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Browsing by Author "Müller-Bunz, Helge"
Now showing items 1-20 of 32
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Woods, James A. ; Lalrempuia, Ralte ; Petronilho, Ana ; Müller-Bunz, Helge ; Albrecht, Martin ; et al. (Royal Society of Chemistry, 2014-07-01)Iridium complexes of Cp* and mesoionic carbene ligands were synthesized and evaluated as potential water oxidation catalysts using cerium(IV) ammonium nitrate as a chemical oxidant. Performance was evaluated by turnover ...
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Canseco-Gonzalez, Daniel ; Petronilho, Ana ; Müller-Bunz, Helge ; Albrecht, Martin ; et al. (American Chemical Society, 2013-09-04)A series of gold(I) complexes [AuCl(trz)] were synthesized that contain 1,2,3-triazolylidene (trz) ligands with variable wingtip groups. In the presence of AgBF4, these complexes undergo ligand redistribution to yield ...
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Krüger, Anneke ; Kluser, Evelyne ; Müller-Bunz, Helge ; Neels, Antonia ; Albrecht, Martin (Wiley-VCH, 2012-03)Oxidative addition of donor-functionalised 4-iodoimidazolium salts to palladium(0) provides a selective route for the preparation of chelating abnormal N-heterocylic carbene complexes and enables the introduction of a ...
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Aguiló, Joan ; Naeimi, Atena ; Bofill, Roger ; Müller-Bunz, Helge ; Albrecht, Martin ; et al. (Royal Society of Chemistry, 2014-05-01)Much attention has been paid to heterocyclic N-containing ligands due to their applicability as bridging ligands in the synthesis of redox active dinuclear metal complexes. With this aim, we report the synthesis and full ...
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Nikitin, Kirill ; Müller-Bunz, Helge ; Gilheany, Declan G. (Royal Society of Chemistry, 2012-12-21)Triphenylhalophosphonium halides, Ph3PX2, form crystals comprising bridged linear cations [Ph3P-X-X-X-PPh3]+ where the X3 bridge is shortened from 6.56 Å in Cl-Cl-Cl to 6.37 Å in the Br-Br-Br system. It is proposed that ...
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Petronilho, Ana ; Woods, James A. ; Müller-Bunz, Helge ; Bernhard, Stefan ; Albrecht, Martin (Wiley, 2014-11-24)Metalation of a C2-methylated pyridylimidazolium salt with [IrCp*Cl2]2 affords either an ylidic complex, resulting from C(sp3)[BOND]H bond activation of the C2-bound CH3 group if the metalation is performed in the presence ...
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Petronilho, Ana ; Müller-Bunz, Helge ; Albrecht, Martin (Elsevier, 2015-01)Imidazo[1,2-a]pyridine consisting of a pyridine fused to an imidazolium salt at the imidazolium N1–C2 bond and hence protected from forming normal imidazole-2-ylidene complexes undergoes selective activation of the C5–H ...
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Petronilho, Ana ; Müller-Bunz, Helge ; Albrecht, Martin (Royal Society of Chemistry, 2012-07-04)Reaction of CsOH with triazolium salts affords mesoionic compounds containing an exocyclic oxygen; the same product is obtained by reaction of the corresponding Cu(I) triazolylidenes with CsOH and represents an unusual ...
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Wei, Yingfei ; Petronilho, Ana ; Müller-Bunz, Helge ; Albrecht, Martin (American Chemical Society, 2014-07-28)A set of triazolylidene (trz) nickel(II) complexes [NiCpX(trz)] was synthesized by a direct metalation of the corresponding triazolium salt with nickelocene, NiCp2. While at short reaction times and in the presence of a ...
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Lalrempuia, Ralte ; Müller-Bunz, Helge ; Albrecht, Martin (Wiley, 2011-10-10)An iridium center transfers a methyl group from pyridinium to an aryl unit, using exclusively the pyridine-bound methyl group as a mild methylene source. The reaction also involves cleavage of an unactivated C(aryl)[BOND]H ...
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Albrecht, Martin ; Maji, Pathik ; Häusl, Christina ; Monney, Angèle ; Müller-Bunz, Helge (Elsevier, 2012-01)N-heterocyclic carbene (NHC) coordination to a cobalt(III) center embedded in a porphyrin scaffold has been accomplished by decarboxylation from N,N’-dimethylimidazolium-2-carboxylate in the presence of Co(TPP)Cl (TPP = ...
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Balducci, Daniele ; Conway, Philip A. ; Sapuppo, Giulia ; Müller-Bunz, Helge ; Paradisi, Francesca (Elsevier, 2012-09)A new practical and efficient synthesis of alpha-keto acids was accomplished starting from the synthon 1,4-diacetylpiperazine-2,5-dione. The synthesis encompasses both aromatic and aliphatic substrates proving to be versatile ...
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Khlebnikov, Vsevolod ; Meduri, Angelo ; Müller-Bunz, Helge ; Montini, Tiziano ; Fornasiero, Paolo ; Zangrando, Ennio ; Milani, Barbara ; Albrecht, Martin (ACS, 2012-01-13)A series of palladium complexes were synthesized that comprise three sterically different C,N-bidentate coordinating NHC-pyridine ligands (NHC = N-heterocyclic carbene). In one set, the pyridine and the carbene are linked ...
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Canseco-Gonzalez, Daniel ; Gniewek, Andrzej ; Szulmanowcz, Michal ; Müller-Bunz, Helge ; Trzeciak, Anna M. ; Albrecht, Martin (Wiley, 2012-05-07)A series of PEPPSI-type palladium(II) complexes was synthesized that contain 3-chloropyridine as an easily removable ligand and a triazolylidene as a strongly donating mesoionic spectator ligand. Catalytic tests in ...
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Petronilho, Ana ; Rahman, Mahfujur ; Woods, James A. ; Al-Sayyed, Haris ; Müller-Bunz, Helge ; MacElroy, J. M. Don ; Bernhard, Stefan ; Albrecht, Martin (Royal Society of Chemistry, 2012-10-10)The complex IrCl2(Cp*)(trz) (trz = triazolylidene), 2, was prepared from readily available 1,3-dimethyl-4-phenyl-1,2,3-triazolium salt. Under basic conditions, the C-bound phenyl group readily cyclometalates, while under ...
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Khlebnikov, Vsevolod ; Heckenroth, Marion ; Müller-Bunz, Helge ; Albrecht, Martin (Royal Society of Chemistry, 2013-03-28)Platinum(II) complexes comprising abnormal diimidazolylidene ligands were synthesized from cis-PtMe2(DMSO)(2) using microwave-assisted double C-H bond activation. NMR analysis revealed an unusual solvolysis process, induced ...
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Flanagan, Keith A. ; Sullivan, James A. ; Müller-Bunz, Helge (American Chemical Society, 2007-12-04)4-Dimethylaminopyridine (DMAP)-stabilized palladium nanoparticles with a mean diameter of 3.4 +/- 0.5 mn are prepared from the aqueous phase reduction of Na2PdCl4 using NaBH4 in the presence of DMAP. TEM and UV-vis ...
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Donnelly, Kate F. ; Lalrempuia, Ralte ; Müller-Bunz, Helge ; Albrecht, Martin (American Chemical Society, 2012-11-29)Transmetalation of a 1,4-diphenyl-substituted 1,2,3-triazolylidene silver complex with an electrophilic metal center, e.g., RuII, IrIII, or RhIII, induces spontaneous and chemoselective cyclometalation involving C–H bond ...
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Ghattas, Wadih ; Müller-Bunz, Helge ; Albrecht, Martin (ACS, 2010)A synthetic procedure is described that provides access to [Ru(bpy)3]2+ analogues in which one bpy ligand is replaced by a C,N-bidentate coordinating carbene-benzimidazole ligand (bpy = 2,2’-bipyridine). These new complexes ...
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Krüger, Anneke ; Häller, Jonas ; Müller-Bunz, Helge ; Albrecht, Martin ; et al. (Royal Society of Chemistry, 2011-10-14)Rhodation of trimethylene-bridged diimidazolium salts induces the intramolecular activation of an alkane-type C–H bond and yields mono- and dimetallic complexes containing a formally monoanionic C,C,C-tridentate dicarbene ...
Now showing items 1-20 of 32
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