The interaction energy depends on the nature of the molecular fragments, CH as well as π-groups: the stronger the proton donating ability of the CH group, the larger the stabilizing effect. This Perspective focuses on the consequence of this molecular force in the conformation of organic compounds and supramolecular chemistry. Implication of the CH/π hydrogen bond extends to the specificity of molecular recognition or selectivity in organic reactions, polymer science, surface phenomena and interactions involving proteins. Many problems, unsettled to date, will become clearer in the light of the CH/π paradigm.
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Affiliation(s)
- Motohiro Nishio
- The CHPI Institute, 705-6-338 Minamioya, Machida-shi, Tokyo, 194-0031, Japan.
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Salonen LM, Ellermann M, Diederich F. Aromatische Ringe in chemischer und biologischer Erkennung: Energien und Strukturen. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007560] [Citation(s) in RCA: 245] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Salonen LM, Ellermann M, Diederich F. Aromatic rings in chemical and biological recognition: energetics and structures. Angew Chem Int Ed Engl 2011; 50:4808-42. [PMID: 21538733 DOI: 10.1002/anie.201007560] [Citation(s) in RCA: 1172] [Impact Index Per Article: 90.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Indexed: 12/12/2022]
Abstract
This review describes a multidimensional treatment of molecular recognition phenomena involving aromatic rings in chemical and biological systems. It summarizes new results reported since the appearance of an earlier review in 2003 in host-guest chemistry, biological affinity assays and biostructural analysis, data base mining in the Cambridge Structural Database (CSD) and the Protein Data Bank (PDB), and advanced computational studies. Topics addressed are arene-arene, perfluoroarene-arene, S⋅⋅⋅aromatic, cation-π, and anion-π interactions, as well as hydrogen bonding to π systems. The generated knowledge benefits, in particular, structure-based hit-to-lead development and lead optimization both in the pharmaceutical and in the crop protection industry. It equally facilitates the development of new advanced materials and supramolecular systems, and should inspire further utilization of interactions with aromatic rings to control the stereochemical outcome of synthetic transformations.
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Affiliation(s)
- Laura M Salonen
- Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, Hönggerberg, HCI, 8093 Zurich, Switzerland
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Philip V, Harris J, Adams R, Nguyen D, Spiers J, Baudry J, Howell EE, Hinde RJ. A survey of aspartate-phenylalanine and glutamate-phenylalanine interactions in the protein data bank: searching for anion-π pairs. Biochemistry 2011; 50:2939-50. [PMID: 21366334 DOI: 10.1021/bi200066k] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Protein structures are stabilized using noncovalent interactions. In addition to the traditional noncovalent interactions, newer types of interactions are thought to be present in proteins. One such interaction, an anion-π pair, in which the positively charged edge of an aromatic ring interacts with an anion, forming a favorable anion-quadrupole interaction, has been previously proposed [Jackson, M. R., et al. (2007) J. Phys. Chem. B111, 8242-8249]. To study the role of anion-π interactions in stabilizing protein structure, we analyzed pairwise interactions between phenylalanine (Phe) and the anionic amino acids, aspartate (Asp) and glutamate (Glu). Particular emphasis was focused on identification of Phe-Asp or -Glu pairs separated by less than 7 Å in the high-resolution, nonredundant Protein Data Bank. Simplifying Phe to benzene and Asp or Glu to formate molecules facilitated in silico analysis of the pairs. Kitaura-Morokuma energy calculations were performed on roughly 19000 benzene-formate pairs and the resulting energies analyzed as a function of distance and angle. Edgewise interactions typically produced strongly stabilizing interaction energies (-2 to -7.3 kcal/mol), while interactions involving the ring face resulted in weakly stabilizing to repulsive interaction energies. The strongest, most stabilizing interactions were identified as preferentially occurring in buried residues. Anion-π pairs are found throughout protein structures, in helices as well as β strands. Numerous pairs also had nearby cation-π interactions as well as potential π-π stacking. While more than 1000 structures did not contain an anion-π pair, the 3134 remaining structures contained approximately 2.6 anion-π pairs per protein, suggesting it is a reasonably common motif that could contribute to the overall structural stability of a protein.
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Affiliation(s)
- Vivek Philip
- Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, Knoxville, Tennessee 37996-0840, United States
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Cadman CJ, Croft AK. Anion-π interactions influence pK(a) values. Beilstein J Org Chem 2011; 7:320-8. [PMID: 21512592 PMCID: PMC3079108 DOI: 10.3762/bjoc.7.42] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Accepted: 02/23/2011] [Indexed: 11/23/2022] Open
Abstract
Five 8-(4-R-phenyl)-1-naphthol derivatives were prepared by PdCl(2)-catalysed electrophilic aromatic substitution. The pK(a)' values for these 1,8-disubstituted arene naphthols have been measured in acetonitrile/water (R = NO(2), 8.42; R = Cl, 8.52; R = H, 8.56; R = Me 8.68; and R = OMe, 8.71) and indicate a correlation with the electronic nature of the arene substituent, as determined through LFER analysis. Contributions to the relative pK(a)' values have been interpreted, using M06-2X DFT calculations, as consisting of two components: A small contribution from initial OH-π bonding in the starting materials and a larger contribution from anion-π interactions in the products. Such effects have implications for a range of other systems.
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Affiliation(s)
- Christopher J Cadman
- School of Chemistry, University of Wales Bangor, Bangor, Gwynedd, LL57 2UW, United Kingdom. Fax: +44 1248 370 528. Tel: +44 1248 382 375
| | - Anna K Croft
- School of Chemistry, University of Wales Bangor, Bangor, Gwynedd, LL57 2UW, United Kingdom. Fax: +44 1248 370 528. Tel: +44 1248 382 375
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Sánchez-Lozano M, Otero N, Hermida-Ramón JM, Estévez CM, Mandado M. Anion-π Aromatic Neutral Tweezers Complexes: Are They Stable in Polar Solvents? J Phys Chem A 2011; 115:2016-25. [DOI: 10.1021/jp1096647] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marta Sánchez-Lozano
- Departamento de Química Física, Facultade de Química, Universidade de Vigo, 36310 Vigo, Spain
| | - Nicolás Otero
- Departamento de Química Física, Facultade de Química, Universidade de Vigo, 36310 Vigo, Spain
| | - Jose M. Hermida-Ramón
- Departamento de Química Física, Facultade de Química, Universidade de Vigo, 36310 Vigo, Spain
| | - Carlos M. Estévez
- Departamento de Química Física, Facultade de Química, Universidade de Vigo, 36310 Vigo, Spain
| | - Marcos Mandado
- Departamento de Química Física, Facultade de Química, Universidade de Vigo, 36310 Vigo, Spain
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46
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Chen Y, Wang DX, Huang ZT, Wang MX. Ion pair receptors based on anion–π interaction. Chem Commun (Camb) 2011; 47:8112-4. [DOI: 10.1039/c1cc12075a] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Ortiz MI, Soriano ML, Carranza MP, Jalón FA, Steed JW, Mereiter K, Rodríguez AM, Quiñonero D, Deyà PM, Manzano BR. New [2 × 2] Copper(I) Grids as Anion Receptors. Effect of Ligand Functionalization on the Ability to Host Counteranions by Hydrogen Bonds. Inorg Chem 2010; 49:8828-47. [DOI: 10.1021/ic1009913] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M Isabel Ortiz
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, IRICA, Universidad de Castilla-La Mancha, Avenida Camilo José Cela 10, E-13071 Ciudad Real, Spain
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48
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Smith AMR, Rzepa HS, White AJP, Billen D, Hii KK(M. Delineating Origins of Stereocontrol in Asymmetric Pd-Catalyzed α-Hydroxylation of 1,3-Ketoesters. J Org Chem 2010; 75:3085-96. [DOI: 10.1021/jo1002906] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander M. R. Smith
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, United Kingdom
| | - Henry S. Rzepa
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, United Kingdom
| | - Andrew J. P. White
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, United Kingdom
| | - Denis Billen
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, United Kingdom
| | - King Kuok (Mimi) Hii
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, United Kingdom
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Carranza MP, Manzano BR, Jalón FA, Rodríguez AM, Santos L, Moreno M. First Examples of a Modulated Bridging μ2-1:2κN-Triazine in Double Helical Silver Compounds. Experimental and Theoretical Evidence. Inorg Chem 2010; 49:3828-35. [DOI: 10.1021/ic902563d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Pilar Carranza
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, IRICA
| | - Blanca R. Manzano
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, IRICA
| | - Félix A. Jalón
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, IRICA
| | - Ana M. Rodríguez
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Escuela Técnica Superior de Ingenieros Industriales
| | - Lucía Santos
- Departamento de Química-Física, Facultad de Químicas
| | - Miquel Moreno
- Departament de Química, Facultat de Ciències, Universitat Autónoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
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