Winter, Mark J. - University of Sheffield

个人简介

Prof Mark Winter obtained his BSc in Chemistry from the University of Bristol in 1975, followed by a PhD in Chemistry from the same institution in 1978 with Prof Selby Knox and Prof Gordon Stone. He was a SERC-NATO Postdoctoral Fellow working with Prof Peter Vollhardt at the University of California at Berkeley (USA) from 1978 to 1980. In 1980 he was appointed as a temporary lecturer at the University of Sheffield, where he is now the Director of Studies in the Department of Chemistry. Mark believes firmly that molybdenum is the best element in the periodic table and that he doesn't play enough cricket. In 2014 he was promoted to Professor.

研究领域

Migration reactions are an important fundamental class of reactions in organometallic chemistry. The migration of alkyl to carbonyl is well known but we are interested in migrations of hydride, alkyl, and other groups to metal coordinated carbene in processes which result in new alkyl ligands. To date, most of our work has involved molybdenum, tungsten, iron, and ruthenium. Such reactions are models for some important C－H and C－C bond formations but surprisingly little is known about these rearrangements. We are attempting to understand the the mechanisms by which they proceed. These migrations are the reverse of α-elimination reactions and we find that some of these compounds α-eliminate under photochemical excitation to regenerate the initial carbene starting materials. Vinylidene chemistry Cartogram of the Molar Volume of the ElementsVinylidene complexes contain the M=C=CR2 group and are implied by some in Fischer Tropsch processes. We are examining their tendencies towards the migration processes indicated above. Further, we have now developed good routes to chiral molecules of the type CpMXL(=C=CR2) and examining their use for fine chemical synthesis. Much of this work is challenging given the sensitivity of many of the compounds. Chemical information and data visualisation I am interested in applications of the world-wide web for chemistry. I developed a number of well known chemical information sources including WebElements and Chemdex. I am working on software to extend "social network" concepts to molecules. Visualisation of chemical data is often a challenge and I have produced new ways of visualising periodicity data for the periodic table including cartograms (illustrated).

近期论文

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Winter MJ (2011) Diffusion cartograms for the display of periodic table data. Journal of Chemical Education, 88(11), 1507-1510. Adams H, Broughton SG, Walters SJ & Winter MJ (1999) Syntheses of neutral iron, ruthenium and manganese half-sandwich vinylidene complexes. Crystal structure of Fe(SnPh3)(CO)(= C = CHPh)(eta-C5H5). CHEM COMMUN(13), 1231-1232. Adams H, Cubbon RJ, Sarsfield MJ & Winter MJ (1999) Cyclopropanation in the reaction of [M(CO)(3)Tp](-) [M = Mo, W; Tp = hydridotris(pyrazolyl)borate] with I(CH2)(3)I and the insertion of isocyanide into metal-acyl bonds. CHEM COMMUN(6), 491-492. Muir JE, Haynes A & Winter MJ (1996) Methyl to alkylidene migration within trans-[WMe(=CHPh)(CO)(2)(eta-C5H5)]. CHEM COMMUN(15), 1765-1766. WINTER MJ, RZEPA HS & WHITAKER BJ (1995) SURFING THE CHEMICAL NET. CHEM BRIT, 31(9), 685-689. WINTER MJ (1995) DEVELOPMENTS ON THE WEB-BASED PERIODIC-TABLE DATABASE OF ELEMENT PROPERTIES CALLED WEBELEMENTS. ABSTR PAP AM CHEM S, 210, 39-COMP. ADAMS H, MALONEY CA, MUIR JE, WALTERS SJ & WINTER MJ (1995) SYNTHESES OF ACYLOXY CARBENE COMPLEXES M(SNPH(3))(CO)(N)(=C(OCOR)PH)(ETA-C5H5) (M=MO,W, N=2, R=ME M=FE, RU, N=1, R=ME, PH, BU(T)) AND X-RAY CRYSTAL-STRUCTURES OF FE(SNPH(3))(CO)(=C(OCOR)PH)(ETA-C5H5) (R=ME, PH). J CHEM SOC CHEM COMM(15), 1511-1512. ADAMS H, BAILEY NA, MARSON CM, RANDALL L & WINTER MJ (1995) SYNTHESIS OF HETEROCYCLIC MOLYBDENUM CARBENE COMPLEXES USING HALOALKYL-SUBSTITUTED EPOXIDES. J ORGANOMET CHEM, 494(1-2), C12-C14. ADAMS H, BAILEY NA, BENTLEY GW, MUIR JE & WINTER MJ (1995) NEW ROUTES TO MOLYBDENUM AND TUNGSTEN CARBYNE COMPLEXES [M(CO)(2)(CPH)(ETA-C(5)H(4)R)] (M=MO OR W, R=SNPH(3) - M=W, R=H). J CHEM SOC CHEM COMM(5), 515-516.