Koszinowski, Konrad

[["dc.bibliographiccitation.artnumber","anie.202210211"],["dc.bibliographiccitation.issue","43"],["dc.bibliographiccitation.journal","Angewandte Chemie International Edition"],["dc.bibliographiccitation.volume","61"],["dc.contributor.affiliation","Kreyenschmidt, Friedrich; 1\r\nInstitut für Organische und Biomolekulare Chemie\r\nUniversität Göttingen\r\nTammannstraße 2 37077 Göttingen Germany"],["dc.contributor.affiliation","Eisele, Niklas F.; 1\r\nInstitut für Organische und Biomolekulare Chemie\r\nUniversität Göttingen\r\nTammannstraße 2 37077 Göttingen Germany"],["dc.contributor.affiliation","Hevelke, Valentin; 1\r\nInstitut für Organische und Biomolekulare Chemie\r\nUniversität Göttingen\r\nTammannstraße 2 37077 Göttingen Germany"],["dc.contributor.affiliation","Rahrt, Rene; 1\r\nInstitut für Organische und Biomolekulare Chemie\r\nUniversität Göttingen\r\nTammannstraße 2 37077 Göttingen Germany"],["dc.contributor.affiliation","Kreyenschmidt, Anne‐Kathrin; 2\r\nInstitut für Anorganische Chemie\r\nUniversität Göttingen\r\nTammannstraße 4 37077 Göttingen Germany"],["dc.contributor.affiliation","Koszinowski, Konrad; 1\r\nInstitut für Organische und Biomolekulare Chemie\r\nUniversität Göttingen\r\nTammannstraße 2 37077 Göttingen Germany"],["dc.contributor.author","Kreyenschmidt, Friedrich"],["dc.contributor.author","Eisele, Niklas F."],["dc.contributor.author","Hevelke, Valentin"],["dc.contributor.author","Rahrt, Rene"],["dc.contributor.author","Kreyenschmidt, Anne‐Kathrin"],["dc.contributor.author","Koszinowski, Konrad"],["dc.date.accessioned","2022-11-28T09:40:41Z"],["dc.date.available","2022-11-28T09:40:41Z"],["dc.date.issued","2022-09-26"],["dc.date.updated","2022-11-27T10:11:07Z"],["dc.description.abstract","Abstract\r\nAnionic coordination polymerizations proceed via highly reactive intermediates, whose in situ analysis has remained difficult. Here, we show that electrospray‐ionization mass spectrometry is a promising method to obtain detailed information on the polymerization process. Focusing on polymerization reactions of 1,3‐dienes initiated by CoCl2/RLi (R=Me, nBu, tBu, Ph), we directly observe the growing polymer chains and characterize the active anionic cobalt centers by gas‐phase fragmentation experiments. On the basis of these results, we suggest a plausible mechanism for the polymerization reaction. Moreover, the ESI mass spectra permit the determination of molecular weight distributions, which are in good agreement with those derived from NMR‐spectroscopic as well as MALDI mass‐spectrometric measurements, and afford a wealth of kinetic data."],["dc.description.abstract","Negative‐ion mode ESI mass spectrometry permits the direct observation of anionic polymers resulting from the reaction of 1,3‐dienes with CoCl2 and organolithium reagents.\r\n\r\nimage"],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659"],["dc.identifier.doi","10.1002/anie.202210211"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/117297"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-597"],["dc.relation.eissn","1521-3773"],["dc.relation.issn","1433-7851"],["dc.rights","This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes."],["dc.rights.uri","http://onlinelibrary.wiley.com/termsAndConditions#vor"],["dc.title","In‐Situ Analysis of Anionic Coordination Polymerizations by Electrospray‐Ionization Mass Spectrometry"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["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","152"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","ChemistryOpen"],["dc.bibliographiccitation.lastpage","160"],["dc.bibliographiccitation.volume","3"],["dc.contributor.author","Kotyrba, Ursula M."],["dc.contributor.author","Proepper, Kevin"],["dc.contributor.author","Sachs, Eike-F."],["dc.contributor.author","Myanovska, Anastasiya"],["dc.contributor.author","Joppe, Tobias"],["dc.contributor.author","Lissy, Friederike"],["dc.contributor.author","Sheldrick, George M."],["dc.contributor.author","Koszinowski, Konrad"],["dc.contributor.author","Diederichsen, Ulf"],["dc.date.accessioned","2018-11-07T09:37:00Z"],["dc.date.available","2018-11-07T09:37:00Z"],["dc.date.issued","2014"],["dc.description.abstract","The DNA bisintercalator triostin A is structurally based on a disulfide-bridged depsipeptide scaffold that provides preorganization of two quinoxaline units in 10.5 angstrom distance. Triostin A analogues are synthesized with nucleobase recognition units replacing the quinoxalines and containing two additional recognition units in between. Thus, four nucleobase recognition units are organized on a rigid template, well suited for DNA double strand interactions. The new tetra-nucleobase binders are synthesized as aza-TANDEM derivatives lacking the N-methylation of triostin A and based on a cyclopeptide backbone. Synthesis of two tetra-nucleobase aza-TANDEM derivatives is established, DNA interaction analyzed by microscale thermophoresis, cytotoxic activity studied and a nucleobase sequence dependent self-aggregation investigated by mass spectrometry."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [DI 542/7-1, SH 14/5-1]"],["dc.identifier.doi","10.1002/open.201400001"],["dc.identifier.isi","000341175700005"],["dc.identifier.pmid","25478311"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11914"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32739"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-v C H Verlag Gmbh"],["dc.relation.issn","2191-1363"],["dc.rights","CC BY-NC 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by-nc/3.0"],["dc.title","Triostin A Derived Cyclopeptide as Architectural Template for the Alignment of Four Recognition Units"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["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"]]