Reaction of 4-methyl-pyridine -oxide and Co(NCS) in ethanol as solvent accidentally leads to the formation of single crystals of Co(NCS)(4-methyl-pyridine -oxide)(ethanol) or [Co(NCS)(CHNO)(CHO)] . The asymmetric unit of the title compound consists of one Co cation, two crystallographically independent thio-cyanate anions, one 4-methyl-pyridine -oxide coligand and one ethanol mol-ecule on general positions. The cobalt cations are sixfold coordinated by one terminal and two bridging thio-cyanate anions, two bridging 4-methyl-pyridine -oxide coligands and one ethanol mol-ecule, with a slightly distorted octa-hedral geometry. The cobalt cations are linked by single μ-1,3(,)-bridging thio-cyanate anions into corrugated chains, that are further connected into layers by pairs of μ-1,1(,)-bridging 4-methyl-pyridine -oxide coligands. The layers are parallel to the plane and are separated by the methyl groups of the 4-methyl-pyridine -oxide coligands. Within the layers, intra-layer hydrogen bonding is observed.
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http://dx.doi.org/10.1107/S2056989024009058 | DOI Listing |
Acta Crystallogr E Crystallogr Commun
September 2024
Institut für Anorganische Chemie, Universität Kiel, Germany.
Reaction of 4-methyl-pyridine -oxide and Co(NCS) in ethanol as solvent accidentally leads to the formation of single crystals of Co(NCS)(4-methyl-pyridine -oxide)(ethanol) or [Co(NCS)(CHNO)(CHO)] . The asymmetric unit of the title compound consists of one Co cation, two crystallographically independent thio-cyanate anions, one 4-methyl-pyridine -oxide coligand and one ethanol mol-ecule on general positions. The cobalt cations are sixfold coordinated by one terminal and two bridging thio-cyanate anions, two bridging 4-methyl-pyridine -oxide coligands and one ethanol mol-ecule, with a slightly distorted octa-hedral geometry.
View Article and Find Full Text PDFSmall
November 2024
Research Institute for Sustainable Energy, Center for Research and Education in Science and Technology (TCG-CREST), Salt Lake, Kolkata, 700091, India.
Application of an aqueous Zn-ion battery is plagued by a water-induced hydrogen evolution reaction (HER), resulting in local pH variations and an unstable electrode-electrolyte interface (EEI) with uncontrolled Zn plating and side reactions. Here, 4-methyl pyridine N-oxide (PNO) is introduced as a redox non-innocent additive that comprises a hydrophilic bipolar N-O ion pair as a coordinating ligand for Zn and a hydrophobic ─CH group at the para position of the pyridine ring that reduces water activity at the EEI, thereby enhancing stability. The N-O moiety of PNO possesses the unique functionality of an efficient push electron donor and pull electron acceptor, thus maintaining the desired pH during charging/discharging.
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
April 2024
Institut für Anorganische Chemie, Universität Kiel, Germany.
Reaction of Co(NCS) with 4-methyl-pyridine -oxide in methanol leads to the formation of crystals of the title compound, [Co(NCS)(CHNO)(CHO)] or Co(NCS)(4-methyl-pyridine -oxide)(methanol). The asymmetric unit consist of one Co cation, two thio-cyanate anions, two 4-methyl-pyridine -oxide coligands and one methanol mol-ecule in general positions. The H atoms of one of the methyl groups are disordered and were refined using a split model.
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
February 2024
Institut für Anorganische Chemie, Universität Kiel, Germany.
The reaction of Co(NCS) with 4-methyl-pyridine -oxide (CHNO) leads to the formation of two compounds, namely, tetra-kis-(4-methyl-pyridine -oxide-κ)bis-(thio-cyanato-κ)cobalt(II), [Co(NCS)(CHNO)] (), and tris-(4-methyl-pyridine -oxide-κ)bis-(thio-cyanato-κ)cobalt(II), [Co(NCS)(CHNO)] (). The asymmetric unit of consists of one Co cation located on a centre of inversion, as well as one thio-cyanate anion and two 4-methyl-pyridine -oxide coligands in general positions. The Co cations are octa-hedrally coordinated by two terminal -bonding thio-cyanate anions in positions and four 4-methyl-pyridine -oxide ligands.
View Article and Find Full Text PDFActa Crystallogr E Crystallogr Commun
February 2021
Institute of Chemistry of New Materials, University of Osnabrück, Barbarastr. 7, 49069 Osnabrück, Germany.
In the solid-state structures of -poly[[di-chlorido-tin(II)]-μ-(4-methyl-pyridine -oxide)-κ :], [SnCl(CHNO)] , , and di-chlorido-bis-(4-methyl-pyridine -oxide-κ)tin(II), [SnCl(CHNO)], , the bivalent tin atoms reveal a seesaw coordination with both chlorine atoms in equatorial and the Lewis base mol-ecules in axial positions. While the Sn-Cl distances are almost identical, the Sn-O distances vary significantly as a result of the different bonding modes (μ for , μ for ) of the 4-methyl-pyridin--oxide mol-ecules, giving rise to a one-dimensional coordination polymer for the 1:1 adduct, , and a mol-ecular structure for the 1:2 adduct, . The different coordination modes also influence the bonding parameters within the almost planar ligand mol-ecules, mostly expressed in N-O-bond lengthening and endocyclic bond-angle widening at the nitro-gen atoms.
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