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Wang D, Malmberg R, Pernik I, Prasad SKK, Roemer M, Venkatesan K, Schmidt TW, Keaveney ST, Messerle BA. Development of tethered dual catalysts: synergy between photo- and transition metal catalysts for enhanced catalysis. Chem Sci 2020; 11:6256-6267. [PMID: 32953021 PMCID: PMC7480183 DOI: 10.1039/d0sc02703k] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 06/03/2020] [Indexed: 11/21/2022] Open
Abstract
While dual photocatalysis-transition metal catalysis strategies are extensively reported, the majority of systems feature two separate catalysts, limiting the potential for synergistic interactions between the catalytic centres. In this work we synthesised a series of tethered dual catalysts allowing us to investigate this underexplored area of dual catalysis. In particular, Ir(i) or Ir(iii) complexes were tethered to a BODIPY photocatalyst through different tethering modes. Extensive characterisation, including transient absorption spectroscopy, cyclic voltammetry and X-ray absorption spectroscopy, suggest that there are synergistic interactions between the catalysts. The tethered dual catalysts were more effective at promoting photocatalytic oxidation and Ir-catalysed dihydroalkoxylation, relative to the un-tethered species, highlighting that increases in both photocatalysis and Ir catalysis can be achieved. The potential of these catalysts was further demonstrated through novel sequential reactivity, and through switchable reactivity that is controlled by external stimuli (heat or light).
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Affiliation(s)
- Danfeng Wang
- Department of Molecular Sciences , Macquarie University , North Ryde , NSW 2109 , Australia . ;
| | - Robert Malmberg
- Department of Molecular Sciences , Macquarie University , North Ryde , NSW 2109 , Australia . ;
| | - Indrek Pernik
- Department of Molecular Sciences , Macquarie University , North Ryde , NSW 2109 , Australia . ;
| | - Shyamal K K Prasad
- ARC Centre of Excellence in Exciton Science , School of Chemistry , University of New South Wales , Kensington , NSW 2052 , Australia
| | - Max Roemer
- Department of Molecular Sciences , Macquarie University , North Ryde , NSW 2109 , Australia . ;
| | - Koushik Venkatesan
- Department of Molecular Sciences , Macquarie University , North Ryde , NSW 2109 , Australia . ;
| | - Timothy W Schmidt
- ARC Centre of Excellence in Exciton Science , School of Chemistry , University of New South Wales , Kensington , NSW 2052 , Australia
| | - Sinead T Keaveney
- Department of Molecular Sciences , Macquarie University , North Ryde , NSW 2109 , Australia . ;
| | - Barbara A Messerle
- Department of Molecular Sciences , Macquarie University , North Ryde , NSW 2109 , Australia . ;
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Bonfant G, Melegari M, Balestri D, Mezzadri F, Marzaroli V, Bassanetti I, Marchiò L. Supramolecular Assemblies in Silver Complexes: Phase Transitions and the Role of the Halogen Bond. Inorg Chem 2020; 59:4140-4149. [PMID: 32141298 DOI: 10.1021/acs.inorgchem.0c00256] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Weak interactions (hydrogen bonds, halogen bonds, CH···π and π-π stacking) can play a significant role in the formation of supramolecular assemblies with desired structural features. In this contribution, we report a systematic investigation on how a halogen bond (XB) can modulate the structural arrangement of silver supramolecular complexes. The complexes are composed of X-phenyl(bispyrazolyl)methane (X = Br, I) and I-alkynophenyl(bispyrazolyl)methane ligands functionalized in meta (L3Br, L3I) and para (L4Br, L4I, L4CCI) positions on a phenyl ring with the purpose of providing different directionalities of the X function with respect to the N,N coordination system. The obtained [Ag(L)2]+ moieties show remarkable geometric similarities, and the L4Br, L4I, and L4CCI ligands exhibit the most conserved types of supramolecular arrangement that are sustained by XB. The increased σ-hole in L4CCI with respect to L4I leads to an occurrence of short (and strong) XB interactions with the anions. [Ag(L4I)2]PF6 and [Ag(L4I)2]CF3SO3 are characterized by the presence of three different phases, and the single-crystal evolution from phase-1 (a honeycomb structure with large 1D cavities) to phase-3 (solventless) occurs by a stepwise decrease in the crystallization solvent content, which promotes an increase in XB interactions in the lattice. The present paper aims to provide useful tools for the selection of appropriate components for the use of coordination compounds to build supramolecular systems based on the halogen bond.
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Affiliation(s)
- Giulia Bonfant
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale (Chemistry Unit), Università di Parma, 43124 Parma, Italy
| | - Matteo Melegari
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale (Chemistry Unit), Università di Parma, 43124 Parma, Italy
| | - Davide Balestri
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale (Chemistry Unit), Università di Parma, 43124 Parma, Italy
| | - Francesco Mezzadri
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale (Chemistry Unit), Università di Parma, 43124 Parma, Italy
| | - Vittoria Marzaroli
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale (Chemistry Unit), Università di Parma, 43124 Parma, Italy
| | - Irene Bassanetti
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale (Chemistry Unit), Università di Parma, 43124 Parma, Italy
| | - Luciano Marchiò
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale (Chemistry Unit), Università di Parma, 43124 Parma, Italy
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Njogu EM, Omondi B, Nyamori VO. Review: Multimetallic silver(I)–pyridinyl complexes: coordination of silver(I) and luminescence. J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1070147] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Eric M. Njogu
- School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
| | - Bernard Omondi
- School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
| | - Vincent O. Nyamori
- School of Chemistry and Physics, University of KwaZulu-Natal, Durban, South Africa
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Gardinier JR, Hewage JS, Lindeman SV. Isomer Dependence in the Assembly and Lability of Silver(I) Trifluoromethanesulfonate Complexes of the Heteroditopic Ligands, 2-, 3-, and 4-[Di(1H-pyrazolyl)methyl]phenyl(di-p-tolyl)phosphine. Inorg Chem 2014; 53:12108-21. [DOI: 10.1021/ic5019357] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- James R. Gardinier
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201-1881, United States
| | - Jeewantha S. Hewage
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201-1881, United States
| | - Sergey V. Lindeman
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201-1881, United States
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Wang SC, Zhang YC, Jin F, Liu WD, Zhou HP, Wu JY, Tian YP. Synthesis, Crystal Structures, and Photoluminescent Properties of Bis(pyrazol-1-yl)methane Derivative and Zn(II) Halide Complexes (ZnLX2, X˭Cl, Br, I). ACTA ACUST UNITED AC 2014. [DOI: 10.1080/15533174.2013.841230] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Shi-Chao Wang
- Department of Chemistry, Anhui University and Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Hefei, P.R. China
| | - Yan-Can Zhang
- Department of Chemistry, Anhui University and Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Hefei, P.R. China
| | - Feng Jin
- Department of Chemistry, Anhui University and Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Hefei, P.R. China
| | - Wan-Ding Liu
- Department of Chemistry, Anhui University and Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Hefei, P.R. China
| | - Hong-Ping Zhou
- Department of Chemistry, Anhui University and Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Hefei, P.R. China
| | - Jie-Ying Wu
- Department of Chemistry, Anhui University and Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Hefei, P.R. China
| | - Yu-Peng Tian
- Department of Chemistry, Anhui University and Key Laboratory of Functional Inorganic Materials Chemistry of Anhui Province, Hefei, P.R. China
- State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, P.R. China
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Timerbulatova MG, Gatus MRD, Vuong KQ, Bhadbhade M, Algarra AG, Macgregor SA, Messerle BA. Bimetallic Complexes for Enhancing Catalyst Efficiency: Probing the Relationship between Activity and Intermetallic Distance. Organometallics 2013. [DOI: 10.1021/om4005059] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marina G. Timerbulatova
- School of Chemistry, University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Mark R. D. Gatus
- School of Chemistry, University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Khuong Q. Vuong
- School of Chemistry, University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Mohan Bhadbhade
- Mark Wainwright Analytical Centre, University of New South Wales, Kensington, New South Wales 2052, Australia
| | - Andrés G. Algarra
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
| | - Stuart A. Macgregor
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
| | - Barbara A. Messerle
- School of Chemistry, University of New South Wales, Kensington, New South Wales 2052, Australia
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7
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Sadhukhan N, Sarkar M, Ghatak T, Rahaman SMW, Barbour LJ, Bera JK. Reactions of acids with naphthyridine-functionalized ferrocenes: protonation and metal extrusion. Inorg Chem 2013; 52:1432-42. [PMID: 23347083 DOI: 10.1021/ic302155e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Reaction of 1,8-naphthyrid-2-yl-ferrocene (FcNP) with a variety of acids affords protonated salts at first, whereas longer reaction time leads to partial demetalation of FcNP resulting in a series of Fe complexes. The corresponding salts [FcNP·H][X] (X = BF(4) or CF(3)SO(3) (1)) are isolated for HBF(4) and CF(3)SO(3)H. Reaction of FcNP with equimolar amount of CF(3)CO(2)H for 12 h affords a neutral complex [Fe(FcNP)(2)(O(2)CCF(3))(2)(OH(2))(2)] (2). Use of excess acid gave a trinuclear Fe(II) complex [Fe(3)(H(2)O)(2)(O(2)CCF(3))(8)(FcNP·H)(2)] (3). Three linear iron atoms are held together by four bridging trifluoroacetates and two aqua ligands in a symmetric fashion. Reaction with ethereal solution of HCl afforded [(FcNP·H)(3)(Cl)][FeCl(4)](2) (4) irrespective of the amount of the acid used. Even the picric acid (HPic) led to metal extrusion giving rise to [Fe(2)(Cl)(2)(FcNP)(2)(Pic)(2)] (5) when crystallized from dichloromethane. Metal extrusion was also observed for CF(3)SO(3)H, but an analytically pure compound could not be isolated. The demetalation reaction proceeds with an initial proton attack to the distal nitrogen of the NP unit. Subsequently, coordination of the conjugate base to the electrophilic Fe facilitates the release of Cp rings from metal. The conjugate base plays an important role in the demetalation process and favors the isolation of the Fe complex as well. The 1,1'-bis(1,8-naphthyrid-2-yl)ferrocene (FcNP(2)) does not undergo demetalation under identical conditions. Two NP units share one positive charge causing the Fe-Cp bonds weakened to an extent that is not sufficient for demetalation. X-ray structure of the monoprotonated FcNP(2) reveals a discrete dimer [(FcNP(2)·H)](2)[OTf](2) (6) supported by two N-H···N hydrogen bonds. Crystal packing and dispersive forces associated with intra- and intermolecular π-π stacking interactions (NP···NP and Cp···NP) allow the formation of the dimer in the solid-state. The protonation and demetalation reactions of FcNP and FcNP(2) with a variety of acids are reported.
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Affiliation(s)
- Nabanita Sadhukhan
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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Pettinari C, Marchetti F, Orbisaglia S, Pettinari R, Ngoune J, Gómez M, Santos C, Álvarez E. Group 11 complexes with the bidentate di(1H-indazol-1-yl)methane and di(2H-indazol-2-yl)methane) ligands. CrystEngComm 2013. [DOI: 10.1039/c3ce40355f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Synthesis, structure and properties of one 2-D Ag(I) complex based on trinuclear silver(I) cluster and arene-linked bis(pyrazolyl)methane ligand. INORG CHEM COMMUN 2011. [DOI: 10.1016/j.inoche.2010.11.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Ho JHH, Wagler J, Willis AC, Messerle BA. Synthesis and structures of homo- and heterobimetallic rhodium(i) and/or iridium(i) complexes of binucleating bis(1-pyrazolyl)methane ligands. Dalton Trans 2011; 40:11031-42. [DOI: 10.1039/c1dt10499c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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12
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Horikoshi R, Mochida T. Ferrocene‐Containing Coordination Polymers: Ligand Design and Assembled Structures. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000525] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ryo Horikoshi
- Department of Energy & Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto‐Daigaku Katsura, Nishikyo‐ku, Kyoto 615‐8510, Japan
| | - Tomoyuki Mochida
- Department of Chemistry, Graduate School of Science, Kobe University, Rokkodai, Nada, Kobe, Hyogo 657‐8501, Japan
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13
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Pettinari C, Marinelli A, Marchetti F, Ngoune J, Galindo A, Álvarez E, Gómez M. Synthesis and Coordination Chemistry of Two N2-Donor Chelating Di(indazolyl)methane Ligands: Structural Characterization and Comparison of Their Metal Chelation Aptitudes. Inorg Chem 2010; 49:10543-56. [DOI: 10.1021/ic101577k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | | | - Agustín Galindo
- Departamento de Química Inorgánica, Universidad de Sevilla, Aptdo. 1203, 41071 Sevilla, Spain
| | - Eleuterio Álvarez
- Instituto de Investigaciones Químicas (IIQ), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avda. Américo Vespucio 49, Isla de La Cartuja, 41092 Sevilla, Spain
| | - Margarita Gómez
- Instituto de Investigaciones Químicas (IIQ), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Avda. Américo Vespucio 49, Isla de La Cartuja, 41092 Sevilla, Spain
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Quintal S, Concepción Gimeno M, Laguna A, Calhorda MJ. Silver(I) and copper(I) complexes with ferrocenyl ligands bearing imidazole or pyridyl substituents. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2009.11.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Sadhukhan N, Sinha A, Das RK, Bera JK. Multi-site coordination of ferrocenylamido-naphthyridine conjugates [{(5,7-dimethyl-1,8-naphthyridin-2-yl)amino}carbonyl]ferrocene and 1,1′-bis[{(5,7-dimethyl-1,8-naphthyridin-2-yl)amino}carbonyl]ferrocene. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2009.09.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Ehrhart J, Planeix JM, Kyritsakas-Gruber N, Hosseini MW. Molecular tectonics: formation and structural studies on a 2-D directional coordination network based on a non-centric metacyclophane based tecton and zinc cation. Dalton Trans 2010; 39:2137-46. [DOI: 10.1039/b917089h] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Chandrasekhar V, Thirumoorthi R. Coordination polymers containing ferrocene backbone. Synthesis, structure and electrochemistry. Dalton Trans 2010; 39:2684-91. [DOI: 10.1039/b922044e] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Wang S, Zang H, Sun C, Xu G, Wang X, Shao K, Lan Y, Su Z. Anion-directed genuine meso-helical supramolecular isomers of two 1D Ag(i) complexes based on arene-linked bis(pyrazolyl)methane ligands. CrystEngComm 2010. [DOI: 10.1039/c0ce00137f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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19
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Reger DL, Foley EA, Smith MD. Structural Impact of Multitopic Third-Generation Bis(1-pyrazolyl)methane Ligands: Double, Mononuclear Metallacyclic Silver(I) Complexes. Inorg Chem 2009; 49:234-42. [DOI: 10.1021/ic901899r] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel L. Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina
| | - Elizabeth A. Foley
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina
| | - Mark D. Smith
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina
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20
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Herrick RS, Franklin BR, Ziegler CJ, Çetin A. Synthesis of 1,1′-ferrocene bis(carboxypyrazole) compounds and displacement of the pyrazole ligands. INORG CHEM COMMUN 2009. [DOI: 10.1016/j.inoche.2009.09.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Marchetti F, Pettinari C, Cerquetella A, Cingolani A, Pettinari R, Monari M, Wanke R, Kuznetsov ML, Pombeiro AJL. Switching between κ2 and κ3 Bis(pyrazol-1-yl)acetate Ligands by Tuning Reaction Conditions: Synthesis, Spectral, Electrochemical, Structural, and Theoretical Studies on Arene-Ru(II) Derivatives of Bis(azol-1-yl)acetate Ligands. Inorg Chem 2009; 48:6096-108. [DOI: 10.1021/ic900463b] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fabio Marchetti
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Via S. Agostino 1, 62032 Camerino MC, Italy
| | - Claudio Pettinari
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Via S. Agostino 1, 62032 Camerino MC, Italy
| | - Adele Cerquetella
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Via S. Agostino 1, 62032 Camerino MC, Italy
| | - Augusto Cingolani
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Via S. Agostino 1, 62032 Camerino MC, Italy
| | - Riccardo Pettinari
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Via S. Agostino 1, 62032 Camerino MC, Italy
| | - Magda Monari
- Dipartimento di Chimica “G. Ciamician”, Università di Bologna, Via Selmi 2, I-40126 Bologna, Italy
| | - Riccardo Wanke
- Centro de Quìmica Estrutural, Complexo I, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Maxim L. Kuznetsov
- Centro de Quìmica Estrutural, Complexo I, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Armando J. L. Pombeiro
- Centro de Quìmica Estrutural, Complexo I, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
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22
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Ehrhart J, Planeix JM, Kyritsakas-Gruber N, Hosseini MW. Molecular tectonics: generation and structural studies on 1- and 2D coordination networks based on a meta-cyclophane in 1,3-alternate conformation bearing four pyrazolyl units and cobalt, zinc and copper cations. Dalton Trans 2009:6309-14. [DOI: 10.1039/b903674a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Sadhukhan N, Bera JK. Mixed-Metal Assemblies Involving Ferrocene−Naphthyridine Hybrids. Inorg Chem 2008; 48:978-90. [DOI: 10.1021/ic801586d] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nabanita Sadhukhan
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India
| | - Jitendra K. Bera
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India
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Tan W, Yu Z, He W, Wang L, Sun J, Chen J. A Toluene Guest in a Poly(heteronuclear) Complex Host of Ferrocenyl−(CH2)2-Bridged Bis(pyrazole). Organometallics 2008. [DOI: 10.1021/om800704a] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Weiqiang Tan
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, Peopleʼs Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, Peopleʼs Republic of China
| | - Zhengkun Yu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, Peopleʼs Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, Peopleʼs Republic of China
| | - Wei He
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, Peopleʼs Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, Peopleʼs Republic of China
| | - Liandi Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, Peopleʼs Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, Peopleʼs Republic of China
| | - Jie Sun
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, Peopleʼs Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, Peopleʼs Republic of China
| | - Jinzhu Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, Peopleʼs Republic of China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, Peopleʼs Republic of China
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25
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Morawitz T, Bolte M, Lerner HW, Wagner M. A Manganese(II) Coordination Polymer with Ditopic Bis(pyrazol-1-yl)borate Bridges. Z Anorg Allg Chem 2008. [DOI: 10.1002/zaac.200800107] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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26
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He C, Zhang B, Xie L, Liu Y, Duan C. Stereoselective association of ferrocene-contained molecular clips in coordination polymers. CrystEngComm 2008. [DOI: 10.1039/b719509e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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He C, Zhao Y, Guo D, Lin Z, Duan C. Chirality Transfer through Helical Motifs in Coordination Compounds. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200700360] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Cheng He
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, China
| | - Yonggang Zhao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, China
| | - Dong Guo
- School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, China
| | - Zhihua Lin
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, China
| | - Chunying Duan
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, China
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Reger DL, Watson RP, Smith MD. Synthesis of an anthracene-based bis(pyrazolyl)methane ligand and the structural characterization of its dinuclear tricarbonylrhenium(I) complex. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2007.03.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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29
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Cerquetella A, Effendy, Pettinari C, Pettinari R, Skelton BW, White AH. Synthesis and structural characterization of the adducts of silver(I) perchlorate and nitrate with triphenylphosphine and bis(pyrazolyl)methane ligands of 1:1:1 stoichiometry. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2006.11.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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Silva RM, Gwengo C, Lindeman SV, Smith MD, Gardinier JR. Janus Scorpionates: Supramolecular Tectons for the Directed Assembly of Hard−Soft Alkali Metallopolymer Chains. Inorg Chem 2006; 45:10998-1007. [PMID: 17173459 DOI: 10.1021/ic0615877] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new scorpionate ligand [HB(mtda)3-] containing mercaptothiadiazolyl (mtda) heterocyclic rings with both hard nitrogen donors and soft sulfur donors has been prepared. This new ligand, the Janus scorpionate, is a hybrid of a tris(pyrazolyl)borate and a tris(mercaptoimidazolyl)borate. The differential hard/soft character of the dissimilar donor groups in this bridging ligand was exploited for the controlled solid-state organization of homometallic and heterometallic alkali metal coordination polymers. Remarkably, in the case of sodium, coordination polymers with both acentric (with NaS3N3H kernels) and centric (with alternating NaN6 and NaS6H2 kernels) chains are found in the same crystal (where the centricity is defined by the relative orientations of the B-H bonds of the ligands along the lattice). For the homometallic potassium congener, the larger cation size, compared to sodium, induced significant distortions and favored a polar arrangement of ligands in the resulting coordination polymer chain. An examination of the solid-state structure of the mixed alkali metal salt system revealed that synergistic binding of smaller sodium cations to the nitrogen portion and of the larger potassium cations to the sulfur portion of the ligand minimizes the ligand distortions relative to the homometallic coordination polymer counterparts, a design feature of the ligand that likely assists in thermodynamically driving the self-assembly of the heterometallic chains. The effect of alkali metal complexation on the solution properties of the ligand was studied by comparing NMR chemical shifts, B-H stretching frequencies, and electrochemical properties with those of the noncoordinating tetrabutylammonium salt of the scorpionate. The similarity of these data regardless of cation indicates that the salts are likely dissociated in solution rather than maintaining their solid-state polymeric structures. This data is augmented by the ESI(+/-) mass spectral data for a series of mixed alkali metal tris(mercaptothiadiazolyl)borates that also indicate that dissociation occurs in solution.
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Affiliation(s)
- Rosalice M Silva
- Department of Chemistry, Marquette University, Milwaukee, WI 53201-1881, USA
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31
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Reger DL, Watson RP, Gardinier JR, Smith MD, Pellechia PJ. Metallacycles of Iron, Zinc, and Cadmium Assembled by Polytopic Bis(pyrazolyl)methane Ligands and Fluoride Abstraction from BF4-. Inorg Chem 2006; 45:10088-97. [PMID: 17140214 DOI: 10.1021/ic0613154] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reactions of the arene-linked bis(pyrazolyl)methane ligands m-bis[bis(1-pyrazolyl)methyl]benzene (m-[CH(pz)2]2C6H4, Lm) and 1,3,5-tris[bis(1-pyrazolyl)methyl]benzene (1,3,5-[CH(pz)2]3C6H3, L3) with BF4- salts of divalent iron, zinc, and cadmium result in fluoride abstraction from BF4- and formation of fluoride-bridged metallacyclic complexes. Treatment of Fe(BF4)2.6H2O and Zn(BF4)2.5H2O with Lm leads to the complexes [Fe2(mu-F)(mu-Lm)2](BF4)3 (1) and [Zn2(mu-F)(mu-Lm)2](BF4)3 (2), in which a single fluoride ligand and two Lm molecules bridge the two metal centers. The reaction of [Cd2(thf)5](BF4)4 with Lm results in the complex [Cd2(mu-F)2(mu-Lm)2](BF4)2 (3), which contains dimeric cations in which two fluoride and two Lm ligands bridge the cadmium centers. Equimolar amounts of the tritopic ligand L3 and Zn(BF4)2.5H2O react to give the related monofluoride-bridged complex [Zn2(mu-F)(mu-L3)2](BF4)3 (4), in which one bis(pyrazolyl)methane unit on each ligand remains unbound. NMR spectroscopic studies show that in acetonitrile the zinc metallacycles observed in the solid-state remain intact in solution.
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Affiliation(s)
- Daniel L Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA.
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32
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Reger DL, Watson RP, Smith MD. Silver(I) Complexes of Fixed, Polytopic Bis(pyrazolyl)methane Ligands: Influence of Ligand Geometry on the Formation of Discrete Metallacycles and Coordination Polymers. Inorg Chem 2006; 45:10077-87. [PMID: 17140213 DOI: 10.1021/ic0613053] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reactions of the arene-linked bis(pyrazolyl)methane ligands m-bis[bis(1-pyrazolyl)methyl]benzene, (m-[CH(pz)2]2C6H4, Lm), p-bis[bis(1-pyrazolyl)methyl]benzene, (p-[CH(pz)2]2C6H4, Lp), and 1,3,5-tris[bis(1-pyrazolyl)methyl]benzene (1,3,5-[CH(pz)2]3C6H3, L3) with AgX salts (pz = 1-pyrazolyl; X = BF4- or PF6-) yield two types of molecular motifs depending on the arrangement of the ligating sites about the central arene ring. Reactions of the m-phenylene-linked Lm with AgBF4 and AgPF6 afford complexes consisting of discrete, metallacyclic dications: [Ag2(mu-Lm)2](BF4)2 (1) and [Ag2(mu-Lm)2](PF6)2 (2). When the p-phenylene-linked Lp is treated with AgBF4 and AgPF6, acyclic, cationic coordination polymers are obtained: {[Ag(mu-Lp)]BF4}infinity (3) and {[Ag(mu-Lp)]PF6}infinity (4). Reaction of the ligand L3, containing three bis(pyrazolyl)methane units in a meta arrangement, with an equimolar amount of AgBF4 again yields discrete metallacyclic dications in which one bis(pyrazolyl)methane unit on each ligand remains unbound: [Ag2(mu-L3)2](BF4)2 (5). Treatment of L3 with an excess of AgBF4 affords a polymer of metallacycles, {[Ag3(mu-L3)2](BF4)3}infinity (6), with one of the bis(pyrazolyl)methane units on each ligand bound to a silver cation bridging two metallacycles. The supramolecular structures of the silver(I) complexes 1-6 are organized by noncovalent interactions, including weak hydrogen bonding, pi-pi, and anion-pi interactions.
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Affiliation(s)
- Daniel L Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA.
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33
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José Calhorda M, Costa PJ, Martinho PN, Concepción Gimeno M, Laguna A, Quintal S, Dolores Villacampa M. Synthesis and ligand properties towards gold and silver of the ferrocenylamidobenzimidazole ligand. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2006.06.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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Sadhukhan N, Patra SK, Sana K, Bera JK. Novel Heterobimetallic Metallamacrocycles Based on the 1,1‘-Bis(1,8-naphthyrid-2-yl)ferrocene (FcNP2) Ligand: Structural Characterization of the Complexes [{M(FcNP2)}2]2+ (M = CuI, AgI) and {MCl2(FcNP2)}4 (M = ZnII, CoII). Organometallics 2006. [DOI: 10.1021/om060252u] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nabanita Sadhukhan
- Department of Chemistry, Indian Institute of Technology, Kanpur, India 208016
| | - Sanjib K. Patra
- Department of Chemistry, Indian Institute of Technology, Kanpur, India 208016
| | - Kasinath Sana
- Department of Chemistry, Indian Institute of Technology, Kanpur, India 208016
| | - Jitendra K. Bera
- Department of Chemistry, Indian Institute of Technology, Kanpur, India 208016
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35
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José Calhorda M, Costa PJ, Crespo O, Gimeno MC, Jones PG, Laguna A, Naranjo M, Quintal S, Shi YJ, Villacampa MD. Group 11 complexes with the bis(3,5-dimethylpyrazol-1-yl)methane ligand. How secondary bonds can influence the coordination environment of Ag(i): the role of coordinated water in [Ag2(µ-L)2(OH2)2](OTf)2. Dalton Trans 2006:4104-13. [PMID: 16924288 DOI: 10.1039/b605034d] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The complexation properties of the ligand bis(3,5-dimethylpyrazol-1-yl)methane (L) towards group 11 metals have been studied. The reaction in a 1 : 1 molar ratio with [Cu(NCMe)4]PF6 or Ag(OTf) complexes gives the mononuclear [CuL(NCMe)]PF6 (1), with crystallographic mirror symmetry, or dinuclear [Ag2(mu-L)2](OTf)2 (2) (OTf = trifluoromethanesulfonate) in which the ligand bridges both silver centres, an unprecedented mode of coordination for this type of ligands. Compound 2 crystallizes with two water molecules and forms a supramolecular structure through classical hydrogen bonding. The reaction in a 2 : 1 ratio affords in both cases the four-coordinated derivatives [ML2]X (M = Cu, X = PF6 (3); Ag, X = OTf 4). The treatment of [Ag(OTf)(PPh3)] with the ligand L gives [AgL(PPh3)]OTf (5). The gold(I) derivative [Au2(C6F5)2(mu-L)] (6) has also been obtained by reaction of L with two equivalents of [Au(C6F5)(tht)]. These complexes present a luminescent behaviour at low temperature; the emissions being mainly intraligand but enhanced after coordination of the metal. Compounds 1-4 have been characterized by X-ray crystallography. DFT studies showed that, in the silver complex 2, coordination of H2O to Ag in the binuclear complex is favoured by formation of a hydrogen-bonding network, involving the triflato anion, and releasing enough energy to allow distortion of the Ag2 framework.
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Affiliation(s)
- Maria José Calhorda
- Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade de Lisboa, 1749-016, Lisboa, Portugal
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36
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Reger DL, Watson RP, Smith MD, Pellechia PJ. Controlling the Addition of Metal Centers to a Bis(pyrazolyl)methane Starburst Ligand: Direct Routes to Mono-, Bi-, and Trimetallic Rhenium(I) Complexes. Organometallics 2005. [DOI: 10.1021/om0508684] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel L. Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
| | - Russell P. Watson
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
| | - Mark D. Smith
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
| | - Perry J. Pellechia
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
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37
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Bieller S, Bolte M, Lerner HW, Wagner M. A Chloro-Bridged Dimanganese Complex and an Oxo-Bridged Dititanium Complex of a Ditopic Bis(pyrazol-1-yl)borate Ligand. Inorg Chem 2005; 44:9489-96. [PMID: 16323936 DOI: 10.1021/ic051689h] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis and crystal structure analysis of the ditopic p-phenylene-bridged bis(pyrazol-1-yl)borate [[p-C6H4(Bpz2tBu)2]Li2] (LLi2; pz=pyrazol-1-yl) is described. A salt metathesis reaction between LLi2 and MnCl2 in THF leads to the dinuclear complex [L[Mn(THF)]2(mu-Cl)2] featuring a central diamond MnII-(mu-Cl)2-MnII core (X-ray crystal structure analysis). Treatment of LLi2 with 2 equiv of [Ti(NMe2)3Cl] gives the dinuclear titanium compound [L[Ti(NMe2)3]2]. Upon reaction of LLi2 with [Ti(NMe2)2Cl2] and water, the mu-oxo-bridged dititanium species [L[Ti(NMe2)Cl]2(mu-O)] is obtained in excellent yield (X-ray crystal structure analysis).
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Affiliation(s)
- Susanne Bieller
- Institut für Anorganische Chemie, J. W. Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt (Main), Germany
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38
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Barranco EM, Gimeno MC, Laguna A, Villacampa MD. Gold and silver complexes with the ferrocenyl-pyrazolate ligand FcCH2pz. Inorganica Chim Acta 2005. [DOI: 10.1016/j.ica.2005.02.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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39
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Lidrissi C, Romerosa A, Saoud M, Serrano-Ruiz M, Gonsalvi L, Peruzzini M. Stable, Water-Soluble Pta-Based Ru–Ag Organometallic Polymers. Angew Chem Int Ed Engl 2005; 44:2568-72. [PMID: 15782373 DOI: 10.1002/anie.200462790] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chaker Lidrissi
- Area de Quimica Inorganica, Universidad de Almería, 04071 Almería, Spain
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40
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Lidrissi C, Romerosa A, Saoud M, Serrano-Ruiz M, Gonsalvi L, Peruzzini M. Stable, Water-Soluble Pta-Based Ru–Ag Organometallic Polymers. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200462790] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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41
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Reger DL, Brown KJ, Gardinier JR, Smith MD. Syntheses and structural characterizations of rhenium carbonyl complexes of a bitopic ferrocene-linked bis(pyrazolyl)methane ligand. J Organomet Chem 2005. [DOI: 10.1016/j.jorganchem.2004.10.048] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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42
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Synthesis and structural characterization of ferrocene-based bis(pyrazol-1-yl)borate ligands: FcB(Me)pz2K, Fc2Bpz2K, and 1,1′-fc[B(Me)pz2]2K2 (Fc: ferrocenyl, fc: ferrocenylene, pz: pyrazolyl). J Organomet Chem 2005. [DOI: 10.1016/j.jorganchem.2004.11.016] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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43
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44
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Liu YN, Orlowski G, Schatte G, Kraatz HB. 3-Ferrocenylamido-5-methylpyrazole: synthesis and metal coordination. Inorganica Chim Acta 2005. [DOI: 10.1016/j.ica.2004.11.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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45
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Reger DL, Watson RP, Smith MD, Pellechia PJ. Bitopic Phenylene-Linked Bis(pyrazolyl)methane Ligands: Preparation and Supramolecular Structures of Hetero- and Homobimetallic Complexes Incorporating Organoplatinum(II) and Tricarbonylrhenium(I) Centers. Organometallics 2005. [DOI: 10.1021/om049112f] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel L. Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
| | - Russell P. Watson
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
| | - Mark D. Smith
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
| | - Perry J. Pellechia
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208
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46
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Reger DL, Gardinier JR, Gemmill WR, Smith MD, Shahin AM, Long GJ, Rebbouh L, Grandjean F. Formation of Third Generation Poly(pyrazolyl)borate Ligands from Alkyne Coupling Reactions of Fe[(p-IC6H4)B(3-Rpz)3]2 (R = H, Me; pz = Pyrazolyl): Pathways toward Controlling an Iron(II) Electronic Spin-State Crossover. J Am Chem Soc 2005; 127:2303-16. [PMID: 15713110 DOI: 10.1021/ja044900h] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Sonogashira coupling reactions of terminal alkynes with Fe[(p-IC6H4)B(3-Mepz)3]2 (pz = pyrazolyl ring) yield Fe[(p-PhC2C6H4)B(3-Mepz)3]2 (2), Fe[(p-Me3SiC2C6H4)B(3-Rpz)3]2 (R = H, 3a, R = Me, 3b), and Fe[(p-HC2C6H4)B(3-Mepz)3]2 (R = H, 4a, R = Me, 4b), a series of new complexes containing "third generation" poly(pyrazolyl)borate ligands. Complex 2 undergoes a fairly gradual iron(II) electronic spin-state crossover with a 30 K hysteresis, whereas complex 3b is an unusual example of a complex with equivalent iron(II) sites in the high-spin form that shows an abrupt 50% spin crossover. For complex 4b, 50% of the iron(II) sites undergo a gradual spin-state transition between 185 and 350 K with an activation energy of 1590 +/- 30 cm(-1) and a T(1/2) = 280 K and, for the remaining iron(II) sites, an abrupt cooperative spin-state crossover between 106 and 114 K. The crystal structures of 4b obtained for each of the three distinct electronic spin states reveal two crystallographically different iron(II) sites, and analysis of the molecular/supramolecular structures indicates that the difference in the degree of pyrazolyl ring tilting in the ligands between the two sites, rather than the strength of the intermolecular forces, play a prominent role in determining the temperature of the spin-state crossover.
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Affiliation(s)
- Daniel L Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA.
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47
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Reger DL, Gardinier JR, BakbakCurrent address: School of Ch S, Semeniuc RF, Bunz UHF, Smith MD. Multitopic third generation tris(pyrazolyl)methane ligands built on alkyne structural scaffolding: first preparation of mixed tris(pyrazolyl)methane/tris(pyrazolyl)borate ligands. NEW J CHEM 2005. [DOI: 10.1039/b414770g] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Reger DL, Watson RP, Gardinier JR, Smith MD. Impact of Variations in Design of Flexible Bitopic Bis(pyrazolyl)methane Ligands and Counterions on the Structures of Silver(I) Complexes: Dominance of Cyclic Dimeric Architecture. Inorg Chem 2004; 43:6609-19. [PMID: 15476358 DOI: 10.1021/ic0491377] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The new ligands 1,1,4,4-tetra(1-pyrazolyl)butane [CH(pz)(2)(CH(2))(2)CH(pz)(2), L2] and 1,1,5,5-tetra(1-pyrazolyl)pentane [CH(pz)(2)(CH(2))(3)CH(pz)(2), L3] have been prepared to determine the structural changes in silver(I) complexes, if any, that accompany the lengthening of the spacer group between two linked bis(pyrazolyl)methane units. Silver(I) complexes of both ligands with BF(4)(-) and SO(3)CF(3)(-) as the counterion have the formula [Ag(2)(micro-L)(2)](counterion)(2). These complexes have a cyclic dimeric structure in the solid state previously observed with the shorter linked ligand CH(pz)(2)CH(2)CH(pz)(2). Similar chemistry starting with AgNO(3) for L2 yields a complex of the empirical formula [Ag(2)[micro-CH(pz)(2)(CH(2))(2)CH(pz)(2)](3)](NO(3))(2) that retains the cyclic dimeric structure, but bonding of an additional ligand creates a coordination polymer of the cyclic dimers. In contrast, coordination of the nitrate counterion to silver in the complex of L3 leads to the formation of the coordination polymer of the empirical formula [Ag(micro-CH(pz)(2)(CH(2))(3)CH(pz)(2))]NO(3). All six new complexes have extended supramolecular structures based on noncovalent interactions supported by the counterions and the functional groups designed into the ligands.
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Affiliation(s)
- Daniel L Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
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49
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Reger DL, Gardinier JR, Smith MD. Tuning the Coordination Geometry of Silver in Bis(pyrazolyl)alkane Complexes. Inorg Chem 2004; 43:3825-32. [PMID: 15206862 DOI: 10.1021/ic0497174] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Silver(I) complexes of the bis(pyrazolyl)methane ligands Ph(2)C(pz)(2), PhCH(pz)(2), and PhCH(2)CH(pz)(2) (pz = pyrazolyl ring) have been prepared in an attempt to explore how sterically hindered poly(pyrazolyl)methane ligands influence the variable coordination geometries exhibited by silver(I) complexes, especially its ability to participate in cation...pi interactions. The complex (Ag[(pz)(2)CPh(2)](2))(PF(6)).C(3)H(6)O adopts an unusual square planar coordination environment as indicated by the sum of the four N-Ag-N angles being 360 degrees. The proximity of phenyl groups above and below the AgN(4) core enforces the unusual coordination geometry about the metal center. This arrangement is not a result of silver(I)...pi arene interactions but rather of the constraints imposed by the steric crowding caused by (aryl)(2)C(pz)(2) ligands. In contrast, the complexes of the other two ligands, (Ag[(pz)(2)CHPh](2))(PF(6)).0.5CH(2)Cl(2) and (Ag[(pz)(2)CH(CH(2)Ph)](2))(PF(6)).CH(2)Cl(2), show normal tetrahedral geometry about the silver(I), also with no indication of silver(I)...pi arene interactions. All three new complexes have extended supramolecular structures supported by a combination of CH...pi and CH...F interactions.
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Affiliation(s)
- Daniel L Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, USA
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50
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Bieller S, Zhang F, Bolte M, Bats JW, Lerner HW, Wagner M. Bitopic Bis- and Tris(1-pyrazolyl)borate Ligands: Syntheses and Structural Characterization. Organometallics 2004. [DOI: 10.1021/om049954e] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Susanne Bieller
- Institut für Anorganische Chemie, J.W. Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt (Main), Germany, and Institut für Organische Chemie, J.W. Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt (Main), Germany
| | - Fan Zhang
- Institut für Anorganische Chemie, J.W. Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt (Main), Germany, and Institut für Organische Chemie, J.W. Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt (Main), Germany
| | - Michael Bolte
- Institut für Anorganische Chemie, J.W. Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt (Main), Germany, and Institut für Organische Chemie, J.W. Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt (Main), Germany
| | - Jan W. Bats
- Institut für Anorganische Chemie, J.W. Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt (Main), Germany, and Institut für Organische Chemie, J.W. Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt (Main), Germany
| | - Hans-Wolfram Lerner
- Institut für Anorganische Chemie, J.W. Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt (Main), Germany, and Institut für Organische Chemie, J.W. Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt (Main), Germany
| | - Matthias Wagner
- Institut für Anorganische Chemie, J.W. Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt (Main), Germany, and Institut für Organische Chemie, J.W. Goethe-Universität Frankfurt, Marie-Curie-Strasse 11, D-60439 Frankfurt (Main), Germany
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