Imperial College London

Dr F. Mark Chadwick

Faculty of Natural SciencesDepartment of Chemistry

Imperial College Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 5872m.chadwick

 
 
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Location

 

601KMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Publication Type
Year
to

21 results found

Landman IR, Suleymanov AA, Fadaei-Tirani F, Scopelliti R, Chadwick FM, Severin Ket al., 2020, Bronsted and Lewis acid adducts of triazenes, DALTON TRANSACTIONS, Vol: 49, Pages: 2317-2322, ISSN: 1477-9226

Journal article

Tan J-F, Bormann CT, Perrin FG, Chadwick FM, Seyerin K, Cramer Net al., 2019, Divergent Synthesis of Densely Substituted Arenes and Pyridines via Cyclotrimerization Reactions of Alkynyl Triazenes, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 141, Pages: 10372-10383, ISSN: 0002-7863

Journal article

Chadwick FM, Curchod BFE, Scopelliti R, FadaeiTirani F, Solari E, Severin Ket al., 2019, Azo‐MICs: Redox‐Active Mesoionic Carbene Ligands Derived from Azoimidazolium Dyes, Angewandte Chemie, Vol: 131, Pages: 1778-1781, ISSN: 0044-8249

Journal article

Chadwick FM, Curchod BFE, Scopelliti R, Tirani FF, Solari E, Severin Ket al., 2019, Azo-MICs: Redox-Active Mesoionic Carbene Ligands Derived from Azoimidazolium Dyes, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, Vol: 58, Pages: 1764-1767, ISSN: 1433-7851

Journal article

Clement DD, Binding SC, Arnold TAQ, Chadwick FM, Casely IJ, Turner ZR, Buffet JC, O'Hare Det al., 2019, Synthesis and characterization of permethylpentalene titanium aryloxide and alkoxide complexes, Polyhedron, Vol: 157, Pages: 146-151, ISSN: 0277-5387

© 2018 Elsevier Ltd A series of titanium complexes containing the permethylpentalene ligand (C8Me62−; Pn∗) – Pn∗Ti(O-2,6-Me-C6H3)Cl (1), Pn∗Ti(O-2,4-tBu-C6H3)Cl (2), Pn∗Ti(OtBu)Cl (3), Pn∗Ti(O-2,6-Me-C6H3)2 (4), Pn∗Ti(OtBu)2 (5) – or the (hydro)permethylpentalene ligand (C8Me6H−; Pn∗(H)) – Pn∗(H)Ti(O-2,6-Me-C6H3)Cl2 (6) and Pn∗(H)Ti(O-2,6-Me2-C6H3)3 (7) – were prepared by the reaction of [Pn∗TiCl(μ-Cl)]2 with the corresponding potassium salt or alcohol. All complexes have been characterized by single crystal X-ray diffraction studies and NMR spectroscopy. The (hydro)permethylpentalene complexes contain a stereocenter and planar chirality which can be described as R,RP or S,SP configurations.

Journal article

Chadwick FM, McKay AI, Martinez-Martinez AJ, Rees NH, Kramer T, Macgregor SA, Weller ASet al., 2017, Solid-state molecular organometallic chemistry. Single-crystal to single-crystal reactivity and catalysis with light hydrocarbon substrates, CHEMICAL SCIENCE, Vol: 8, Pages: 6014-6029, ISSN: 2041-6520

Journal article

Chadwick FM, Kramer T, Gutmann T, Rees NH, Thompson AL, Edwards AJ, Buntkowsky G, Macgregor SA, Weller ASet al., 2016, Selective C-H Activation at a Molecular Rhodium Sigma-Alkane Complex by Solid/Gas Single-Crystal to Single-Crystal H/D Exchange, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 138, Pages: 13369-13378, ISSN: 0002-7863

Journal article

Chadwick FM, Olliff N, Weller AS, 2016, A convenient route to a norbornadiene adduct of iridium with chelating phosphines, [Ir(R2PCH2CH2PR2)(NBD)][BAr4F] and a comparison of reactivity with H-2 in solution and the solid state, JOURNAL OF ORGANOMETALLIC CHEMISTRY, Vol: 812, Pages: 268-271, ISSN: 0022-328X

Journal article

Chadwick FM, Cooper RT, O'Hare D, 2016, Zirconium and Hafnium Permethylpentalene Compounds, ORGANOMETALLICS, Vol: 35, Pages: 2092-2100, ISSN: 0276-7333

Journal article

Chadwick FM, Rees NH, Weller AS, Kraemer T, Iannuzzi M, Macgregor SAet al., 2016, A Rhodium-Pentane Sigma-Alkane Complex: Characterization in the Solid State by Experimental and Computational Techniques, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, Vol: 55, Pages: 3677-3681, ISSN: 1433-7851

Journal article

Grigoropoulos A, Whitehead GFS, Perret N, Katsoulidis AP, Chadwick FM, Davies RP, Haynes A, Brammer L, Weller AS, Xiao J, Rosseinsky MJet al., 2016, Encapsulation of an organometallic cationic catalyst by direct exchange into an anionic MOF, Chemical Science, Vol: 7, Pages: 2037-2050, ISSN: 2041-6539

Metal–Organic Frameworks (MOFs) are porous crystalline materials that have emerged as promising hosts for the heterogenization of homogeneous organometallic catalysts, forming hybrid materials which combine the benefits of both classes of catalysts. Herein, we report the encapsulation of the organometallic cationic Lewis acidic catalyst [CpFe(CO)2(L)]+ ([Fp–L]+, Cp = η5-C5H5, L = weakly bound solvent) inside the pores of the anionic [Et4N]3[In3(BTC)4] MOF (H3BTC = benzenetricarboxylic acid) via a direct one-step cation exchange process. To conclusively validate this methodology, initially [Cp2Co]+ was used as an inert spatial probe to (i) test the stability of the selected host; (ii) monitor the stoichiometry of the cation exchange process and (iii) assess pore dimensions, spatial location of the cationic species and guest-accessible space by single crystal X-ray crystallography. Subsequently, the quasi-isosteric [Fp–L]+ was encapsulated inside the pores via partial cation exchange to form [(Fp–L)0.6(Et4N)2.4][In3(BTC)4]. The latter was rigorously characterized and benchmarked as a heterogeneous catalyst in a simple Diels–Alder reaction, thus verifying the integrity and reactivity of the encapsulated molecular catalyst. These results provide a platform for the development of heterogeneous catalysts with chemically and spatially well-defined catalytic sites by direct exchange of cationic catalysts into anionic MOFs.

Journal article

Weller AS, Chadwick FM, McKay AI, 2016, Transition Metal Alkane-Sigma Complexes: Synthesis, Characterization, and Reactivity, Advances in Organometallic Chemistry, Pages: 223-276

© 2016 Elsevier Inc. Although transient and difficult to observe, well-defined σ-alkane complexes are now becoming established due to the developments in characterization techniques alongside synthetic methodologies that allow for their observation. Although the number of such complexes still remains relatively small compared to other σ-complexes, such as those with dihydrogen, their growing number and diversity promises much for the future in terms of the development of their fundamental structure and bonding and their role in selective C–H bond activation and functionalization. In this perspective review, the synthesis and characterization of σ-alkane complexes are presented, and the onward reactivity of relatively well-defined examples discussed, with the emphasis on recent results.

Book chapter

Adams GM, Chadwick FM, Pike SD, Weller ASet al., 2015, A CH2Cl2 complex of a [Rh(pincer)]+ cation, Dalton Transactions, Vol: 44, Pages: 6340-6342, ISSN: 1477-9226

The CH2Cl2 complex [Rh(tBuPONOP)(κ1-ClCH2Cl)][BArF4] is reported, that also acts as a useful synthon for other complexes such as N2, CO and H2 adducts; while the analogous PNP complex undergoes C–Cl activation.

Journal article

Chadwick FM, Ashley AE, Cooper RT, Bennett LA, Green JC, O'Hare DMet al., 2015, Group 9 bimetallic carbonyl permethylpentalene complexes, DALTON TRANSACTIONS, Vol: 44, Pages: 20147-20153, ISSN: 1477-9226

Journal article

Cooper RT, Chadwick FM, Ashley AE, O'Hare Det al., 2015, Double CO2 activation by 14-electron eta(8)-permethylpentalene titanium dialkyl complexes, CHEMICAL COMMUNICATIONS, Vol: 51, Pages: 11856-11859, ISSN: 1359-7345

Journal article

Pike SD, Chadwick FM, Rees NH, Scott MP, Weller AS, Krämer T, Macgregor SAet al., 2014, Solid-State Synthesis and Characterization of σ-Alkane Complexes, [Rh(L2)(η2,η2-C7H12)][BArF4] (L2 = Bidentate Chelating Phosphine), Journal of the American Chemical Society, Vol: 137, Pages: 820-833, ISSN: 0002-7863

Journal article

Chadwick FM, O'Hare DM, 2014, Half- and Mixed-Sandwich Uranium Permethylpentalene Compounds, ORGANOMETALLICS, Vol: 33, Pages: 3768-3774, ISSN: 0276-7333

Journal article

Chadwick FM, Cooper RT, Ashley AE, Buffet J-C, O'Hare DMet al., 2014, Early Transition Metal Permethylpentalene Complexes for the Polymerization of Ethylene, ORGANOMETALLICS, Vol: 33, Pages: 3775-3785, ISSN: 0276-7333

Journal article

Cooper RT, Chadwick FM, Ashley AE, O'Hare Det al., 2013, Synthesis and Characterization of Group 4 Permethylpentalene Dichloride Complexes, ORGANOMETALLICS, Vol: 32, Pages: 2228-2233, ISSN: 0276-7333

Journal article

Binding SC, Zaher H, Chadwick FM, O'Hare Det al., 2012, Heterolytic activation of hydrogen using frustrated Lewis pairs containing tris(2,2 ',2 ''-perfluorobiphenyl)borane, DALTON TRANSACTIONS, Vol: 41, Pages: 9061-9066, ISSN: 1477-9226

Journal article

Chadwick FM, Ashley A, Wildgoose G, Goicoechea JM, Randall S, O'Hare Det al., 2010, Bis(permethylpentalene)uranium., Dalton Trans., Vol: 39, Pages: 6789-6793, ISSN: 1477-9226

The reaction of Li2(C14H18)(TMEDA)x (C14H18 = permethylpentalene, Pn*) with UCl4 yields U(η8-C14H18)2, (UPn*2) an analog of CePn*2 and U{η8-C8H4(1,4-SiiPr3)2}2. The UPn*2 mol. is structurally characterized via a variety of techniques, its magnetism is probed in the soln. and solid phase and the redox properties were studied using cyclic voltammetry. UPn*2 is reducible and the reduced species reacted with N2 to form a stable complex. An analogous complex was not found under Ar. [on SciFinder(R)]

Journal article

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