Correlation of metal spin state with catalytic reactivity:: Polymerizations mediated by α-diimine-iron complexes

被引:92
作者
Shaver, MP [1 ]
Allan, LEN [1 ]
Rzepa, HS [1 ]
Gibson, VC [1 ]
机构
[1] Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England
关键词
alpha-diimines; homogeneous catalysis; iron; polymerization; spin state;
D O I
10.1002/anie.200502985
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The mechanism of styrene polymerization by α-diimine iron complexes correlates with the metal spin state of the catalyst. Experimental and theoretical studies indicate that high-spin catalysts are halogenophilic, resulting in atom transfer radical polymerization (ATRP), while intermediate-spin complexes are carbophilic giving rise to catalytic chain transfer (CCT, see graph). (Graph Presented) © 2006 Wiley-VCH Verlag GmbH & Co. KGaA.
引用
收藏
页码:1241 / 1244
页数:4
相关论文
共 22 条
[1]   Imidazolylidenes, imidazolinylidenes and imidazolidines [J].
Arduengo, AJ ;
Krafczyk, R ;
Schmutzler, R ;
Craig, HA ;
Goerlich, JR ;
Marshall, WJ ;
Unverzagt, M .
TETRAHEDRON, 1999, 55 (51) :14523-14534
[2]   Multielectron redox chemistry of iron porphyrinogens [J].
Bachmann, J ;
Nocera, DG .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (13) :4730-4743
[3]   NEW POLYNUCLEAR COMPOUNDS OF IRON(II) CHLORIDE WITH OXYGEN DONOR LIGANDS .1. FE4CL8(THF)6 - SYNTHESIS AND A SINGLE-CRYSTAL X-RAY STRUCTURE DETERMINATION [J].
COTTON, FA ;
LUCK, RL ;
SON, KA .
INORGANICA CHIMICA ACTA, 1991, 179 (01) :11-15
[4]   The performance of nonhybrid density functionals for calculating the structures and spin states of Fe(II) and Fe(III) complexes [J].
Deeth, RJ ;
Fey, N .
JOURNAL OF COMPUTATIONAL CHEMISTRY, 2004, 25 (15) :1840-1848
[5]   SYNTHESIS OF ALPHA-DIONES AND ALPHA-DIIMINES BY REGIOSELECTIVE ALPHA-ALKYLATION OF 2,3-ALKANEDIIMINES [J].
DEKIMPE, N ;
DHONDT, L ;
STANOEVA, E .
TETRAHEDRON LETTERS, 1991, 32 (31) :3879-3882
[6]   Low-lying electronic states of FeNC and FeCN: A theoretical journey into isomerization and quartet/sextet competition [J].
DeYonker, NJ ;
Yamaguchi, Y ;
Allen, WD ;
Pak, C ;
Schaefer, HF ;
Peterson, KA .
JOURNAL OF CHEMICAL PHYSICS, 2004, 120 (10) :4726-4741
[7]   Electron paramagnetic resonance analysis of different Azotobacter vinelandii nitrogenase MoFe-protein conformations generated during enzyme turnover:: Evidence for S = 3/2 spin states from reduced MoFe-protein intermediates [J].
Fisher, K ;
Newton, WE ;
Lowe, DJ .
BIOCHEMISTRY, 2001, 40 (11) :3333-3339
[8]   Polymerization of methyl methacrylate using four-coordinate (α-diimine)iron catalysts:: Atom transfer radical polymerization vs catalytic chain transfer [J].
Gibson, VC ;
O'Reilly, RK ;
Wass, DF ;
White, AJP ;
Williams, DJ .
MACROMOLECULES, 2003, 36 (08) :2591-2593
[9]   Four-coordinate iron complexes bearing α-diimine ligands:: efficient catalysts for Atom Transfer Radical Polymerisation (ATRP) [J].
Gibson, VC ;
O'Reilly, RK ;
Reed, W ;
Wass, DF ;
White, AJP ;
Williams, DJ .
CHEMICAL COMMUNICATIONS, 2002, (17) :1850-1851
[10]   CRYSTAL STRUCTURE AND MOLECULAR STEREOCHEMISTRY OF METHOXYIRON(3) MESOPORPHYRIN-9 DIMETHYL ESTER [J].
HOARD, JL ;
HAMOR, MJ ;
HAMOR, TA ;
CAUGHEY, WS .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1965, 87 (11) :2312-+