The chevron-shaped cations of the title hydrated salt, CHN ·2Br·2HO, are arranged in back-to-back alternating directions to form a zigzag ribbon propagating along the [010] direction. Inter-molecular inter-actions comprising these ribbons are π-π inter-actions between the pyridinium and adjacent pyridyl rings, as well as O-H⋯O hydrogen bonding between water molecules and two adjacent pyridyl N atoms. Half of the cation is generated by the mirror plane. The water O atoms, the central C atom and one Br atom are located on this mirror plane while the other Br atom is on a twofold screw axis.
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http://dx.doi.org/10.1107/S2414314622005259 | DOI Listing |
In the hydrated title complex, [Fe(dpa)(N)]·HO (dpa is 2,2'-di-pyridyl-amine, CHN), the Fe ion is coordinated in a distorted octa-hedral manner by two neutral, chelating dpa ligands and two anionic, monodentate azide (N ) ions in a -configuration. Distortion results from different Fe-N bond lengths [2.1397 (13)-2.
View Article and Find Full Text PDFJ Am Chem Soc
September 2024
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, Jiangsu, China.
Controlling the packing of olefinic molecules in crystals is essential for triggering solid-state [2 + 2] photocycloaddition reactions and the synthesis of photocontrolled smart materials. Herein, we report the stepwise photodimerization-triggered photopolymerization of two triene coordination polymers (CPs), {[Zn(2-BBA)(tpeb)]·0.5CHCN} (, 2-HBBA = 2-bromobenzoic acid, tpeb = 1,3,5-tri-4-pyridyl-1,2-ethenylbenzene) and {[Zn(3-BBA)(tpeb)]·CHCN)} (, 3-HBBA = 3-bromobenzoic acid).
View Article and Find Full Text PDFChemistry
November 2024
Department of Chemistry, University of Victoria, 3800 Finnerty Rd., Victoria, BC V8P 5C2, Canada.
Quantitative molecular structure-reactivity models are useful for generating predictions to guide synthesis design, and in formulating and testing mechanistic hypotheses. We report an expanded multivariate linear regression (MLR) model for the rate of (hetero)aryl (pseudo)halide oxidative addition to LPd(0), here exemplified by Pd(PCy). This builds on a prior model from our group, with additional substrate classes (aryl chlorides and iodides) and reaction solvents (THF, toluene, THF/DMF mixture).
View Article and Find Full Text PDFACS Catal
March 2024
Department of Chemistry, University of Michigan, Ann Arbor, MI 48108, USA United States.
Herein, we report a three stranded coiled-coil (3SCC) protein containing a type II copper center (CuT2) composed of 6-membered ring N-heterocycles. This design yields the most active homogenous copper nitrite reductase (CuNiR) mimic in water. We achieved this result by controlling three factors.
View Article and Find Full Text PDFDalton Trans
August 2024
College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211800, P. R. China.
The design of efficient catalysts for photocatalytic CO conversion is of great importance for the sustainable development of society. Herein, three polyoxometalate (POM)-based crystalline materials were formulated prepared by substituting transition metals and adjusting solvent acidity with 2-(2-pyridyl) benzimidazole (pyim) as the light-trapping ligand, namely {[SiWO][Co(pyim)]}·2CHOH (SiW12Co2), {[SiWO][Ni(pyim)]}·2CHOH (SiW12Ni2), and {[SiWO][Mn(pyim)]}·2CHOH (SiW12Mn2). X-ray crystallography diffraction analysis indicates that the three complexes exhibit isostructural properties, and form a stable one-dimensional chain structure stabilized by two [M(pyim)] (M = Co, Ni, and Mn) fragments serving as dual-nodes to the adjacent SiW units.
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