In the mol-ecule of the title compound, C(15)H(15)NO(2), the aromatic rings are oriented at a dihedral angle of 15.46 (6)°. An intra-molecular O-H⋯N hydrogen bond results in the formation of a nearly planar six-membered ring [maximum deviation of 0.035 (5) Å for the N atom] which is almost coplanar with the adjacent ring, making a dihedral angle of 0.8 (3)°. The title organic mol-ecule is a phenol-imine tautomer, as evidenced by the C-O, C-N and C-C bond lengths. Mol-ecules are linked by inter-molecular C-H⋯O hydrogen bonds that generate a C(5) chain. C-H⋯π and π-π inter-actions exist in the structure. The π-π inter-action occurs between the phenol ring and its symmetry equivalent at (1 - x, 1 - y, -z), with a centroid-centroid distance of 3.727 (7) Å and a plane-to-plane separation of 3.383 (5) Å, resulting in an offset angle of 24.82 (1)°.
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http://dx.doi.org/10.1107/S1600536809009192 | DOI Listing |
Chem Asian J
January 2025
Department of Chemistry, University at Albany, State University of New York, Albany, NY, 12222, USA.
The two-fold reduction of tetrabenzo[a,c,e,g]cyclooctatetraene (TBCOT, or tetraphenylene, 1) with K, Rb, and Cs metals reveals a distinctive core transformation pathway: a newly formed C-C bond converts the central eight-membered ring into a twisted core with two fused five-membered rings. This C-C bond of 1.589(3)-1.
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January 2025
Applied Systems Analysis & Research, Sandia National Laboratories, Albuquerque, New Mexico 87123, United States.
Salt formations have been explored for the permanent isolation of spent nuclear fuel based on their high thermal conductivity, self-healing nature, and low hydraulic permeability to brine flow. Vacancy defect concentrations in salt complicate fracture mechanics not driven by dislocation dynamics and can influence the resulting surface structure. Classical molecular dynamic simulations were used to simulate tensile testing of salt crystals (halite) with vacancy defect concentrations of up to 0.
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December 2024
University of Mainz, Department of Chemistry, Duesbergweg 10-14, 55099 Mainz, Germany.
The title compound CHClN, also named as TRAM-34, crystallizes in the monoclinic space group 2/n. The dihedral angles between the pyrazole ring and the three six-membered rings are 62.28 (9), 69.
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December 2024
School of Chemistry and Physics, University of KwaZulu-Natal, Private Bag X54001, Durban, 4000, South Africa.
The cation of the title salt, CHNO ·Br, has a dihedral angle of 24.26 (6)° between its fused imidazole and 4-nitro-phenyl rings and the N-C-C-O torsion angle associated with the hy-droxy-ethyl substituent is 60.15 (17)°.
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December 2024
EaStCHEM School of Chemistry, University of St Andrews, St Andrews, Fife KY16 9ST, United Kingdom.
In the title compound, CHNO the pyrrolidine ring is almost planar and subtends a dihedral angle of 85.77 (7)° with the pendant phenyl ring. An intra-molecular N-H⋯O hydrogen bond generates an (6) loop.
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