Dechert, Sebastian

[["dc.bibliographiccitation.firstpage","3036"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Inorganica Chimica Acta"],["dc.bibliographiccitation.lastpage","3040"],["dc.bibliographiccitation.volume","363"],["dc.contributor.author","Penkova, Larysa"],["dc.contributor.author","Demeshko, Serhiy"],["dc.contributor.author","Pavlenko, Vadim A."],["dc.contributor.author","Dechert, Sebastian"],["dc.contributor.author","Meyer, Franc"],["dc.contributor.author","Fritsky, Igor O."],["dc.date.accessioned","2018-11-07T08:38:00Z"],["dc.date.available","2018-11-07T08:38:00Z"],["dc.date.issued","2010"],["dc.description.abstract","The synthesis, crystal structure and magnetic properties of manganese(III) binuclear complexes [Mn(2)(III)(L-3H)(2)(CH(3)OH)(4)]center dot 2CH(3)OH (1) and [Mn(2)(III)(L-3H)(2)(Py)(4)]center dot 2Py (2) (L = 3-[(1E)-N-hydroxyethanimidoyl]- 4-methyl-1H-pyrazole-5-carboxylic acid) are reported. The ligand contains two distinct donor compartments formed by the pyrazolate-N and the oxime or the carboxylic groups. The complexes were characterized by X-ray single crystal diffraction, revealing that both 1 and 2 consist of dinuclear units in which the two metal ions are linked by double pyrazolate bridges with a planar {Mn(2)N(4)} core. Cryomagnetic measurements show antiferromagnetic interaction with g = 1.99, J = -3.6 cm (1), Theta = -2.02 K for 1 and g = 2.00, J = -3.7 cm (1), Theta = 1.43 K for 2. (C) 2010 Elsevier B. V. All rights reserved."],["dc.identifier.doi","10.1016/j.ica.2010.04.038"],["dc.identifier.isi","000282360200046"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/18673"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Sa"],["dc.relation.issn","0020-1693"],["dc.title","Binuclear manganese(III) complexes of an unsymmetric pyrazolate-based compartmental ligand with hard donor set"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","10049"],["dc.bibliographiccitation.issue","21"],["dc.bibliographiccitation.journal","Inorganic Chemistry"],["dc.bibliographiccitation.lastpage","10059"],["dc.bibliographiccitation.volume","48"],["dc.contributor.author","Stollenz, Michael"],["dc.contributor.author","John, Michael"],["dc.contributor.author","Gehring, Henrike"],["dc.contributor.author","Dechert, Sebastian"],["dc.contributor.author","Grosse, Christian"],["dc.contributor.author","Meyer, Franc"],["dc.date.accessioned","2018-11-07T11:22:18Z"],["dc.date.available","2018-11-07T11:22:18Z"],["dc.date.issued","2009"],["dc.description.abstract","The synthesis of three pyrazole-based, potentially binucleating ligands 3,5-bis(R(1)N(CH(3))CH(2))-4-R(2)pyrazole (L(1)H: R(1) pyridyl-2-methyl-, R(2) = Ph; L(2)H: R(1) = 8-quinolyl-, R(2) = H; L(3)H: R(1) = 8-quinolyl-, R(2) = Ph) is described. Reaction of L(1-3)H with 1 equiv. of mesitylcopper affords oligonuclear homoleptic complexes of the type [CuL](n) (1-3). The single crystal X-ray structure of 2 shows a tetranuclear assembly of linear coordinated copper(I)-centers bridged by pyrazolato ligands that alternate above and below the Cu(4) plane, with additional weak interactions from some of the ligand side arms. As the single crystal X-ray structure of 3 reveals, phenyl substitution at the 4-position of the pyrazolato framework leads to significant structural modification of the Cu(4) array, giving a rhombical tetranuclear complex with two linear coordinated copper(I) centers that exhibit a short intramolecular Cu:: center dot Cu contact (2.8212(10) angstrom) and two peripheral copper(I) centers in a distorted tetrahedral coordination mode. Thus, 3 represents a very rare example of an inorganic pyrazolato cuprate which can also be viewed as a partly rearranged structural isomer of 2. Furthermore, the crystal lattice of 3 shows an extended network of intra- and intermolecular pi-pi stacking interactions between the aromatic rings. In solution, 1-3 each form two types of oligomers a and b that slowly (<1 s(-1)) equilibrate at room temperature. Using Diffusion Ordered Spectroscopy (DOSY) and variable temperature (1)H NMR spectroscopy it can be shown that a and b correspond to a tetrameric and a (planar) trimeric species. Coordination of the pyridyl/quinolyl side arms that is observed in the solid state seems to be only transient in solution."],["dc.description.sponsorship","Fonds der Chernischen Industrie"],["dc.identifier.doi","10.1021/ic900727h"],["dc.identifier.isi","000270987400019"],["dc.identifier.pmid","19803532"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/55964"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Chemical Soc"],["dc.relation.issn","0020-1669"],["dc.title","Oligonuclear Homoleptic Copper(I) Pyralzolates with Multinucleating Ligand Scaffolds: High Structural Diversity in Solid-State and Solution"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","M691"],["dc.bibliographiccitation.journal","ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE"],["dc.bibliographiccitation.lastpage","U863"],["dc.bibliographiccitation.volume","65"],["dc.contributor.author","Davydenko, Yuliya M."],["dc.contributor.author","Fritsky, Igor O."],["dc.contributor.author","Pavlenko, Vadim O."],["dc.contributor.author","Meyer, Franc"],["dc.contributor.author","Dechert, Sebastian"],["dc.date.accessioned","2018-11-07T08:28:50Z"],["dc.date.available","2018-11-07T08:28:50Z"],["dc.date.issued","2009"],["dc.description.abstract","In the title compound, [Cu(C2H3O2)(2)(C5H8N2)(2)], the Cu-II atom has a distorted tetragonal-bipyramidal geometry, with the equatorial plane formed by two N atoms belonging to two 3,5-dimethyl-1H-pyrazole ligands and two O atoms from two acetate anions. The second O atoms of the acetate groups provide elongated Cu-O axial contacts, so that the acetates appear to be coordinated in a pseudo-chelate fashion. The pyrazole ligands are situated in cis positions with respect to each other. In the crystal structure, molecules are linked through intermolecular N-H center dot center dot center dot O hydrogen bonds, forming a one-dimensional chain."],["dc.description.sponsorship","Ministry of Education and Science of Ukraine [M/42-2008]"],["dc.identifier.doi","10.1107/S1600536809019400"],["dc.identifier.isi","000266514400073"],["dc.identifier.pmid","21583048"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/5942"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16512"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","1600-5368"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Bis(acetato-kappa O-2,O ')bis(3,5-dimethyl-1H-pyrazole-kappa N-2)copper(II)"],["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.journal","Angewandte Chemie International Edition"],["dc.contributor.author","Li, Ming"],["dc.contributor.author","Gupta, Sandeep K."],["dc.contributor.author","Dechert, Sebastian"],["dc.contributor.author","Demeshko, Serhiy"],["dc.contributor.author","Meyer, Franc"],["dc.date.accessioned","2021-06-01T09:41:09Z"],["dc.date.available","2021-06-01T09:41:09Z"],["dc.date.issued","2021"],["dc.identifier.doi","10.1002/anie.202101387"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/84832"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.eissn","1521-3773"],["dc.relation.issn","1433-7851"],["dc.title","Merging Pincer Motifs and Potential Metal–Metal Cooperativity in Cobalt Dinitrogen Chemistry: Efficient Catalytic Silylation of N 2 to N(SiMe 3 ) 3"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","7428"],["dc.bibliographiccitation.issue","20"],["dc.bibliographiccitation.journal","Journal of the American Chemical Society"],["dc.bibliographiccitation.lastpage","7434"],["dc.bibliographiccitation.volume","136"],["dc.contributor.author","Dalle, Kristian"],["dc.contributor.author","Gruene, Tim"],["dc.contributor.author","Dechert, Sebastian"],["dc.contributor.author","Demeshko, Serhiy"],["dc.contributor.author","Meyer, Franc"],["dc.date.accessioned","2018-11-07T09:40:02Z"],["dc.date.available","2018-11-07T09:40:02Z"],["dc.date.issued","2014"],["dc.description.abstract","The ability of many copper metalloenzymes to activate 02 and transfer it to organic substrates has motivated extensive attention in the literature. Investigations focusing on synthetic analogues have provided a detailed understanding of the structures of potential intermediates, thereby helping to guide mechanistic studies. We report herein a crystallographically characterized synthetic Cu-2(II)(mu-eta(1):eta(1)-O-2) complex exhibiting cis-peroxo bonding geometry, known in iron chemistry but previously unobserved for copper. Detailed investigation by UV-vis, resonance Raman, and infrared spectroscopies provides evidence for a significantly diminished copper-oxygen interaction (epsilon approximate to 3000 M-1 cm(-1), nu(Cu-O) = 437 cm(-1), nu(O-O) = 799 cm(-1)) relative to those in known 'coupled' Cu2O2 species, consistent with magnetic measurements which show that the peroxide mediates only weak antiferromagnetic coupling (-2J = 144 cm(-1)). These characteristics are comparable with those of a computationally predicted transition state for 02 binding to type 3 copper centers, providing experimental evidence for the proposed mechanism of O-2 activation and supporting the biological relevance of the Cu-2(II)(mu-eta(1):eta(1)-O-2) cis-species. The peroxide bonding arrangement also allows binding of sodium cations, observed both in the solid state and in solution. Binding induces changes on an electronic level, as monitored by UV-vis spectroscopy (K-a = 1700 M-1), reminiscent of redox-inactive metal binding by iron-oxygen species. The results presented highlight the analogous chemistry these reactive oxygen species undergo, with respect to both their mechanism of formation, and the molecular interactions in which they participate."],["dc.identifier.doi","10.1021/ja5025047"],["dc.identifier.isi","000336416600038"],["dc.identifier.pmid","24766458"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33423"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Chemical Soc"],["dc.relation.issn","0002-7863"],["dc.title","Weakly Coupled Biologically Relevant Cu-2(II)(mu-eta(1):eta(1)-O-2) cis-Peroxo Adduct that Binds Side-On to Additional Metal Ions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","796"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","ChemCatChem"],["dc.bibliographiccitation.lastpage","805"],["dc.bibliographiccitation.volume","5"],["dc.contributor.author","Saha, Tapan Kumar"],["dc.contributor.author","Frauendorf, Holm"],["dc.contributor.author","John, Michael"],["dc.contributor.author","Dechert, Sebastian"],["dc.contributor.author","Meyer, Franc"],["dc.date.accessioned","2018-11-07T09:27:35Z"],["dc.date.available","2018-11-07T09:27:35Z"],["dc.date.issued","2013"],["dc.description.abstract","Dyes in wastewater severely affect the nature and quality of water by inhibiting the sunlight penetration into the stream, which thereby reduces the photosynthesis reaction. This poses a serious environmental threat in many developing countries. Recently, new methods for the treatment of colored dye effluent streams have attracted much attention. The [MnIII(tmpyp)]/H2O2 system (tmpyp=meso-tetrakis(1-methylpyridinium-4-yl)porphyrinato) was now found to degrade various azo dyes with remarkably high efficiency under ambient conditions in aqueous solution at certain pH values. Main products of the catalytic degradation of the dye amaranth by [MnIII(tmpyp)]/H2O2 were analyzed. The reaction mechanism was studied in more detail by using rapid-scan stopped-flow spectrophotometry as a function of pH, [catalyst], [H2O2], [dye], and [surfactants]. Spectral analyses and kinetic data suggested rapid formation of an intermediate [MnIII(tmpyp)(OOH)] (a compound 0-type intermediate), followed by the formation of a relatively stable trans-dioxomanganese(V) porphyrin complex, [MnV(O)2(tmpyp)] (a compoundI analog). The one-electron reduction of [MnV(O)2(tmpyp)] to [MnIV(O)(tmpyp)] (a compoundII analog) was accelerated greatly by amaranth. On the basis of the kinetic and spectroscopic data, a reaction mechanism of the formation of reactive intermediates [MnIII(tmpyp)(OOH)], [MnV(O)2(tmpyp)], and [MnIV(O)(tmpyp)] was proposed."],["dc.description.sponsorship","Alexander von Humboldt Foundation"],["dc.identifier.doi","10.1002/cctc.201200475"],["dc.identifier.isi","000315416200026"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/30572"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-v C H Verlag Gmbh"],["dc.relation.issn","1867-3880"],["dc.title","Efficient Oxidative Degradation of Azo Dyes by a Water-Soluble Manganese Porphyrin Catalyst"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3708"],["dc.bibliographiccitation.issue","14"],["dc.bibliographiccitation.journal","Organometallics"],["dc.bibliographiccitation.lastpage","3725"],["dc.bibliographiccitation.volume","30"],["dc.contributor.author","Stollenz, Michael"],["dc.contributor.author","Gehring, Henrike"],["dc.contributor.author","Konstanzer, Vera"],["dc.contributor.author","Fischer, Stefan"],["dc.contributor.author","Dechert, Sebastian"],["dc.contributor.author","Grosse, Christian"],["dc.contributor.author","Meyer, Franc"],["dc.date.accessioned","2018-11-07T08:54:12Z"],["dc.date.available","2018-11-07T08:54:12Z"],["dc.date.issued","2011"],["dc.description.abstract","The synthesis of a series of new pyrazole-based binucleating compartmental ligands, 3,5-bis((RRN)-R-2-N-3)-(4-R-1)-pyrazoles (LH)-H-1-(LH)-H-6 ((LH)-H-1, R-1 = H, R-2 = Me, R-3 = 2-py(CH2); (LH)-H-2, R-1 = Ph, R-2 = Me, R-3 = 2-py(CH2); (LH)-H-3, R-1 = H, R-2 = Cy, R-3 = 2-py(CH2); (LH)-H-4, R-1 = Ph, R-2 = Cy, R-3 = 2-py(CH2); (LH)-H-5, R-1 = Ph, R-2, R-3 = 2-py(CH2), L6H, R-1 = Ph, R-2 = Me, R-3 = 8-quin), together with the X-ray crystal structure of (LH)-H-3 is reported. After deprotonation and subsequent reaction with 2 equiv of [Cu-I(CH3CN)(4)](BF4) and PMe3, (LH)-H-3 forms the stable binuclear Cu-I complex [L-3{Cu(PMe3)}(2)](BF4) (1). The analogous reaction with (LH)-H-6 and 2 equiv of tert-butyl isonitrile affords [L-6{Cu(CNtBu)}(2)](BF4) (2), 1 and 2 represent the first examples of binuclear Cu-I-pyrazolate complexes of the type [LCu21]X that have been characterized by their X-ray crystal structures. With respect to the planes spanned by the pyrazolate backbone, 1 shows a cis orientation of the PMe3 ligands, whereas 2 exhibits a trans arrangement of the tBuNC ligands. (LH)-H-1-(LH)-H-6 are shown to react with 4 equiv of mesitylcopper and stoichiometric amounts of dioxygen, leading to the formation of the unusually stable organocopper frameworks 3-8. These complexes follow a general structural principle that is best described by the heteroleptic O-centered cuprate anion [(MesCu(I))(4) (mu(4)-O)](2-) linked via four trans-oriented sigma-mesityl bridges to two flanking binuclear Cu-I-pyrazolates [(L-1-L-6)Cu-2(I)](+). Thus, 1 and 2 can also be viewed as capping binuclear Cu-I-complex units that are concealed by two ancillary PMe3 and tBuNC ligands, respectively. The exemplary reaction of 4 with an excess of dimethyl acetylenedicarboxylate (DMDAC) supports the observed cuprate features of 3-8, since after hydrolysis the corresponding (syn-)addition product MesC(CO2Me)=C(CO2Me)H (9) and the free ligand (LH)-H-2 are found as major products."],["dc.description.sponsorship","Fonds der Chemischen Industrie"],["dc.identifier.doi","10.1021/om100836j"],["dc.identifier.isi","000292847900006"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8936"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/22617"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Chemical Soc"],["dc.relation.issn","0276-7333"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","From Pyrazolate-Based Binuclear Copper(I) Complexes to Octanuclear sigma-Mesityl-Bridged mu(4)-Oxo-Cuprocuprates: Controlled Dioxygen Splitting by Organocopper Scaffolds"],["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","8141"],["dc.bibliographiccitation.issue","15"],["dc.bibliographiccitation.journal","Inorganic Chemistry"],["dc.bibliographiccitation.lastpage","8149"],["dc.bibliographiccitation.volume","51"],["dc.contributor.author","Das, Animesh"],["dc.contributor.author","Klinke, Felix J."],["dc.contributor.author","Demeshko, Serhiy"],["dc.contributor.author","Meyer, Steffen"],["dc.contributor.author","Dechert, Sebastian"],["dc.contributor.author","Meyer, Franc"],["dc.date.accessioned","2018-11-07T09:07:18Z"],["dc.date.available","2018-11-07T09:07:18Z"],["dc.date.issued","2012"],["dc.description.abstract","A new family of tetranuclear nickel cube complexes [Ni4L4(solv)(4)} (1, solv = MeOH; 2, solv = H2O; H2L = pyrazole-based tridentate {ONO} ligand) has been studied in detail, in particular by X-ray diffraction and superconducting quantum interference device (SQUID) magnetometry. Different solvates 1 center dot H2O, 2 center dot 4C(3)H(6)O, 2-CH2Cl2, and 2 center dot H2O were obtained in crystalline form. Only small structural variations were found for the Ni-O-Ni angles of the [Ni4O4] cores of those compounds, but these slight variations have dramatic consequences for the magnetic properties. [Ni4L4(MeOH)(4)}center dot H2O (1 center dot H2O) and [Ni4L4(H2O)(4)]center dot H2O (2 center dot H2O) can be reversibly interconverted in the solid state by exposure to the respective solvent, MeOH or H2O, and this goes along with a switching of the spin ground state from magnetic (S-T = 4) to diamagnetic (S-T = 0). Likewise the (irreversible) loss of lattice solvent in [Ni4L4(H2O)(4)]center dot 4C(3)H(6)O (2 center dot 4C(3)H(6)O) to give 2 center dot 2C(3)H(6)O changes the ground state from S-T = 4 to S-T = 0. In view of these dramatic solvatomagnetic effects for the present [Ni4L4(solv)(4)] complexes, which occur upon extrusion of lattice solvent or facile exchange of coordinated solvent molecules while keeping the robust [Ni4O4] core intact, a note of care is issued: whenever magnetic data are obtained for powdered material or for crystals that easily loose lattice solvent molecules, the magnetic properties may not necessarily reflect the situation observed in the corresponding single crystal diffraction study. Finally, a thorough analysis of the present series of complexes as well as other {Ni-4(mu(3)-OR)(4)} cubes reported in the literature confirms that a correlation between the (Ni-O-Ni)(av) bond angle and J in {Ni4O4} cubane complexes does indeed exist."],["dc.description.sponsorship","DFG [SFB 602]"],["dc.identifier.doi","10.1021/ic300535d"],["dc.identifier.isi","000307134700026"],["dc.identifier.pmid","22823896"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/25763"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Chemical Soc"],["dc.relation.issn","0020-1669"],["dc.title","Reversible Solvatomagnetic Effect in Novel Tetranuclear Cubane-Type Ni-4 Complexes and Magnetostructural Correlations for the [Ni-4(mu(3)-O)(4)] Core"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","10101"],["dc.bibliographiccitation.issue","31"],["dc.bibliographiccitation.journal","Chemistry - A European Journal"],["dc.bibliographiccitation.lastpage","10106"],["dc.bibliographiccitation.volume","19"],["dc.contributor.author","Albers, Antonia"],["dc.contributor.author","Bayer, Thomas A."],["dc.contributor.author","Demeshko, Serhiy"],["dc.contributor.author","Dechert, Sebastian"],["dc.contributor.author","Meyer, Franc"],["dc.date.accessioned","2018-11-07T09:22:18Z"],["dc.date.available","2018-11-07T09:22:18Z"],["dc.date.issued","2013"],["dc.description.sponsorship","DFG [IGRK 1422]; Cusanuswerk"],["dc.identifier.doi","10.1002/chem.201301760"],["dc.identifier.isi","000321983700006"],["dc.identifier.pmid","23780647"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29311"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0947-6539"],["dc.title","A Functional Model for the Rieske Center: Full Characterization of a Biomimetic N-Ligated [2Fe-2S] Cluster in Different Protonation States"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","5146"],["dc.bibliographiccitation.issue","19"],["dc.bibliographiccitation.journal","Organometallics"],["dc.bibliographiccitation.lastpage","5151"],["dc.bibliographiccitation.volume","27"],["dc.contributor.author","Scheele, Ulrich Juergen"],["dc.contributor.author","Georgiou, Maria"],["dc.contributor.author","John, Michael"],["dc.contributor.author","Dechert, Sebastian"],["dc.contributor.author","Meyer, Franc"],["dc.date.accessioned","2018-11-07T11:10:05Z"],["dc.date.available","2018-11-07T11:10:05Z"],["dc.date.issued","2008"],["dc.description.abstract","Reaction of Ag2O with the N-heterocyclic carbene (NHC) precursors 3,5-bis[3-(2,4,6-trimethylphenyl)imidazolium-1-ylmethyl]-1H-pyrazole bishexafluorophosphate (1a) and 3,5-bis[3-(2,6-diisopropylphenyl)imidazolium-1-ylmethyl]-1H-pyrazole bishexafluorophosphate (1b) yielded silver(l) complexes 2 and 3, respectively. X-ray crystallography revealed a tetranuclear dimeric solid state structure in the case of 2, whereas an unprecedented octanuclear tetrameric \"double-crown\"-like structure was found for 3, presumably due to the slightly bulkier ligand. Unlike 2, complex 3 is not stable in solution but in equilibrium with tetranuclear and hexanuclear complexes 4 and 5, respectively. The identity of those species could be elucidated by detailed NMR spectroscopic studies (H-1, C-13, N-15, Ag-109, and DOSY experiments), which also provide valuable benchmark data for correlating (1)J(AgN) couplings and Ag-109 chemical shifts with structural information."],["dc.description.sponsorship","Fonds der Chemischen Industrie"],["dc.identifier.doi","10.1021/om800487e"],["dc.identifier.isi","000259604200043"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/53140"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Chemical Soc"],["dc.relation.issn","0276-7333"],["dc.title","Combining pyrazolate and N-heterocyclic carbene coordination motifs: Synthesis and characterization of a double-crowned silver complex"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]