Mercury Complexes of N-Heterocyclic Carbenes Derived from Imidazolium-Linked Cyclophanes: Synthesis, Structure, and Reactivity

被引：54

作者：

Baker, Murray V. ^{[1
]}

Brown, David H. ^{[1
,2
]}

Haque, Rosenani A. ^{[1
]}

Simpson, Peter V. ^{[1
]}

Skelton, Brian W. ^{[1
]}

White, Allan H. ^{[1
]}

Williams, Charlotte C. ^{[1
]}

机构：

[1] Univ Western Australia, Sch Biomed Biomol & Chem Sci, Crawley, WA 6009, Australia

[2] Curtin Univ Technol, Dept Appl Chem, Nanochem Res Inst, Perth, WA 6845, Australia

来源：

ORGANOMETALLICS | 2009年 / 28卷 / 13期

基金：

澳大利亚研究理事会;

关键词：

PI-STACKING INTERACTIONS; REDOX TRANSMETALATION; COUPLING REACTIONS; CRYSTAL-STRUCTURES; GOLD(I) COMPLEXES; SILVER COMPLEX; LIGANDS; PALLADIUM; BIDENTATE; CHEMISTRY;

D O I：

10.1021/om8011745

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A range of mercury-imidazolylidene complexes have been prepared by reaction of imidazolium-linked cyclophanes with mercury(II) acetate. For cyclophanes based on meta-xylyl groups the mercury complexes are mononuclear and exhibit unprecedented structures in which the mercury atom is bound within the cyclophane ring, the two NHC donors being mutually trans, For cyclophanes based on ortho-xylyl or 2,6-lutidinediyl group, the mercury complexes are dinuclear with a [Hg(mu-L)(2)Hg] Core, in which each mercury atom is coordinated by one NHC from each cyclophane unit. The mononuclear and dinuclear complexes have been structurally characterized. Studies of the NHC-pyridinophane mercury complex indicated that the NHC-Hg bonding is labile, suggesting that the dinuclear complex based on the [Hg(mu-L)(2)Hg] core existed in equilibrium with a mononuclear complex [HgL]. The labile nature of the NHC-Hg bonding was further established by a redox transmetalation reaction of a dinuclear NHC-Hg(II) complex with a Pd(0) source, which afforded an NHC-Pd(II) complex.

引用

页码：3793 / 3803

页数：11

共 55 条

[1]

Arduengo AJ, 1996, HETEROATOM CHEM, V7, P421, DOI 10.1002/(SICI)1098-1071(199611)7:6<421::AID-HC4>3.0.CO

[2]

2-B

[3] The generation of a metallocene-fused imidazol-2-ylidene and its mercury complex [J].

Arduengo, AJ ;

Tapu, D ;

Marshall, WJ .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2005, 44 (44) :7240-7244

[4] Palladium, rhodium and platinum complexes of ortho-xylyl-linked bis-N-heterocyclic carbenes:: Synthesis, structure and catalytic activity [J].

Baker, Murray V. ;

Brown, David H. ;

Simpson, Peter V. ;

Skelton, Brian W. ;

White, Allan H. ;

Williams, Charlotte C. .

JOURNAL OF ORGANOMETALLIC CHEMISTRY, 2006, 691 (26) :5845-5855

[5] Synthesis of a bis(N-heterocyclic carbene)palladium complex via oxidative addition of a C-C bond in a biimidazolium ion [J].

Baker, Murray V. ;

Brown, David H. ;

Hesler, Valerie J. ;

Skelton, Brian W. ;

White, Allan H. .

ORGANOMETALLICS, 2007, 26 (02) :250-252

[6] Azolium cyclophanes [J].

Baker, Murray V. ;

Brown, David H. .

MINI-REVIEWS IN ORGANIC CHEMISTRY, 2006, 3 (04) :333-354

[7] Synthesis and structure of N-heterocyclic carbene complexes of rhodium and iridium derived from an imidazolium-linked cyclophane [J].

Baker, MV ;

Brayshaw, SK ;

Skelton, BW ;

White, AH ;

Williams, CC .

JOURNAL OF ORGANOMETALLIC CHEMISTRY, 2005, 690 (09) :2312-2322

[8] Azolium-linked cyclophanes:: A comprehensive examination of conformations by 1H NMR spectroscopy and structural studies [J].

Baker, MV ;

Bosnich, MJ ;

Brown, DH ;

Byrne, LT ;

Hesler, VJ ;

Skelton, BW ;

White, AH ;

Williams, CC .

JOURNAL OF ORGANIC CHEMISTRY, 2004, 69 (22) :7640-7652

[9] Dinuclear N-heterocyclic carbene complexes of silver(I), derived from imidazolium-linked cyclophanes [J].

Baker, MV ;

Brown, DH ;

Haque, RA ;

Skelton, BW ;

White, AH .

DALTON TRANSACTIONS, 2004, (21) :3756-3764

[10] Synthesis and characterization of a saddle-shaped nickel-carbene complex derived from an imidazolium-linked meta-cyclophane [J].

Baker, MV ;

Skelton, BW ;

White, AH ;

Williams, CC .

ORGANOMETALLICS, 2002, 21 (13) :2674-2678

← 1 2 3 4 5 6 →