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[{Au(IPr)}(2)(mu-OH)]X complexes : synthetic, structural and catalytic studies

(2011) CHEMISTRY-A EUROPEAN JOURNAL. 17(4). p.1238-1246
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Abstract
The synthesis of a series of dinuclear gold hydroxide complexes has been achieved. These complexes of type [{Au(IPr)}2(mu-OH)]X (X =BF4, NTf2, OTf, FABA, SbF6; IPr =2,6-bis(disopropylphenyl)imidazol-2-ylidene; NTf2= bis(trifluoromethanesulfonyl)imidate; OTf = trifluoromethanesulfonate; FABA = tetrakis(pentafluorophenyl)borate) are easily formed in the presence of water and prove highly efficient in the catalytic hydration of nitrites. Their facile formation in aqueous media suggests they are of relevance in gold-catalyzed reactions involving water. Additionally, a series of [Au-(IPr)(NCR)][BR4] (R = alkyl, aryl) ficient in the catalytic hydration of nitrites. Their facile formation in aqueous media suggests they are of relevance in gold-catalyzed reactions involving water. Additionally, a series of [Au-(IPr)(NCR)][BR4] (R= alkyl, aryl) complexes was synthesized as they possibly occur as intermediates in the catalytic reaction mechanism. H-1 and C-13 NMR data as well as key bond lengths obtained by X-ray diffraction studies are compared and reveal an interesting structure activity relationship. The collected data indicate a negligible effect of the nature of the nitrite on the reactivity of [Au(L)(NCR)][X] complexes in catalysis.
Keywords
gold, homogeneous catalysis, hydration, N-heterocyclic carbenes, nitrites, N-HETEROCYCLIC CARBENES, GOLD CATALYSIS, CATIONIC GOLD(I), BOND ORDER, CYCLIZATIONS, 1, 6-ENYNES, NITRILES, VALENCE, CYCLOISOMERIZATION, REARRANGEMENTS

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Chicago
Ramon, Ruben S, Sylvain Gaillard, Albert Poater, Luigi Cavallo, Alexandra MZ Slawin, and Steven Nolan. 2011. “[{Au(IPr)}(2)(mu-OH)]X Complexes : Synthetic, Structural and Catalytic Studies.” Chemistry-a European Journal 17 (4): 1238–1246.
APA
Ramon, R. S., Gaillard, S., Poater, A., Cavallo, L., Slawin, A. M., & Nolan, S. (2011). [{Au(IPr)}(2)(mu-OH)]X complexes : synthetic, structural and catalytic studies. CHEMISTRY-A EUROPEAN JOURNAL, 17(4), 1238–1246.
Vancouver
1.
Ramon RS, Gaillard S, Poater A, Cavallo L, Slawin AM, Nolan S. [{Au(IPr)}(2)(mu-OH)]X complexes : synthetic, structural and catalytic studies. CHEMISTRY-A EUROPEAN JOURNAL. 2011;17(4):1238–46.
MLA
Ramon, Ruben S et al. “[{Au(IPr)}(2)(mu-OH)]X Complexes : Synthetic, Structural and Catalytic Studies.” CHEMISTRY-A EUROPEAN JOURNAL 17.4 (2011): 1238–1246. Print.
@article{8169157,
  abstract     = {The synthesis of a series of dinuclear gold hydroxide complexes has been achieved. These complexes of type [{Au(IPr)}2(mu-OH)]X (X =BF4, NTf2, OTf, FABA, SbF6; IPr =2,6-bis(disopropylphenyl)imidazol-2-ylidene; NTf2= bis(trifluoromethanesulfonyl)imidate; OTf = trifluoromethanesulfonate; FABA = tetrakis(pentafluorophenyl)borate) are easily formed in the presence of water and prove highly efficient in the catalytic hydration of nitrites. Their facile formation in aqueous media suggests they are of relevance in gold-catalyzed reactions involving water. Additionally, a series of [Au-(IPr)(NCR)][BR4] (R = alkyl, aryl) ficient in the catalytic hydration of nitrites. Their facile formation in aqueous media suggests they are of relevance in gold-catalyzed reactions involving water. Additionally, a series of [Au-(IPr)(NCR)][BR4] (R= alkyl, aryl) complexes was synthesized as they possibly occur as intermediates in the catalytic reaction mechanism. H-1 and C-13 NMR data as well as key bond lengths obtained by X-ray diffraction studies are compared and reveal an interesting structure activity relationship. The collected data indicate a negligible effect of the nature of the nitrite on the reactivity of [Au(L)(NCR)][X] complexes in catalysis.},
  author       = {Ramon, Ruben S and Gaillard, Sylvain and Poater, Albert and Cavallo, Luigi and Slawin, Alexandra MZ and Nolan, Steven},
  issn         = {0947-6539},
  journal      = {CHEMISTRY-A EUROPEAN JOURNAL},
  keywords     = {gold,homogeneous catalysis,hydration,N-heterocyclic carbenes,nitrites,N-HETEROCYCLIC CARBENES,GOLD CATALYSIS,CATIONIC GOLD(I),BOND ORDER,CYCLIZATIONS,1,6-ENYNES,NITRILES,VALENCE,CYCLOISOMERIZATION,REARRANGEMENTS},
  language     = {eng},
  number       = {4},
  pages        = {1238--1246},
  title        = {[{Au(IPr)}(2)(mu-OH)]X complexes : synthetic, structural and catalytic studies},
  url          = {http://dx.doi.org/10.1002/chem.201002607},
  volume       = {17},
  year         = {2011},
}

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