About: Speciation Behavior of Copper( II) Acetate in Simple Organic Solvents

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1002/ejic.201400036
Description	Copper(II) acetate is frequently used as a catalyst for bond-forming reactions in organic synthesis. Unlike aqueous solutions, in which complete heterolysis to CuOAc+(aq) and AcO-(aq) prevails at low concentrations, it is clear that copper(II) acetate shows a large degree of aggregation in typical organic solvents. Here, the speciation behavior of Cu(OAc)(2) in organic solvents is probed by electrospray ionization mass spectrometry (ESI-MS), which reveals an extensive clustering of copper acetate species to form ions of the general composition [Cu-n(X)(2n-1)](+) and [Cu-n(X)(2n+1)](-) (X = OAc and OCH3), along with (solvated) monomeric species such as [Cu(OAc)(CH3OH)(n)](+). The ESI-MS measurements are complemented by solution-phase studies of Cu(OAc)(2) by electron paramagnetic resonance spectroscopy, which support an extensive aggregation of Cu(OAc)(2) in organic solvents. Collisional experiments reveal that either simple degradation or redox processes can be observed, depending on the coordinative saturation of the copper clusters. The formation of the copper clusters can be efficiently suppressed by contamination of the organic solvents by a small amount of water. Copper(II) acetate is frequently used as a catalyst for bond-forming reactions in organic synthesis. Unlike aqueous solutions, in which complete heterolysis to CuOAc+(aq) and AcO-(aq) prevails at low concentrations, it is clear that copper(II) acetate shows a large degree of aggregation in typical organic solvents. Here, the speciation behavior of Cu(OAc)(2) in organic solvents is probed by electrospray ionization mass spectrometry (ESI-MS), which reveals an extensive clustering of copper acetate species to form ions of the general composition [Cu-n(X)(2n-1)](+) and [Cu-n(X)(2n+1)](-) (X = OAc and OCH3), along with (solvated) monomeric species such as [Cu(OAc)(CH3OH)(n)](+). The ESI-MS measurements are complemented by solution-phase studies of Cu(OAc)(2) by electron paramagnetic resonance spectroscopy, which support an extensive aggregation of Cu(OAc)(2) in organic solvents. Collisional experiments reveal that either simple degradation or redox processes can be observed, depending on the coordinative saturation of the copper clusters. The formation of the copper clusters can be efficiently suppressed by contamination of the organic solvents by a small amount of water. (en)
Title	Speciation Behavior of Copper( II) Acetate in Simple Organic Solvents - Revealing the Effect of Trace Water Speciation Behavior of Copper( II) Acetate in Simple Organic Solvents - Revealing the Effect of Trace Water (en)
skos:prefLabel	Speciation Behavior of Copper( II) Acetate in Simple Organic Solvents - Revealing the Effect of Trace Water Speciation Behavior of Copper( II) Acetate in Simple Organic Solvents - Revealing the Effect of Trace Water (en)
skos:notation	RIV/00216208:11310/14:10271750!RIV15-MSM-11310___
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP207/11/0338)
http://linked.open...iv/cisloPeriodika	8
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Roithová, Jana Tsybizova, Alexandra
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	46451
http://linked.open...ai/riv/idVysledku	RIV/00216208:11310/14:10271750
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	electrospray ionization; EPR spectroscopy; mass spectrometry; copper; solvent effects (en)
http://linked.open.../riv/klicoveSlovo	copper electrospray ionization mass spectrometry EPR spectroscopy solvent effects
http://linked.open...odStatuVydavatele	DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV	[9AFF809FFFEC]
http://linked.open...i/riv/nazevZdroje	European Journal of Inorganic Chemistry
http://linked.open...in/vavai/riv/obor	CA
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Reaction mechanisms in organometallic chemistry
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	neuveden
http://linked.open...iv/tvurceVysledku	Schröder, Detlef Roithová, Jana Tsybizova, Alexandra Tsierkezos, Nikos Ryland, Bradford L. Stahl, Shannon S.
http://linked.open...ain/vavai/riv/wos	000333445600018
issn	1434-1948
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1002/ejic.201400036
http://localhost/t...ganizacniJednotka	11310

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