Koszinowski, Konrad

[["dc.bibliographiccitation.firstpage","3213"],["dc.bibliographiccitation.issue","13"],["dc.bibliographiccitation.journal","Chemistry - A European Journal"],["dc.bibliographiccitation.lastpage","3219"],["dc.bibliographiccitation.volume","23"],["dc.contributor.author","Parchomyk, Tobias"],["dc.contributor.author","Koszinowski, Konrad"],["dc.date.accessioned","2018-11-07T10:26:29Z"],["dc.date.available","2018-11-07T10:26:29Z"],["dc.date.issued","2017"],["dc.description.abstract","The cluster ion Me12Fe8- is an unprecedented representative of organoiron species, which are of great interest because of their possible role as intermediates in iron-catalyzed cross-coupling reactions. To learn more about its behavior in solution, the possible formation of related cluster ions, and their reactivity, electrospray-ionization mass spectrometry and gas-phase experiments were performed. Me12Fe8- adopts a highly dynamic behavior in solution and disappears in the presence of the chelating ligand N, N, N', N'-tetramethylethylenediamine. Besides homoleptic Me12Fe8-, its heteroleptic analogues Me12-nFe8Phn-, n=1-5, are also accessible. Me12Fe8- undergoes iron-halogen exchange reactions with aryl halides. These substrates, as well as their alkyl counterparts, mediate the formation of new homoleptic cluster ions up to Me18Fe12-. In contrast, no evidence was found for oxidative additions or related reactions. Gas-phase fragmentation of the cluster ions results in numerous different reactions, ranging from the loss of single methyl radicals to the reductive elimination of MePh."],["dc.identifier.doi","10.1002/chem.201605602"],["dc.identifier.isi","000395774700031"],["dc.identifier.pmid","28071817"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/43055"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.publisher","Wiley-v C H Verlag Gmbh"],["dc.relation.issn","1521-3765"],["dc.relation.issn","0947-6539"],["dc.title","Solution and Gas-Phase Reactivity of Me12Fe8- and Related Cluster Ions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3750"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","The Journal of Organic Chemistry"],["dc.bibliographiccitation.lastpage","3757"],["dc.bibliographiccitation.volume","86"],["dc.contributor.author","Eisele, Niklas F."],["dc.contributor.author","Koszinowski, Konrad"],["dc.date.accessioned","2021-06-01T09:41:34Z"],["dc.date.available","2021-06-01T09:41:34Z"],["dc.date.issued","2021"],["dc.identifier.doi","10.1021/acs.joc.0c02504"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/84966"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.eissn","1520-6904"],["dc.relation.issn","0022-3263"],["dc.title","Direct Detection of Free and Counterion-Bound Carbanions by Electrospray-Ionization Mass Spectrometry"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","25"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Organometallics"],["dc.bibliographiccitation.lastpage","33"],["dc.bibliographiccitation.volume","39"],["dc.contributor.author","Auth, Thomas"],["dc.contributor.author","Koszinowski, Konrad"],["dc.contributor.author","O’Hair, Richard A. J."],["dc.date.accessioned","2020-12-10T18:09:14Z"],["dc.date.available","2020-12-10T18:09:14Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1021/acs.organomet.9b00521"],["dc.identifier.eissn","1520-6041"],["dc.identifier.issn","0276-7333"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/73577"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Dissecting Transmetalation Reactions at the Molecular Level: Phenyl Transfer in Metal Borate Complexes"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","81"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Journal of Mass Spectrometry"],["dc.bibliographiccitation.lastpage","87"],["dc.bibliographiccitation.volume","54"],["dc.contributor.author","Parchomyk, Tobias"],["dc.contributor.author","Koszinowski, Konrad"],["dc.date.accessioned","2020-12-10T14:06:48Z"],["dc.date.available","2020-12-10T14:06:48Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1002/jms.4313"],["dc.identifier.issn","1076-5174"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70027"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Substitution reactions of gaseous ions in a three-dimensional quadrupole ion trap"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","144"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Journal of Mass Spectrometry"],["dc.bibliographiccitation.lastpage","151"],["dc.bibliographiccitation.volume","52"],["dc.contributor.author","Koszinowski, Konrad"],["dc.contributor.author","Lissy, Friederike"],["dc.date.accessioned","2018-11-07T10:26:31Z"],["dc.date.available","2018-11-07T10:26:31Z"],["dc.date.issued","2017"],["dc.description.abstract","To improve our understanding of the electrospray ionization (ESI) process, we have subjected equimolar mixtures of salts A(+) X- (A(+) = Li+, NBu4+; X-= Br (-), ClO4-, BF4-, BPh4-))in different solvents (CH3CN, tetrahydrofuran, CH3OH, H2O) to negative-ion mode ESI and analyzed the relative ESI activity of the different anionic model analytes. The ESI activity of the large and hydrophobic BPh(4)(-)ion greatly exceeds that of the smaller and more hydrophilic anions Br-, ClO4- and BF4-, which we ascribe to its higher surface activity. Moreover, the ESI activity of the anions is modulated by the action of the counter-ions and their different tendency toward ion pairing. The tendency toward ion pairing can be reduced by the addition of the chelating ligands 12-crown-4 and 2.2.1 cryptand and is, although to a smaller degree, further influenced by the variation of the solvent. Complementary electrical conductivity measurements afford additional information on the interactions of the ionic constituents of the sample solutions. Copyright (C) 2017 John Wiley & Sons, Ltd."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [KO 2875/4-1]"],["dc.identifier.doi","10.1002/jms.3911"],["dc.identifier.isi","000398039700003"],["dc.identifier.pmid","28098404"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/43064"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.publisher","Wiley"],["dc.relation.issn","1096-9888"],["dc.relation.issn","1076-5174"],["dc.title","ESI activity of Br-, BF4-, ClO4 (-) and BPh4- anions in the presence of Li+ and NBu4+ counter-ions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2354"],["dc.bibliographiccitation.issue","14"],["dc.bibliographiccitation.journal","Organometallics"],["dc.bibliographiccitation.lastpage","2363"],["dc.bibliographiccitation.volume","40"],["dc.contributor.author","Deuker, Marius"],["dc.contributor.author","Yang, Yang"],["dc.contributor.author","O’Hair, Richard A. J."],["dc.contributor.author","Koszinowski, Konrad"],["dc.date.accessioned","2021-09-01T06:42:26Z"],["dc.date.available","2021-09-01T06:42:26Z"],["dc.date.issued","2021"],["dc.identifier.doi","10.1021/acs.organomet.1c00118"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/89054"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-455"],["dc.relation.eissn","1520-6041"],["dc.relation.issn","0276-7333"],["dc.title","Tetraorganylargentate(III) Complexes: Key Intermediates in Silver-Mediated Cross-Coupling Reactions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","5912"],["dc.bibliographiccitation.issue","23"],["dc.bibliographiccitation.journal","Chemistry – A European Journal"],["dc.bibliographiccitation.lastpage","5921"],["dc.bibliographiccitation.volume","25"],["dc.contributor.author","Kreyenschmidt, Friedrich"],["dc.contributor.author","Meurer, Selim E."],["dc.contributor.author","Koszinowski, Konrad"],["dc.date.accessioned","2020-12-10T14:05:53Z"],["dc.date.available","2020-12-10T14:05:53Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1002/chem.v25.23"],["dc.identifier.eissn","1521-3765"],["dc.identifier.issn","0947-6539"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/69694"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Mechanisms of Cobalt/Phosphine‐Catalyzed Cross‐Coupling Reactions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","224301"],["dc.bibliographiccitation.issue","22"],["dc.bibliographiccitation.journal","The Journal of Chemical Physics"],["dc.bibliographiccitation.volume","154"],["dc.contributor.author","Daly, Steven"],["dc.contributor.author","Weske, Sebastian"],["dc.contributor.author","Mravak, Antonija"],["dc.contributor.author","Krstić, Marjan"],["dc.contributor.author","Kulesza, Alexander"],["dc.contributor.author","Antoine, Rodolphe"],["dc.contributor.author","Bonačić-Koutecký, Vlasta"],["dc.contributor.author","Dugourd, Philippe"],["dc.contributor.author","Koszinowski, Konrad"],["dc.contributor.author","O’Hair, Richard A. J."],["dc.date.accessioned","2021-10-01T09:57:51Z"],["dc.date.available","2021-10-01T09:57:51Z"],["dc.date.issued","2021"],["dc.identifier.doi","10.1063/5.0052697"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/89930"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-469"],["dc.relation.eissn","1089-7690"],["dc.relation.issn","0021-9606"],["dc.title","Phenyl argentate aggregates [Ag n Ph n + 1 ] − (n = 2–8): Models for the self-assembly of atom-precise polynuclear organometallics"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2706"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Angewandte Chemie International Edition"],["dc.bibliographiccitation.lastpage","2710"],["dc.bibliographiccitation.volume","53"],["dc.contributor.author","Hernan-Gomez, Alberto"],["dc.contributor.author","Herd, Emma"],["dc.contributor.author","Hevia, Eva"],["dc.contributor.author","Kennedy, Alan R."],["dc.contributor.author","Knochel, Paul"],["dc.contributor.author","Koszinowski, Konrad"],["dc.contributor.author","Manolikakes, Sophia M."],["dc.contributor.author","Mulvey, Robert E."],["dc.contributor.author","Schnegelsberg, Christoph"],["dc.date.accessioned","2018-11-07T09:42:43Z"],["dc.date.available","2018-11-07T09:42:43Z"],["dc.date.issued","2014"],["dc.description.abstract","The pivalates RZnOPivMg(OPiv)XnLiCl (OPiv=pivalate; R=aryl; X=Cl, Br, I) stand out amongst salt-supported organometallic reagents, because apart from their effectiveness in Negishi cross-coupling reactions, they show more resistance to attack by moist air than conventional organometallic compounds. Herein a combination of synthesis, coupling applications, X-ray crystallographic studies, NMR (including DOSY) studies, and ESI mass spectrometric studies provide details of these pivalate reagents in their own right. A p-tolyl case system shows that in [D-8]THF solution these reagents exist as separated Me(p-C6H4)ZnCl and Mg(OPiv)(2) species. Air exposure tests and X-ray crystallographic studies indicate that Mg(OPiv)(2) enhances the air stability of aryl zinc species by sequestering H2O contaminants. Coupling reactions of Me(p-C6H4)ZnX (where X=different salts) with 4-bromoanisole highlight the importance of the presence of Mg(OPiv)(2). Insight into the role of LiCl in these multicomponent mixtures is provided by the molecular structure of [(THF)(2)Li-2(Cl)(2)(OPiv)(2)Zn]."],["dc.identifier.doi","10.1002/anie.201309841"],["dc.identifier.isi","000331774700031"],["dc.identifier.pmid","24482294"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/34017"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-v C H Verlag Gmbh"],["dc.relation.issn","1521-3773"],["dc.relation.issn","1433-7851"],["dc.title","Organozinc Pivalate Reagents: Segregation, Solubility, Stabilization, and Structural Insights"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","10992"],["dc.bibliographiccitation.issue","33"],["dc.bibliographiccitation.journal","Chemistry - A European Journal"],["dc.bibliographiccitation.lastpage","10999"],["dc.bibliographiccitation.volume","19"],["dc.contributor.author","Putau, Aliaksei"],["dc.contributor.author","Wilken, Mona"],["dc.contributor.author","Koszinowski, Konrad"],["dc.date.accessioned","2018-11-07T09:21:18Z"],["dc.date.available","2018-11-07T09:21:18Z"],["dc.date.issued","2013"],["dc.description.abstract","We have used a combination of electrospray ionization mass spectrometry and electrical conductivity measurements to analyze solutions of the Gilman cuprates LiCuR2LiX, with R=Ph, Bu and X=Cl, Br, I, in tetrahydrofuran and have compared our findings with previous results on cyanocuprates LiCuR2LiCN. Among the various polynuclear organocuprate ions observed, Li2Cu3Ph6-, LiCu4Ph6-, and Cu5Ph6- are of particular interest because aggregates of the same composition are known from X-ray crystal structures. Control experiments have indicated that the polynuclear organocuprate anions detected in solution are indeed identical to those formed in the solid state. As abundant ions of the type Li2Cu3R6- are found in solutions of Gilman cuprates and cyanocuprates alike, their possible involvement in organocuprate reactions should be considered. For comparison, we have also included solutions of LiCu(R)I, LiCuX2LiX, LiCuX2, and CuCN2LiX in the present study."],["dc.identifier.doi","10.1002/chem.201300804"],["dc.identifier.isi","000322626500034"],["dc.identifier.pmid","23843331"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29082"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-v C H Verlag Gmbh"],["dc.relation.issn","0947-6539"],["dc.title","Ionic Aggregates of Lithium Organocuprates"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]