PUMA publications for /tag/activity;nickelhttps://puma.ub.uni-stuttgart.de/tag/activity;nickelPUMA RSS feed for /tag/activity;nickel2024-03-30T09:10:43+01:00Correlated Coordination and Redox Activity of a Hemilabile Noninnocent Ligand in Nickel Complexeshttps://puma.ub.uni-stuttgart.de/bibtex/256029d8f4b99c839b5907fb3d7a5976b/b_schwederskib_schwederski2019-07-15T13:41:23+02:00nickel complex;hemilabile crystal complex methylthiomethylphenyl iminobenzoquinone activity;nickel redox spectroelectrochem ligand structure noninnocent electronic prepn <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Alexa Paretzki" itemprop="url" href="/person/1a6439a064d510f83184c459c883aadd7/author/0"><span itemprop="name">A. Paretzki</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Martina Bubrin" itemprop="url" href="/person/1a6439a064d510f83184c459c883aadd7/author/1"><span itemprop="name">M. Bubrin</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Fiedler" itemprop="url" href="/person/1a6439a064d510f83184c459c883aadd7/author/2"><span itemprop="name">J. Fiedler</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Stanislav Zalis" itemprop="url" href="/person/1a6439a064d510f83184c459c883aadd7/author/3"><span itemprop="name">S. Zalis</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/1a6439a064d510f83184c459c883aadd7/author/4"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Chemistry - A European Journal</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">20 </span></span>(<span itemprop="issueNumber">18</span>):
<span itemprop="pagination">5414--5422</span></em> </span>(<em><span>2014<meta content="2014" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Chemistry - A European Journal185414--5422Correlated Coordination and Redox Activity of a Hemilabile Noninnocent Ligand in Nickel Complexes202014nickel complex;hemilabile crystal complex methylthiomethylphenyl iminobenzoquinone activity;nickel redox spectroelectrochem ligand structure noninnocent electronic prepn [Ni(QM)2], QM = 4,6-di-tert-butyl-N-(2-methylthiomethylphenyl)-o-iminobenzoquinone, is a singlet diradical species with approx. planar configuration at the tetracoordinate metal atom and without any Ni-S bonding interaction. One-electron oxidn. results in addnl. 2-fold Ni-S coordination (dNi-S$\approx$2.38 {\AA}) to produce a complex cation of [Ni(QM)2](PF6) with hexacoordinate NiII and two distinctly different mer-configurated tridentate ligands. The O,O'-trans arrangement in the neutral precursor is changed to an O,O'-cis configuration in the cation. The EPR signal of [Ni(QM)2](PF6) has a very large g anisotropy and the magnetic measurements indicate an S = 3/2 state. The dication was structurally characterized as [Ni(QM)2](ClO4)2 to exhibit a similar NiN2O2S2 framework as the monocation. However, the two tridentate (O,N,S) ligands are now equiv. according to [NiII(QM0)2]2+. Cyclic voltammetry reflects the qual. structure change on the 1st, but not the 2nd oxidn. of [Ni(QM)2], and spectroelectrochem. reveals a pronounced dependence of the 800-900 nm absorption on the solvent and counterion. Redn. of the neutral form occurs in an electrochem. reversible step to yield an anion with an intense near-IR absorption at 1345 nm (\textgreek{e} = 10400 M-1 cm-1) and a conventional g factor splitting for a largely metal-based spin (S = 1/2 ), suggesting a [(QM.-)NiII(QM2-)]- configuration with a tetracoordinate metal atom with antiferromagnetic NiII-(QM.-) interactions and symmetry-allowed ligand-to-ligand intervalence charge transfer (LLIVCT). Calcns. were used to understand the Ni-S binding activity as induced by remote electron transfer at the iminobenzoquinone redox system. [on SciFinder(R)]Correlated Coordination and Redox Activity of a Hemilabile Noninnocent Ligand in Nickel Complexeshttps://puma.ub.uni-stuttgart.de/bibtex/256029d8f4b99c839b5907fb3d7a5976b/huebleriachuebleriac2022-06-15T11:26:56+02:00nickel complex;hemilabile crystal complex methylthiomethylphenyl iminobenzoquinone activity;nickel redox spectroelectrochem ligand structure noninnocent electronic prepn <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Alexa Paretzki" itemprop="url" href="/person/1a6439a064d510f83184c459c883aadd7/author/0"><span itemprop="name">A. Paretzki</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Martina Bubrin" itemprop="url" href="/person/1a6439a064d510f83184c459c883aadd7/author/1"><span itemprop="name">M. Bubrin</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Fiedler" itemprop="url" href="/person/1a6439a064d510f83184c459c883aadd7/author/2"><span itemprop="name">J. Fiedler</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Stanislav Zalis" itemprop="url" href="/person/1a6439a064d510f83184c459c883aadd7/author/3"><span itemprop="name">S. Zalis</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/1a6439a064d510f83184c459c883aadd7/author/4"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Chemistry - A European Journal</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">20 </span></span>(<span itemprop="issueNumber">18</span>):
<span itemprop="pagination">5414--5422</span></em> </span>(<em><span>2014<meta content="2014" itemprop="datePublished"/></span></em>)</span>Wed Jun 15 11:26:56 CEST 2022Chemistry - A European Journal185414--5422Correlated Coordination and Redox Activity of a Hemilabile Noninnocent Ligand in Nickel Complexes202014nickel complex;hemilabile crystal complex methylthiomethylphenyl iminobenzoquinone activity;nickel redox spectroelectrochem ligand structure noninnocent electronic prepn [Ni(QM)2], QM = 4,6-di-tert-butyl-N-(2-methylthiomethylphenyl)-o-iminobenzoquinone, is a singlet diradical species with approx. planar configuration at the tetracoordinate metal atom and without any Ni-S bonding interaction. One-electron oxidn. results in addnl. 2-fold Ni-S coordination (dNi-S$\approx$2.38 {\AA}) to produce a complex cation of [Ni(QM)2](PF6) with hexacoordinate NiII and two distinctly different mer-configurated tridentate ligands. The O,O'-trans arrangement in the neutral precursor is changed to an O,O'-cis configuration in the cation. The EPR signal of [Ni(QM)2](PF6) has a very large g anisotropy and the magnetic measurements indicate an S = 3/2 state. The dication was structurally characterized as [Ni(QM)2](ClO4)2 to exhibit a similar NiN2O2S2 framework as the monocation. However, the two tridentate (O,N,S) ligands are now equiv. according to [NiII(QM0)2]2+. Cyclic voltammetry reflects the qual. structure change on the 1st, but not the 2nd oxidn. of [Ni(QM)2], and spectroelectrochem. reveals a pronounced dependence of the 800-900 nm absorption on the solvent and counterion. Redn. of the neutral form occurs in an electrochem. reversible step to yield an anion with an intense near-IR absorption at 1345 nm (\textgreek{e} = 10400 M-1 cm-1) and a conventional g factor splitting for a largely metal-based spin (S = 1/2 ), suggesting a [(QM.-)NiII(QM2-)]- configuration with a tetracoordinate metal atom with antiferromagnetic NiII-(QM.-) interactions and symmetry-allowed ligand-to-ligand intervalence charge transfer (LLIVCT). Calcns. were used to understand the Ni-S binding activity as induced by remote electron transfer at the iminobenzoquinone redox system. [on SciFinder(R)]