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Frank N, Pryjomska-Ray I, Grubert L, Hecht S, Usvyat D, Limberg C. Binding of a TlCl Entity by a Tetragold Tetramercaptothiacalixarene Metalloligand via Metallophilic Interactions. Chemistry 2021; 27:8344-8349. [PMID: 33780048 PMCID: PMC8251583 DOI: 10.1002/chem.202100298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Indexed: 11/09/2022]
Abstract
The successive auration of p-tert-butyltetramercaptotetrathiacalix[4]arene, H4 (MTC[4]), with gold(I) phosphine units was investigated. Through deprotonation with NaOMe, followed by salt metathesis reactions with (PR3 )AuCl (R=Me, Ph) complexes with two and three [(PR3 )Au]+ moieties could be prepared and isolated, namely [(Ph3 PAu)2 H2 (MTC[4])] and [(Me3 PAu)3 H(MTC[4])]. In [(Me3 PAu)3 H(MTC[4])] two gold atoms already come close enough to undergo aurophilic interactions. To introduce a fourth [(PR3 )Au]+ entity TlOEt had to be used for the deprotonation, which led to the finding that four gold atoms organised by the (MTC[4])4- coordination platform are able to bind and stabilize a TlCl entity, yielding [(Me3 PAu)4 TlCl(MTC[4])]. As evidenced by structural and theoretical investigations the binding occurs through strong metallophilic interactions, which lead to photoluminescence at low temperatures.
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Affiliation(s)
- N Frank
- Department of Chemistry and IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor Straße 2, 12489, Berlin, Germany
| | - I Pryjomska-Ray
- Department of Chemistry and IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor Straße 2, 12489, Berlin, Germany
| | - L Grubert
- Department of Chemistry and IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor Straße 2, 12489, Berlin, Germany
| | - S Hecht
- Department of Chemistry and IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor Straße 2, 12489, Berlin, Germany
| | - D Usvyat
- Department of Chemistry and IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor Straße 2, 12489, Berlin, Germany
| | - C Limberg
- Department of Chemistry and IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor Straße 2, 12489, Berlin, Germany
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2
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Santoro O, Elsegood MRJ, Teat SJ, Yamato T, Redshaw C. Lithium calix[4]arenes: structural studies and use in the ring opening polymerization of cyclic esters. RSC Adv 2021; 11:11304-11317. [PMID: 35423659 PMCID: PMC8695813 DOI: 10.1039/d1ra00175b] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 03/08/2021] [Indexed: 01/07/2023] Open
Abstract
We have structurally characterized a number of lithiated calix[4]arenes, where the bridge in the calix[4]arene is thia (–S–, LSH4), sulfinyl (–SO–, LSOH4), sulfonyl (–SO2–, LSO2H4), dimethyleneoxa (–CH2OCH2–, LCOCH4) or methylene (–CH2–, LH4). In the case of L4SH4, interaction with LiOtBu led to the isolation of the complex [Li8(L4S)2(THF)4]·5THF (1·5THF), whilst similar interaction of L4SOH4 led to the isolation of [Li6(L4SOH)2(THF)2]·5(THF) (2·5THF). Interestingly, the mixed sulfinyl/sulfonyl complexes [Li8(calix[4]arene(SO)(SO2)(SO1.68)2)2(THF)6]·8(THF) (3·8THF) and [Li5Na(LSO/3SO2H)2(THF)5]·7.5(THF) (4·7.5(THF) have also been characterized. Interaction of LiOtBu with LSO2H4 and LCOCH4 afforded [Li5L4SO2(OH)(THF)4]·2THF (5·2THF) and [Li6(LCOC)2(HOtBu)2]·0.78THF·1.22hexane (6·0.78THF·1.22hexane), respectively. In the case of LH4, reaction with LiOtBu in THF afforded a monoclinic polymorph [LH2Li2(thf)(OH2)2]·3THF (7·3THF) of a known triclinic form of the complex, whilst reaction of the de-butylated analogue of LH4, namely de-BuLH4, afforded a polymeric chain structure {[Li5(de-BuL)(OH)(NCMe)3]·2MeCN}n (8·2MeCN). For comparative catalytic studies, the complex [Li6(LPr)2(H2O)2]·hexane (9 hexane), where LPr2H2 = 1,3-di-n-propyloxycalix[4]areneH2, was also prepared. The molecular crystal structures of 1–9 are reported, and their ability to act as catalysts for the ring opening (co-)/polymerization (ROP) of the cyclic esters ε-caprolactone, δ-valerolactone, and rac-lactide has been investigated. In most of the cases, complex 6 outperformed the other systems, allowing for higher conversions and/or greated polymer Mn. Novel Li-calix[n]arene complexes (n = 3, 4) having (–S–), (–SO–), (–SO2–), (–CH2OCH2–) or (–CH2–) bridges have been synthesized and fully characterized. Their catalytic activity in the ring opening polymerization of lactones has been studied.![]()
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Affiliation(s)
- Orlando Santoro
- Plastics Collaboratory
- Department of Chemistry
- University of Hull
- Hull
- UK
| | | | - Simon J. Teat
- Advanced Light Source
- Berkeley National Laboratory
- Berkeley
- USA
| | - Takehiko Yamato
- Department of Applied Chemistry
- Faculty of Science and Engineering
- Saga University
- Saga-shi
- Japan
| | - Carl Redshaw
- Plastics Collaboratory
- Department of Chemistry
- University of Hull
- Hull
- UK
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3
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Santoro O, Elsegood MRJ, Bedwell EV, Pryce JA, Redshaw C. INSIGHTS into the structures adopted by titanocalix[6 and 8]arenes and their use in the ring opening polymerization of cyclic esters. Dalton Trans 2020; 49:11978-11996. [PMID: 32812994 DOI: 10.1039/d0dt02130j] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Interaction of p-tert-butylcalix[6]areneH6, L1H6, with [TiCl4] afforded the complex [Ti2Cl3(MeCN)2(OH2)(L1H)][Ti2Cl3(MeCN)3(L1H)]·4.5MeCN (1·4.5MeCN), in which two pseudo-octahedral titanium centres are bound to one calix[6]arene. A similar reaction but employing THF resulted in the THF ring-opened product [Ti4Cl2(μ3-O)2(NCMe)2(L)2(O(CH2)4Cl)2]·4MeCN (2·4MeCN), where LH4 = p-tert-butylcalix[4]areneH4. Interaction of L1H6 with [TiF4] (3 equiv.) led, after work-up, to the complex [(TiF)2(μ-F)L1H]2·6.5MeCN (3·6.5MeCN). Treatment of p-tert-butylcalix[8]areneH8, L2H8, with [TiCl4] led to the isolation of the complex [(TiCl)2(TiClNCMe)2(μ3-O)2(L2)]·1.5MeCN (4·1.5MeCN). From a similar reaction, a co-crystallized complex [Ti4O2Cl4(MeCN)2(L2)][Ti3Cl6(MeCN)5(OH2)(L2H2)]·H2O·11MeCN (5·H2O 11MeCN) was isolated. Extension of the L2H8 chemistry to [TiBr4] afforded, depending on the stoichiometry, the complexes [(TiBr)2(TiBrNCMe)2(μ3-O)2(L2)]·6MeCN (6·6MeCN) or [[Ti(NCMe)2Br]2[Ti(O)Br2(NCMe)](L2)]·7.5MeCN (7·7.5MeCN), whilst use of [TiF4] afforded complexes containing Ca2+ and Na+, thought to originate from drying agents, namely [Ti8CaF20(OH2)Na2(MeCN)4(L2)2]·14MeCN (8·14MeCN), [Na(MeCN)2][Ti8CaF20NaO16(L2)2]·7MeCN (9·7MeCN) or [Na]6[Ti8F20Na(MeCN)2(L2)][Ti8F20Na(MeCN)0.5(L2)]·15.5(C2H3N) (10·15.5MeCN). In the case of [TiI4], the ladder [(TiI)2(TiINCMe)2(μ3-O)2(L2)]·7.25CH2Cl2 (11·7.25CH2Cl2) was isolated. These complexes have been screened for their potential to act as catalysts in the ring opening polymerization (ROP) of ε-caprolactone (ε-CL), δ-valerolactone (δ-VL) and rac-lactide (r-LA), both in air and N2. For ε-CL and δ-VL, moderate activity at 130 °C over 24 h was observed for 1, 9 and 11; for r-LA, only 1 exhibited reasonable activity. In the case of the co-polymerization of ε-CL with δ-VL, the complexes 1 and 11 afforded reasonable conversions and low molecular weight polymers, whilst 4, 6, and 9 were less effective. None of the complexes proved to be active in the co-polymerization of ε-CL and r-LA under the conditions employed herein.
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Affiliation(s)
- Orlando Santoro
- Plastics Collaboratory, Department of Chemistry and Biochemistry, The University of Hull, Cottingham Road, Hull, HU6 7RX, UK.
| | - Mark R J Elsegood
- Chemistry Department, Loughborough University, Loughborough, Leicestershire LE11 3TU, UK
| | - Elizabeth V Bedwell
- Chemistry Department, Loughborough University, Loughborough, Leicestershire LE11 3TU, UK
| | - Jake A Pryce
- Chemistry Department, Loughborough University, Loughborough, Leicestershire LE11 3TU, UK
| | - Carl Redshaw
- Plastics Collaboratory, Department of Chemistry and Biochemistry, The University of Hull, Cottingham Road, Hull, HU6 7RX, UK.
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4
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Keck M, Hoof S, Rawat V, Vigalok A, Limberg C. The Coordination Behavior of Oxygen‐depleted Calixarenes towards d
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Noble Metal Ions. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Matthias Keck
- Institut für Chemie Humboldt‐Universität zu Berlin Brook‐Taylor‐Str. 2 12489 Berlin Germany
| | - Santina Hoof
- Institut für Chemie Humboldt‐Universität zu Berlin Brook‐Taylor‐Str. 2 12489 Berlin Germany
| | - Varun Rawat
- School of Chemistry Tel Aviv University 1 Ramat Aviv 69978 Tel Aviv Israel
| | - Arkadi Vigalok
- School of Chemistry Tel Aviv University 1 Ramat Aviv 69978 Tel Aviv Israel
| | - Christian Limberg
- Institut für Chemie Humboldt‐Universität zu Berlin Brook‐Taylor‐Str. 2 12489 Berlin Germany
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5
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Mercaptothiacalixarenes Steer 24 Copper(I) Centers to form a Hollow‐Sphere Structure Featuring Cu
2
S
2
Motifs with Exceptionally Short Cu⋅⋅⋅Cu Distances. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915882] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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6
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Frank N, Dallmann A, Braun-Cula B, Herwig C, Limberg C. Mercaptothiacalixarenes Steer 24 Copper(I) Centers to form a Hollow-Sphere Structure Featuring Cu 2 S 2 Motifs with Exceptionally Short Cu⋅⋅⋅Cu Distances. Angew Chem Int Ed Engl 2020; 59:6735-6739. [PMID: 32009289 PMCID: PMC7187159 DOI: 10.1002/anie.201915882] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/30/2020] [Indexed: 12/18/2022]
Abstract
Tetramercaptotetrathiacalix[4]arene (LH4) can be used as a coordination platform to bind four CuI ions at the thiolate and thioether S atoms. Donor ligands such as phosphanes can stabilize the resulting [LCu4] units, which then remain monomeric ([(Ph3PCu)4L]). In the absence of donor ligands, they aggregate, providing a hexamer ([LCu4]6) in high yields, with a hollow‐sphere structure formed by an unprecedented Cu24S48 cage that is surrounded by the organic framework of the calixarene chalices. Preliminary NMR experiments with regard to the host‐guest chemistry in solution showed that the compound represents a polytopic host for acetonitrile and methane.
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Affiliation(s)
- Nicolas Frank
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - André Dallmann
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Beatrice Braun-Cula
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Christian Herwig
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Christian Limberg
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
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7
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Sinha AK, Vigalok A, Rawat V. Catalytic application of zinc complex of oxygen depleted 1,3-bis(pyrazole)-p-tert-butylcalix[4]arene. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.02.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Kielmann M, Senge MO. Molecular Engineering of Free-Base Porphyrins as Ligands-The N-H⋅⋅⋅X Binding Motif in Tetrapyrroles. Angew Chem Int Ed Engl 2019; 58:418-441. [PMID: 30067890 PMCID: PMC6391963 DOI: 10.1002/anie.201806281] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Indexed: 12/15/2022]
Abstract
The core N-H units of planar porphyrins are often inaccessible to forming hydrogen-bonding complexes with acceptor molecules. This is due to the fact that the amine moieties are "shielded" by the macrocyclic system, impeding the formation of intermolecular H-bonds. However, methods exist to modulate the tetrapyrrole conformations and to reshape the vector of N-H orientation outwards, thus increasing their availability and reactivity. Strategies include the use of porpho(di)methenes and phlorins (calixphyrins), as well as saddle-distorted porphyrins. The former form cavities due to interruption of the aromatic system. The latter are highly basic systems and capable of binding anions and neutral molecules via N-H⋅⋅⋅X-type H-bonds. This Review discusses the role of porphyrin(oid) ligands in various coordination-type complexes, means to access the core for hydrogen bonding, the concept of conformational control, and emerging applications, such as organocatalysis and sensors.
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Affiliation(s)
- Marc Kielmann
- School of ChemistrySFI Tetrapyrrole LaboratoryTrinity Biomedical Sciences InstituteTrinity College DublinThe University of Dublin152–160 Pearse StreetDublin 2Ireland
| | - Mathias O. Senge
- School of ChemistrySFI Tetrapyrrole LaboratoryTrinity Biomedical Sciences InstituteTrinity College DublinThe University of Dublin152–160 Pearse StreetDublin 2Ireland
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9
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Kielmann M, Senge MO. Molekulares Engineering freier Porphyrinbasen als Liganden - das N-H⋅⋅⋅X-Bindungsmotiv in Tetrapyrrolen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806281] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Marc Kielmann
- School of Chemistry; SFI Tetrapyrrole Laboratory; Trinity Biomedical Sciences Institute; Trinity College Dublin; The University of Dublin; 152-160 Pearse Street Dublin 2 Irland
| | - Mathias O. Senge
- School of Chemistry; SFI Tetrapyrrole Laboratory; Trinity Biomedical Sciences Institute; Trinity College Dublin; The University of Dublin; 152-160 Pearse Street Dublin 2 Irland
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10
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Flores-Jarillo M, González-Montiel S, Salazar-Pereda V, Mendoza-Espinosa D. Synthesis and characterization of monoanionic salts of p - tert -butylcalix[7]arene. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.03.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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Al-Harbi A, Hammond MJ, Parkin G. Organometallic Zirconium Compounds in an Oxygen-Rich Coordination Environment: Synthesis and Structural Characterization of Tris(oxoimidazolyl)hydroboratozirconium Compounds. Inorg Chem 2018; 57:1426-1437. [PMID: 29314851 DOI: 10.1021/acs.inorgchem.7b02832] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of tris(oxoimidazolyl)hydroborato ligands, which serve as L2X [O3] donors, have been employed to obtain organometallic zirconium compounds in an uncommon oxygen-rich coordination environment. For example, Cp[ToMeBenz]ZrCl2 has been synthesized via the reaction of [ToMeBenz]Na with CpZrCl3 and bears a structural resemblance to the bent metallocene dichloride derivative Cp2ZrCl2. In addition, the half-sandwich counterparts [ToMeBenz]ZrCl3 and [ToBut]ZrCl3 have been obtained by metathesis of ZrCl4 with [ToMeBenz]Na and [ToBut]Na, respectively. The structurally related zirconium benzyl compounds [ToRBenz]Zr(CH2Ph)3 (R = Me, But, 1-Ad) have also been synthesized via the reactions of [ToRBenz]Tl with Zr(CH2Ph)4, and X-ray diffraction studies demonstrate that the benzyl ligands in these compounds are conformationally flexible and exhibit a large range of Zr-CH2-Ph bond angles (94.7-131.7°). Protolytic cleavage of one of the benzyl ligands of [ToRBenz]Zr(CH2Ph)3 (R = But, 1-Ad) may be achieved by treatment with [PhNHMe2][B(C6F5)4] to generate {[ToRBenz]Zr(CH2Ph)2}[B(C6F5)4], which are catalysts for the polymerization of ethylene. The molecular structure of the ether adduct, {[ToButBenz]Zr(CH2Ph)2(OEt2)}[B(C6F5)4], has been determined by X-ray diffraction. In addition to the use of tris(oxoimidazolyl)hydroborato ligands, bis(oxoimidazolyl)hydroborato ligands have also been used to obtain zirconium benzyl compounds in oxygen-rich environments, namely, [BoMeBenz]2Zr(CH2Ph)2 and [BoAdBenz]2Zr(CH2Ph)2.
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Affiliation(s)
- Ahmed Al-Harbi
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Matthew J Hammond
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Gerard Parkin
- Department of Chemistry, Columbia University , New York, New York 10027, United States
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12
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Guillemot G, Matricardi E, Chamoreau LM, Thouvenot R, Proust A. Oxidovanadium(V) Anchored to Silanol-Functionalized Polyoxotungstates: Molecular Models for Single-Site Silica-Supported Vanadium Catalysts. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01878] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Geoffroy Guillemot
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 8232, Institut Parisien de Chimie Moléculaire Université Pierre et Marie Curie, 4 place Jussieu, case courrier 42, F-75252 Paris Cedex 05, France
| | - Edoardo Matricardi
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 8232, Institut Parisien de Chimie Moléculaire Université Pierre et Marie Curie, 4 place Jussieu, case courrier 42, F-75252 Paris Cedex 05, France
| | - Lise-Marie Chamoreau
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 8232, Institut Parisien de Chimie Moléculaire Université Pierre et Marie Curie, 4 place Jussieu, case courrier 42, F-75252 Paris Cedex 05, France
| | - René Thouvenot
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 8232, Institut Parisien de Chimie Moléculaire Université Pierre et Marie Curie, 4 place Jussieu, case courrier 42, F-75252 Paris Cedex 05, France
| | - Anna Proust
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 8232, Institut Parisien de Chimie Moléculaire Université Pierre et Marie Curie, 4 place Jussieu, case courrier 42, F-75252 Paris Cedex 05, France
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13
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Thornburg NE, Thompson AB, Notestein JM. Periodic Trends in Highly Dispersed Groups IV and V Supported Metal Oxide Catalysts for Alkene Epoxidation with H2O2. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01105] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Nicholas E. Thornburg
- Department of Chemical and
Biological Engineering, Technological Institute E136, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Anthony B. Thompson
- Department of Chemical and
Biological Engineering, Technological Institute E136, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Justin M. Notestein
- Department of Chemical and
Biological Engineering, Technological Institute E136, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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14
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Morris RS, Lavoie GG. Strong π-interactions between tantalum and apical ligands in square pyramidal complexes supported by a rigid tetradentate spectator ligand. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Rawat V, Press K, Goldberg I, Vigalok A. Straightforward synthesis and catalytic applications of rigid N,O-type calixarene ligands. Org Biomol Chem 2015; 13:11189-93. [PMID: 26478538 DOI: 10.1039/c5ob01987g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Here, we report a simple one-step access to new rigid N,O-calixarene ligands which is based on copper-catalized amination at the lower rim. We also present their main group and late transition metal complexes which show superior catalytic activity, in several organic transformations, compared with known metal calixarene complexes.
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Affiliation(s)
- Varun Rawat
- School of Chemistry
- The Raymond and Beverly Sackler Faculty of Exact Sciences
- Tel Aviv University
- Tel Aviv 69978
- Israel
| | - Konstantin Press
- School of Chemistry
- The Raymond and Beverly Sackler Faculty of Exact Sciences
- Tel Aviv University
- Tel Aviv 69978
- Israel
| | - Israel Goldberg
- School of Chemistry
- The Raymond and Beverly Sackler Faculty of Exact Sciences
- Tel Aviv University
- Tel Aviv 69978
- Israel
| | - Arkadi Vigalok
- School of Chemistry
- The Raymond and Beverly Sackler Faculty of Exact Sciences
- Tel Aviv University
- Tel Aviv 69978
- Israel
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16
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Visitaev Y, Goldberg I, Vigalok A. Organopalladium Complexes of Oxacalixarenes: Selecting the Lid for the Three-Dimensional Scaffold. Inorg Chem 2013; 52:6779-81. [DOI: 10.1021/ic400925y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Yulia Visitaev
- School of Chemistry, The Raymond
and Beverly Sackler
Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Israel Goldberg
- School of Chemistry, The Raymond
and Beverly Sackler
Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Arkadi Vigalok
- School of Chemistry, The Raymond
and Beverly Sackler
Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
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17
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Guillo P, Fasulo ME, Lipschutz MI, Tilley TD. Synthesis and characterization of tantalum silsesquioxane complexes. Dalton Trans 2013; 42:1991-5. [DOI: 10.1039/c2dt32601a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Structural aspects of the metal ion complexes of the conjugates of calix[4]arene: Crystal structures and computational models. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.09.001] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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19
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Molad A, Goldberg I, Vigalok A. Tubular Conjugated Polymer for Chemosensory Applications. J Am Chem Soc 2012; 134:7290-2. [DOI: 10.1021/ja301918f] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Anat Molad
- School of
Chemistry, The Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Israel Goldberg
- School of
Chemistry, The Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Arkadi Vigalok
- School of
Chemistry, The Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
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Bezuidenhout DI, Lotz S, Liles DC, van der Westhuizen B. Recent advances in the field of multicarbene and multimetal carbene complexes of the Fischer-type. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2011.12.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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21
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Ling I, Iyer KS, Bond CS, Sobolev AN, Alias Y, Raston CL. Sodium ion association via bridging water molecules for different charged p-phosphonated calix[4]arene bilayers. CrystEngComm 2012. [DOI: 10.1039/c2ce26207j] [Citation(s) in RCA: 3] [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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22
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Michel O, König S, Törnroos KW, Maichle-Mössmer C, Anwander R. Surface Organobarium and Organomagnesium Chemistry on Periodic Mesoporous Silica MCM-41: Convergent and Sequential Approaches Traced by Molecular Models. Chemistry 2011; 17:11857-67. [DOI: 10.1002/chem.201101756] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Indexed: 11/08/2022]
Affiliation(s)
- Olaf Michel
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
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Espinas J, Pelletier J, Jeanneau E, Darbost U, Szeto KC, Lucas C, Thivolle-Cazat J, Duchamp C, Henriques N, Bouchu D, Basset JM, Chermette H, Bonnamour I, Taoufik M. Synthesis of Novel Tantalacalixarene Complexes: First Example of Intramolecular CH Activation of Monodepleted Aromatic Ring. Organometallics 2011. [DOI: 10.1021/om200140u] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jeff Espinas
- Laboratoire de Chimie Organométallique de Surface, CNRS, UMR 5265 C2P2, Université Lyon 1, CPE Lyon, France
| | - Jérémie Pelletier
- Laboratoire de Chimie Organométallique de Surface, CNRS, UMR 5265 C2P2, Université Lyon 1, CPE Lyon, France
| | - Erwan Jeanneau
- Chimie Supramoléculaire Appliquée (CSAp)/ICBMS, CNRS, UMR 5246, Université Lyon 1, Villeurbanne, France
| | - Ulrich Darbost
- Chimie Supramoléculaire Appliquée (CSAp)/ICBMS, CNRS, UMR 5246, Université Lyon 1, Villeurbanne, France
| | - Kai C. Szeto
- Laboratoire de Chimie Organométallique de Surface, CNRS, UMR 5265 C2P2, Université Lyon 1, CPE Lyon, France
| | - Christine Lucas
- Laboratoire de Chimie Organométallique de Surface, CNRS, UMR 5265 C2P2, Université Lyon 1, CPE Lyon, France
| | - Jean Thivolle-Cazat
- Laboratoire de Chimie Organométallique de Surface, CNRS, UMR 5265 C2P2, Université Lyon 1, CPE Lyon, France
| | - Christian Duchamp
- Centre Commun de Spectrométrie de Masse/ICBMS CNRS, UMR 5246, Université Lyon 1, Villeurbanne, France
| | - Natali Henriques
- Centre Commun de Spectrométrie de Masse/ICBMS CNRS, UMR 5246, Université Lyon 1, Villeurbanne, France
| | - Denis Bouchu
- Centre Commun de Spectrométrie de Masse/ICBMS CNRS, UMR 5246, Université Lyon 1, Villeurbanne, France
| | - Jean-Marie Basset
- Laboratoire de Chimie Organométallique de Surface, CNRS, UMR 5265 C2P2, Université Lyon 1, CPE Lyon, France
| | - Henry Chermette
- Chimie Physique Théorique, UMR 5180, Laboratoire de Sciences Analytiques, Équipe CHEMOD, Université Lyon 1, Villeurbanne, France
| | - Isabelle Bonnamour
- Chimie Supramoléculaire Appliquée (CSAp)/ICBMS, CNRS, UMR 5246, Université Lyon 1, Villeurbanne, France
| | - Mostafa Taoufik
- Laboratoire de Chimie Organométallique de Surface, CNRS, UMR 5265 C2P2, Université Lyon 1, CPE Lyon, France
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24
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Bois J, Espinas J, Darbost U, Felix C, Duchamp C, Bouchu D, Taoufik M, Bonnamour I. Easy and selective method for the synthesis of various mono-O-functionalized calix[4]arenes: de-O-functionalization using TiCl4. J Org Chem 2010; 75:7550-8. [PMID: 20961084 DOI: 10.1021/jo101319s] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient and selective method for the monofunctionalization of p-tert-butylcalix[4]arene is described. A mono-de-O-functionalization of disubstituted p-tert-butylcalix[4]arenes using titanium tetrachloride was developed to synthesize a series of monosubstituted p-tert-butylcalix[4]arenes with the pendant functions being ethoxycarbonylmethyloxy, 3-ethoxycarbonylpropyloxy, cyanomethyloxy, 3-cyanopropyloxy, 4-bromobutyloxy, 3-hydroxypropyloxy, propyloxy, 2-methylpropyloxy, 3-butynyloxy, and 3-cyanopropyloxy groups. The reaction mechanism of the formation of 5,11,17,23-tetra-tert-butyl-26,27,28-trihydroxy-25-(3-ethoxycarbonylpropyloxy) calix[4]arene was studied by (1)H NMR and GC/mass spectroscopy monitoring. Reaction of TiCl4 with the disubstituted p-tert-butylcalix[4]arene produced the corresponding dioxocalix[4]arene titanium dichloride complex, which undergoes elimination of ethyl 4-chlorobutyrate, leading to a trioxocalix[4]arene titanium dichloride complex and to monosubstituted calix[4]arene after hydrolysis. These two complexes were also synthesized, isolated, and fully characterized.
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Affiliation(s)
- Joackim Bois
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Equipe CSAp, CNRS, UMR 5246, Université de Lyon, Lyon, Université Lyon 1, Villeurbanne, 43 Boulevard du 11 Novembre 1918, F-69622 Villeurbanne, France
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25
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Quadrelli EA, Basset JM. On silsesquioxanes’ accuracy as molecular models for silica-grafted complexes in heterogeneous catalysis. Coord Chem Rev 2010. [DOI: 10.1016/j.ccr.2009.09.031] [Citation(s) in RCA: 160] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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26
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Arbaoui A, Redshaw C, Elsegood MR, Wright V, Yoshizawa A, Yamato T. Iron(III) and Zinc(II) Calixarene Complexes: Synthesis, Structural Studies, and Use as Procatalysts for ε-Caprolactone Polymerization. Chem Asian J 2010; 5:621-33. [DOI: 10.1002/asia.200900514] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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27
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Mendoza-Espinosa D, Martinez-Ortega BA, Quiroz-Guzman M, Golen JA, Rheingold AL, Hanna TA. Synthesis, structures and full characterization of p-tert-butylcalix[5]arene mono-, di-, tri- and pentaanionic ligand precursors. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2008.12.065] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Fujita M, Lightbody OC, Ferguson MJ, McDonald R, Stryker JM. Quasi-Planar Homopolymetallic and Heteropolymetallic Coordination Arrays. Surface-Like Molecular Clusters of Magnesium and Aluminum. J Am Chem Soc 2009; 131:4568-9. [DOI: 10.1021/ja8093229] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Megumi Fujita
- Department of Chemistry, University of Alberta, Edmonton, Alberta Canada T6G 2G2
| | - Owen C. Lightbody
- Department of Chemistry, University of Alberta, Edmonton, Alberta Canada T6G 2G2
| | - Michael J. Ferguson
- Department of Chemistry, University of Alberta, Edmonton, Alberta Canada T6G 2G2
| | - Robert McDonald
- Department of Chemistry, University of Alberta, Edmonton, Alberta Canada T6G 2G2
| | - Jeffrey M. Stryker
- Department of Chemistry, University of Alberta, Edmonton, Alberta Canada T6G 2G2
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Buccella D, Parkin G. p-tert-Butyltetrathiatetramercaptocalix[4]arene as a sulfur-rich platform for molybdenum, tungsten and nickel. Chem Commun (Camb) 2009:289-91. [PMID: 19209305 DOI: 10.1039/b816066j] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
p-tert-Butyltetrathiatetramercaptocalix[4]arene, [S(4)Calix(Bu(t))(SH)(4)], reacts with Mo(PMe(3))(6), W(PMe(3))(4)(eta(2)-CH(2)PMe(2))H and Ni(PMe(3))(4) to yield molybdenum, tungsten and nickel compounds in a sulfur-rich coordination environment.
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Affiliation(s)
- Daniela Buccella
- Department of Chemistry, Columbia University, New York, NY 10027, USA
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30
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Mendoza-Espinosa D, Hanna TA. Synthesis, X-ray structures and reactivity of calix[5]arene bismuth(iii) and antimony(iii) complexes. Dalton Trans 2009:5211-25. [DOI: 10.1039/b903943k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Mendoza-Espinosa D, Rheingold AL, Hanna TA. Synthesis of bismuth and antimony complexes of the “larger” calix[n]arenes (n = 6–8); from mononuclear to tetranuclear complexes. Dalton Trans 2009:5226-38. [DOI: 10.1039/b903947c] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Chetcuti MJ, Devoille AMJ, Othman AB, Souane R, Thuéry P, Vicens J. Synthesis of mono-, di- and tetra-alkyne functionalized calix[4]arenes: Reactions of these multipodal ligands with dicobalt octacarbonyl to give complexes which contain up to eight cobalt atoms. Dalton Trans 2009:2999-3008. [DOI: 10.1039/b821144b] [Citation(s) in RCA: 18] [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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33
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Tzadka (Bukhaltsev) E, Goldberg I, Vigalok A. Entry to new N,O-ligands from oxygen-depleted calixarenes. Chem Commun (Camb) 2009:2041-3. [DOI: 10.1039/b816343j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Clulow AJ, Selby JD, Cushion MG, Schwarz AD, Mountford P. Synthesis, Structures and Reactivity of Group 4 Hydrazido Complexes Supported by Calix[4]arene Ligands. Inorg Chem 2008; 47:12049-62. [PMID: 18998672 DOI: 10.1021/ic801735c] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew J. Clulow
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Jonathan D. Selby
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Michael G. Cushion
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Andrew D. Schwarz
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Philip Mountford
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
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35
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Liu L, Zakharov LN, Golen JA, Rheingold AL, Hanna TA. Synthesis and Characterization of Bismuth(III) and Antimony(III) Calixarene Complexes. Inorg Chem 2008; 47:11143-53. [DOI: 10.1021/ic801445m] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lihua Liu
- Department of Chemistry, Texas Christian University, P.O. Box 298860, Fort Worth, Texas 76129, Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747, and Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, m/c 0358, La Jolla, California 92093-0358
| | - Lev N. Zakharov
- Department of Chemistry, Texas Christian University, P.O. Box 298860, Fort Worth, Texas 76129, Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747, and Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, m/c 0358, La Jolla, California 92093-0358
| | - James A. Golen
- Department of Chemistry, Texas Christian University, P.O. Box 298860, Fort Worth, Texas 76129, Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747, and Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, m/c 0358, La Jolla, California 92093-0358
| | - Arnold L. Rheingold
- Department of Chemistry, Texas Christian University, P.O. Box 298860, Fort Worth, Texas 76129, Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747, and Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, m/c 0358, La Jolla, California 92093-0358
| | - Tracy A. Hanna
- Department of Chemistry, Texas Christian University, P.O. Box 298860, Fort Worth, Texas 76129, Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747, and Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, m/c 0358, La Jolla, California 92093-0358
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Affiliation(s)
- Damien M. Homden
- Energy Materials Laboratory, School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
| | - Carl Redshaw
- Energy Materials Laboratory, School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
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Buccella D, Parkin G. Mononuclear and Dinuclear Molybdenum and Tungsten Complexes of p-tert-Butyltetrathiacalix[4]arene and p-tert-Butyltetrasulfonylcalix[4]arene: Facile Cleavage of the Calixarene Ligand Framework by Nickel. J Am Chem Soc 2008; 130:8617-9. [DOI: 10.1021/ja803215x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Daniela Buccella
- Department of Chemistry, Columbia University, New York, New York 10027
| | - Gerard Parkin
- Department of Chemistry, Columbia University, New York, New York 10027
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Redshaw C, Liu X, Zhan S, Hughes DL, Baillie-Johnson H, Elsegood MRJ, Dale SH. Rhenium Calix[4]arenes: Precursors to Novel Imaging and Cancer Therapy Agents. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800275] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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39
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Niobium- and Tantalum-Based Ethylene Polymerisation Catalysts Bearing Methylene- or Dimethyleneoxa-Bridged Calixarene Ligands. Chemistry 2007; 13:10129-39. [DOI: 10.1002/chem.200700893] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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40
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Hascall T, Pang K, Parkin G. exo and endo Isomerism of subvalent tin and germanium complexes derived from 1,3-diethers of p-tert-butylcalix[4]arene. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.06.127] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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41
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Ak MS, Deligöz H. Azocalixarenes. 6: Synthesis, complexation, extraction and thermal behaviour of four new azocalix[4]arenes. J INCL PHENOM MACRO 2007. [DOI: 10.1007/s10847-007-9300-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
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42
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Deligöz H, Özen Ö, Çilgi GK. Structural analysis of calix[n]arene-iron(III) complexes (n=4, 6, 8) and thermal decomposition of the parent calix[n]arenes. J COORD CHEM 2007. [DOI: 10.1080/00958970600784124] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Hasalettin Deligöz
- a Faculty of Science-Arts, Department of Chemistry , Pamukkale University , 20017, Denizli, Turkey
| | - Özlem Özen
- a Faculty of Science-Arts, Department of Chemistry , Pamukkale University , 20017, Denizli, Turkey
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Redshaw C, Rowan MA, Warford L, Homden DM, Arbaoui A, Elsegood MRJ, Dale SH, Yamato T, Casas CP, Matsui S, Matsuura S. Oxo- and Imidovanadium Complexes Incorporating Methylene- and Dimethyleneoxa-Bridged Calix[3]- and -[4]arenes: Synthesis, Structures and Ethylene Polymerisation Catalysis. Chemistry 2007; 13:1090-107. [PMID: 17115460 DOI: 10.1002/chem.200600679] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Reaction of [V(X)(OR)3] (X=O, Np-tolyl; R=Et, nPr or tBu) with p-tert-butylhexahomotrioxacalix[3]areneH3, LH3, affords the air-stable complexes [{V(X)L}n] (X=O, n=1 (1); X=Np-tolyl, n=2 (2)). Alternatively, 1 is readily available either from interaction of [V(mes)3THF] with LH3, and subsequent oxidation with O2 or upon reaction of LLi3 with [VOCl3]. Reaction of [V(Np-tolyl)(OtBu)3] with 1,3-dimethylether-p-tert-butylcalix[4]areneH2, Cax(OMe)2(OH)2, afforded [{VO(OtBu)}2(mu-O)Cax(OMe)2(O)2].2 MeCN (42 MeCN), in which two vanadium atoms are bound to just one calix[4]arene ligand; the n-propoxide analogue of 4, namely [{VO(OnPr)}2(mu-O)Cax(OMe)2(O)2].1.5 MeCN (51.5 MeCN), has also been isolated from a similar reaction using [V(O)(OnPr)3]. Reaction of [VOCl3], LiOtBu, (Me3Si)2O and Cax(OMe)2(OH)2 gave [{VO(OtBu)Cax(OMe)2(O)2}2Li4O2].8 MeCN (68 MeCN), in which an Li4O4 cube (two of the oxygen atoms are derived from the calixarene ligands) is sandwiched between two Cax(OMe)2(O)2. The reaction between [V(Np-tolyl)(OtBu)3] and Cax(OMe)2(OH)2, afforded [V(Np-tolyl)(OtBu)2Cax(OMe)2(O)(OH)]5 MeCN (75 MeCN), in which two tert-butoxide groups remain bound to the tetrahedral vanadium atom, which itself is bound to the calix[4]arene through only one phenolic oxygen atom. Reaction of p-tert-butylcalix[4]areneH4, Cax(OH)4 and [V(Np-tolyl)(OnPr)3] led to loss of the imido group and formation of the dimeric complex [{VCax(O)4(NCMe)}2].6 MeCN (86 MeCN). Monomeric vanadyl oxo- and imidocalix[4]arene complexes [V(X)Cax(O)3(OMe)(NCMe)] (X=O (11), Np-tolyl (12)) were obtained by the reaction of the methylether-p-tert-butylcalix[4]areneH3, Cax(OMe)(OH)3, and [V(X)(OR)3] (R=Et or nPr). Vanadyl calix[4]arene fragments can be linked by the reaction of 2,6-bis(bromomethyl)pyridine with Cax(OH)4 and subsequent treatment with [VOCl3] to afford the complex [{VOCax(O)4}2(mu-2,6-(CH2)2C5H3N)].4 MeCN (134 MeCN). The compounds 1-13 have been structurally characterised by single-crystal X-ray diffraction. Upon activation with methylaluminoxane, these complexes displayed poor activities, however, the use of dimethylaluminium chloride and the reactivator ethyltrichloroacetate generates highly active, thermally stable catalysts for the conversion of ethylene to, at 25 degrees C, ultra-high-molecular-weight (>5, 500,000), linear polyethylene, whilst at higher temperature (80 degrees C), the molecular weight of the polyethylene drops to about 450,000. Using 1 and 2 at 25 degrees C for ethylene/propylene co-polymerisation (50:50 feed) leads to ultra-high-molecular-weight (>2,900,000) polymer with about 14.5 mol% propylene incorporation. The catalytic systems employing the methyleneoxa-bridged complexes 1 and 2 are an order of magnitude more active than the bimetallic complexes 5 and 13, which, in turn, are an order of magnitude more active than pro-catalysts 8, 11 and 12. These differences in activity are discussed in terms of the structures of each class of complex.
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Affiliation(s)
- Carl Redshaw
- Wolfson Materials and Catalysis Centre, School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, NR4 7TJ, UK.
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Petit S, Pilet G, Luneau D, Chibotaru LF, Ungur L. A dinuclear cobalt(ii) complex of calix[8]arenes exibiting strong magnetic anisotropy. Dalton Trans 2007:4582-8. [DOI: 10.1039/b708926k] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Zapilko C, Widenmeyer M, Nagl I, Estler F, Anwander R, Raudaschl-Sieber G, Groeger O, Engelhardt G. Advanced Surface Functionalization of Periodic Mesoporous Silica: Kinetic Control by Trisilazane Reagents. J Am Chem Soc 2006; 128:16266-76. [PMID: 17165781 DOI: 10.1021/ja065444v] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The surface reactions of mesoporous silica MCM-41 with a series of new trisilylamines (trisilazanes) (SiHMe2)2NSiMe2R and (SiMe2Vin)2NSiMe2R (R = indenyl, norpinanyl, chloropropyl, 3-(N-morpholin)propyl; Vin = vinyl), disilylalkylamine (SiHMe2)iPrNSiMe2(CH2)3Cl, and monosilyldialkylamines Me2NSiMe2R (R = indenyl, chloropropyl, 3-(N-morpholin)propyl) were investigated. 1H, 13C, and 29Si MAS NMR spectroscopy, nitrogen adsorption/desorption, infrared spectroscopy, and model reactions with calix[4]arene as a mimic for an oxo surface were used to clarify the chemical nature of surface-bonded silyl groups. The trisilylamines exhibited a comparatively slow surface reaction, which allowed for the adjustment of the amount of silylated and nonreacted SiOH groups and led to a stoichiometric distribution of surface functionalities. The 2:1 integral ratio of SiHMe2 and SiMe2R moieties of such trisilazanes was found to be preserved on the silica surface as indicated by microanalytical as well as 13C and 29Si MAS NMR spectroscopic data of the hybrid materials. For example, the reaction of MCM-41 with (SiHMe2)2NSiMe2(CH2)3Cl, (SiHMe2)iPrNSiMe2(CH2)3Cl, and Me2NSiMe2(CH2)3Cl provided bi- and monofunctional hybrid materials with one-third, one-half, or all chemically accessible silanol groups derivatized by chloropropyl groups, respectively. Thus, a molecular precursor strategy was developed to efficiently control the relative amount of three different surface species, SiHMe2 (or SiVinMe2), SiMe2R, and SiOH, in a single reaction step. The reaction behavior of indenyl-substituted monosilazanes and trisilazanes (R = Ind) with calix[4]arene proved that the indenyl substituent can act as a leaving group forming a dimethylsilyl species, which is anchored bipodally on the silica surface, that is, via two Si-O bonds.
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Affiliation(s)
- Clemens Zapilko
- Kjemisk Institutt, Universitetet i Bergen, N-5007 Bergen, Allegatén 41, Norway
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Zeller J, Hewitt IJ, Radius U. Synthese, Charakterisierung und Magnetische Eigenschaften eines tetranuklearen, Thiacalix[4]aren-stabilisierten Mangankomplexes. Z Anorg Allg Chem 2006. [DOI: 10.1002/zaac.200600209] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
The alkali metal salts [TCALi4] (1), [TCANa4] (2), and [TCALK4] (3) of fully deprotonated p-tert-butyltetrathiacalix[4]arene (H(4)TCA) are readily available from the reactions of thiacalix[4]arene and n-BuLi, NaH, or KH as deprotonating reagents. Crystals of the sodium salts 2 and the potassium salt 3 suitable for X-ray diffraction were obtained in the form of the pyridine solvates [(TCA)2Na8.8py] (2.8py) and [(TCA)2K(8).8py] (3.8py). These molecules are dimers in the solid state but are structurally not related. In addition, the reaction of H(4)TCA and lithium hydroxide afforded the structurally characterized complex [(TCA)Li5(OH).4THF] (4). The molecular structure of 4 as well as the structures of 2.8py and 3.8py reveal a close relationship to the corresponding alkali metal salts of the calix[4]arenes.
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Affiliation(s)
- Jürgen Zeller
- Institut für Anorganische Chemie, Universität Karlsruhe, Engesserstrasse, Geb. 30.45, D-76131 Karlsruhe, Germany
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Notestein JM, Katz A. Enhancing Heterogeneous Catalysis through Cooperative Hybrid Organic–Inorganic Interfaces. Chemistry 2006; 12:3954-65. [PMID: 16502453 DOI: 10.1002/chem.200501152] [Citation(s) in RCA: 170] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Active-site/surface cooperativity can enhance heterogeneous organic and organometallic catalysis. We review the powerful role of the solid surface in this context for generating local acidity and, as an inner-sphere ligand, for stabilizing immobilized supramolecular assemblies and unsaturated organometallic complexes that are often unstable in solution.
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Affiliation(s)
- Justin M Notestein
- Department of Chemical Engineering, University of California at Berkeley, Berkeley California 94720-1462, USA
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