Dr Anthony Haynes
School of Mathematical and Physical Sciences
Reader in Inorganic Chemistry
+44 114 222 9326
Full contact details
School of Mathematical and Physical Sciences
Dainton Building
13 Brook Hill
ºù«Ӱҵ
S3 7HF
- Profile
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Dr. Haynes obtained his BSc from the University of Exeter in 1986. After obtaining his PhD from the University of Nottingham in 1989, he became a BP Chemicals Research Fellow at the University of ºù«Ӱҵ until 1993, when he was appointed the BP Chemicals Lecturer in Homogeneous Catalysis.
In 1998 he was appointed as Lecturer at the University of ºù«Ӱҵ. From this post he was promoted to Senior Lecturer (2002) and Reader (2009).
- Qualifications
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- MRSC
- CChem
- Research interests
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The Haynes group investigates mechanistic aspects of homogeneous transition metal catalysed reactions, particularly industrially important processes such as methanol carbonylation and alkene hydroformylation. Synthetic, spectroscopic, kinetic and computational methods are used to study the structure and reactivity of organometallic complexes and their roles in catalysis.
Mechanisms of rhodium and iridium catalysed methanol carbonylation
The catalytic carbonylation of methanol to acetic acid is one of the most significant industrial applications of homogeneous transition metal catalysis. We have a long-standing research collaboration with BP Chemicals, who operate methanol carbonylation plants worldwide, and introduced a new process(Cativa TM) in 1995 that uses a promoted iridium/iodide catalyst. Highlights of our mechanistic studies include the first spectroscopic detection of a highly reactive Rh-methyl intermediate in the rhodium-catalysed process[1] and elucidation of the role of promoters in the iridium-based system.[2] We recently showed that the rate of migratory CO insertion in [Ir(CO)2I3Me]- is dramatically increased by isomerisation to place a CO ligand trans to methyl.[3]
Ligand effects on oxidative addition and migratory CO insertion
We are interested in how the rates of key steps in catalytic cycles can be influenced by the electronic and steric properties of "spectator" ligands, e.g. phosphines, imines and N-heterocyclic carbenes. Strongly donating ligands tend to promote oxidative addition and retard migratory CO insertion, whereas sterically bulky ligands tend to have the opposite effects on these steps.[4] In a recent study of the mechanism of rhodium/xantphos-catalysed methanol carbonylation it was found that the key intermediates contained xantphos coordinated as a tridentate "pincer" ligand and the nucleophilicity of the metal centre is enhanced by a Rh---O interaction.[5]
Computational studies
Our experimental studies are complimented by theoretical calculations, carried out in collaboration with Dr. Anthony Meijer in this department. We are interested in modelling trends in organometallic reactivity and spectroscopic properties, e.g. vibrational spectra of metal carbonyl complexes.
Facilities
The department is well-equipped with modern instrumentation for NMR spectroscopy, X-ray crystallography, mass-spectrometry and chromatography. In addition, the group has dedicated FTIR instruments for kinetic measurements, including high pressure and stopped-flow IR cells.
References
1. (a) JACS, 1991, 113, 8567; (b) JACS, 1993, 115, 4093.
2. JACS, 2004, 126, 2847.
3. Inorg. Chem., 2009, 48, 28
4. (a) JACS, 2002, 124, 13597; (b) Organometallics, 2003, 22, 1047; (c) Organometallics, 2003, 22, 4451.
5. Organometallics, 2011, 30, 6166.
- Publications
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Journal articles
- . Chemical communications (Cambridge, England), 58(80), 11252-11255.
- . Catalysis Science and Technology, 12(2), 664-673.
- . Faraday Discussions, 220, 282-316.
- . Faraday Discussions, 220, 144-178.
- . Angewandte Chemie, 130(17), 4622-4627.
- . Angewandte Chemie - International Edition, 57(17), 4532-4537.
- . Dalton Transactions, 46, 2821-2828.
- . Chem. Sci., 7(3), 2037-2050.
- . Dalton Transactions, 42(47), 16538-16546.
- . ACS Catalysis, 2(12), 2512-2523.
- . Organometallics, 30(22), 6166-6179.
- . European Journal of Inorganic Chemistry(23), 3511-3522.
- . Inorganic Chemistry Communications, 12(10), 1071-1073.
- . Inorg Chem, 48(1), 28-35.
- . Organometallics, 26(8), 1960-1965.
- . Organometallics, 26(3), 713-725.
- . Inorg Chem, 45(16), 6269-6275.
- . Dalton Transactions(1), 91-107.
- . Journal of Organometallic Chemistry, 690(24-25), 6089-6095.
- . Organometallics, 23(25), 5907-5909.
- . Dalton Trans(21), 3409-3419.
- . Journal of Physical Organic Chemistry, 17(11), 1007-1016.
- . Inorganica Chimica Acta, 357(10), 3027-3037.
- . J Am Chem Soc, 126(9), 2847-2861.
- . Organometallics, 23(5), 1015-1023.
- . Organometallics, 22(22), 4451-4458.
- . Catalysis Today, 81(3), 309-317.
- . Organometallics, 22(5), 1047-1054.
- . J Am Chem Soc, 124(45), 13597-13612.
- . Inorganic Chemistry, 41(12), 3280-3290.
- . J Chem Soc, Dalton Transactions(12), 2565-2572.
- . J Am Chem Soc, 123(41), 9984-10000.
- Two Metals are Better Than One. Education in Chemistry, 38(4), 99.
- . Inorganic Chemistry Communications, 3(1), 11-12.
- . J Am Chem Soc, 121(48), 11233-11234.
- . Chemical Communications(2), 179-180.
- . Chemical Communications(9), 1023-1024.
- . Inorganica Chimica Acta, 270(1-2), 382-391.
- . J Organomet Chem, 551(1-2), 339-347.
- . Chemical Communications(15), 1765-1766.
- . J Chem Soc Dalton Transactions(11), 2187-2196.
- . J Am Chem Soc, 118(12), 3029-3030.
- . Inorganica Chimica Acta, 240(1-2), 485-493.
- . J Chem Soc Chemical Communications(10), 1045-1046.
- . Organometallics, 13(8), 3215-3226.
- . J Am Chem Soc, 115(10), 4093-4100.
- Relative Reaction Rates for Rhodium and Iridium: Oxidative Addition of Methyl Iodide to M(I) and Migratory Insertion in M(III) Methyl Carbonyl Complexes. Gazzetta Chimica Italiana, 122(9), 391-393.
- Fe(CO)5 in CO cylinders. Chemistry in Britain, 28(6), 517-517.
- . J Am Chem Soc, 113(22), 8567-8569.
- . J Am Chem Soc, 113(6), 2011-2020.
- . J Organomet Chem, 383(1-3), 497-519.
- . J Mol Struct, 189(1-2), 153-164.
- . J Chem Soc Dalton Transactions(6), 1501-1507.
Chapters
- (pp. 333-362). Wiley
- , Contemporary Catalysis: Science, Technology, and Applications (pp. 793-822). The Royal Society of Chemistry
- In Reedijk J & Poeppelmeier K (Ed.), Comprehensive Inorganic Chemistry II: From Elements to Applications (pp. 1-24). Elsevier
- In Gates BC & Knözinger H (Ed.), Advances in Catalysis (pp. 1-45).
- In Crabtree RH & Mingos DMP (Ed.), Comprehensive Organometallic Chemistry III (pp. 427-444). Elsevier
- In Chiusoli GP & Maitlis PM (Ed.), Metal-catalysis in industrial organic processes (pp. 114-162). RSC
- In Beller M (Ed.), Catalytic Carbonylation Reactions (pp. 179-205).
- In Heaton B (Ed.), Mechanisms in Homogeneous Catalysis: A Spectroscopic Approach (pp. 107-150). Wiley VCH
- In Derouane EG, Parmon V, Lemos F & Ribeiro FR (Ed.), Principles and Methods for Accelerated Catalyst Design and Testing (pp. 299-303).
- In Sherrington DC & Kybett AP (Ed.), Supported Catalysts and their Applications (pp. 166-175).
- Chemical Marriage Brokers In Lister T (Ed.), Cutting edge chemistry (pp. 55-76). RSC
- Chemical Mariage Brokers In Hall N (Ed.), The Age of the Molecule (pp. 73-96). RSC
- , Selective Reactions of Metal-Activated Molecules (pp. 83-93).
Book reviews
Conference proceedings papers
- Steric and electronic effects in the rhodium-catalyzed carbonylation reactions. Abstr Pap Am Chem Soc, Vol. 224 (pp U734-U734)
- . Advances in Catalyst Design
- Os2(CO)8, an apparent intermediate in the olefin and acetylene exchange-reactions of diosmacyclobutanes. Abstr Pap Am Chem Soc, Vol. 198 (pp 329-INOR)
Patents
Preprints
- Teaching interests
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Transition Metal Chemistry; Homogeneous Catalysis
- Teaching activities
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Undergraduate and postgraduate taught modules
- Hydrogen and the s- and p-block elements (Level 1)
This segment introduces key concepts regarding the structures and properties of the s- and p-block elements. - Reactivity and mechanisms of d-block complexes (Level 2)
This course describes and explains the reaction mechanisms of transition metal complexes. - Organometallic Chemistry 1: longitudinal ligands (Level 3)
This segment deals with the synthesis, structure, bonding and reactivity of transition metal complexes containing metal-carbon σ-bonds. It introduces the role of these complexes in catalytic reactions. - Homogeneous Catalysis (Level 4)
This course describes the chemical basis behind some economically important industrial processes which use homogeneous transition metal catalysts to manufacture important products such as solvents, pharmaceuticals, polymers and detergents.
Support Teaching:
- Tutorials: Level 1 General Chemistry.
- Tutorials: Level 2 Inorganic Chemistry.
- Skills for Success: Database Project.
- Level 3 Literature Review
Laboratory Teaching:
- Level 4 Research Project
- Hydrogen and the s- and p-block elements (Level 1)