Protonolysis of cationic Pt-C bonds with mild acids:: Can ligand torsional effects speed associative processes?

被引：22

作者：

Feducia, JA ^{[1
]}

Campbell, AN ^{[1
]}

Anthis, JW ^{[1
]}

Gagné, MR ^{[1
]}

机构：

[1] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA

来源：

ORGANOMETALLICS | 2006年 / 25卷 / 13期

关键词：

D O I：

10.1021/om051066b

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Tridentate phosphine pincer ligands facilitate the protonolysis of cationic Pt-CH3 compounds ( to Pt dications and CH4) with the ammonium acid Ph2NH2 center dot BF4. Large rate enhancements over nonpincer analogues (> 50 000) are observed. A mechanism is proposed wherein ring strain present in the planar ground-state arrangement of three phosphine ligands is released in putative five-coordinate intermediates and transition states.

引用

页码：3114 / 3117

页数：4

共 48 条

[1] Kinetic studies on thiolato-ligand substitution reactions with halide ions of square-planar palladium(II) complex with bis(2-(diphenylphosphino)ethyl)phenylphosphine [J].

Aizawa, S ;

Sone, Y ;

Kawamoto, T ;

Yamada, S ;

Nakamura, M .

INORGANICA CHIMICA ACTA, 2002, 338 :235-239

[2] Preparation, solution behaviour and X-ray crystal structure of [PtOTf(triphos)]OTf [J].

Annibale, G ;

Bergamini, P ;

Bertolasi, V ;

Cattabriga, M ;

Ferretti, V .

INORGANIC CHEMISTRY COMMUNICATIONS, 2000, 3 (06) :303-306

[3] [PtOTf(triphos)]OTf and [PtMe2(triphos-P,P′)] as versatile synthons of platinum(II)-triphos species [J].

Annibale, G ;

Bergamini, P ;

Cattabriga, M .

INORGANICA CHIMICA ACTA, 2001, 316 (1-2) :25-32

[4] Electron-poor benzonitriles as labile, stabilizing ligands in asymmetric catalysis [J].

Becker, JJ ;

Van Orden, LJ ;

White, PS ;

Gagné, MR .

ORGANIC LETTERS, 2002, 4 (05) :727-730

[5] EXCLUSION OF 6-COORDINATE INTERMEDIATES IN THE ELECTROCHEMICAL REDUCTION OF CO2 CATALYZED BY [PD(TRIPHOSPHINE)(CH3CN)](BF4)(2) COMPLEXES [J].

BERNATIS, PR ;

MIEDANER, A ;

HALTIWANGER, RC ;

DUBOIS, DL .

ORGANOMETALLICS, 1994, 13 (12) :4835-4843

[6] Synthesis and reactivity of [(C2F5)2MeP]2Pt(Me)X (X = Me,O2CCF3, OTf,OSO2F):: A reactivity comparison with chelate acceptor analogues [J].

Butikofer, JL ;

Hoerter, JM ;

Peters, RG ;

Roddick, DM .

ORGANOMETALLICS, 2004, 23 (03) :400-408

[7] Mechanisms of C-C and C-H alkane reductive eliminations from octahedral Pt(IV): Reaction via five-coordinate intermediates or direct elimination? [J].

Crumpton-Bregel, DM ;

Goldberg, KI .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (31) :9442-9456

[8] CHEMISTRY OF ENOXYSILACYCLOBUTANES - HIGHLY SELECTIVE UNCATALYZED ALDOL ADDITIONS [J].

DENMARK, SE ;

GRIEDEL, BD ;

COE, DM ;

SCHNUTE, ME .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1994, 116 (16) :7026-7043

[9] Reactivity of platinum-oxygen bonds: Kinetic and mechanistic studies of the carbonylation of platinum aryloxide complexes and the formation of (Aryloxy)carbonyls [J].

Dockter, DW ;

Fanwick, PE ;

Kubiak, CP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1996, 118 (20) :4846-4852

[10] MEDIATED ELECTROCHEMICAL REDUCTION OF CO2 - PREPARATION AND COMPARISON OF AN ISOELECTRONIC SERIES OF COMPLEXES [J].

DUBOIS, DL ;

MIEDANER, A .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1987, 109 (01) :113-117

← 1 2 3 4 5 →