Results 81 to 90 of about 19,276 (249)

Synthesis, crystal structure and Hirshfeld surface analysis of tert-butyl N-acetylcarbamate

open access: yesActa Crystallographica Section E Crystallographic Communications, 2022
This article reports a practical synthesis of tert-butyl acetylcarbamate, C7H13NO3, from N-Boc-thioacetamide and the study of its crystal structure. The reaction proceeds in the presence of natural phosphate as a catalyst, with excellent yield, simple workup and benign environment.
El Mestehdi, Aly Dawa   +7 more
openaire   +3 more sources

Halogen‐Bond Coupled Halogenated‐π‐Conjugation Enables Giant Birefringence in Hydrogen‐Bonded Organic Frameworks

open access: yesAdvanced Science, EarlyView.
The perfect crystal packing achieved via the halogen‐bond (XB) coupled halogenated‐π‐conjugation strategy effectively induces an ultrahigh birefringence (Δn = 0.97), which exhibits promising potential in polarization control and phase modulation.
Miao‐Bin Xu   +6 more
wiley   +1 more source

Hirshfeld Surface Investigation of Structure-Directing Interactions within Dipicolinic Acid Derivatives

open access: yesCrystal Growth & Design, 2015
Six compounds based on dipicolinic acid esters have been synthesized and Hirshfeld surfaces used to investigate the structure-directing effects of functional groups in controlling their solid-state behavior. Compounds 1-4 are 4-bromo dipicolinic acid esters substituted with methyl, ethyl, propyl, and benzyl groups, respectively.
Martin, AD   +5 more
openaire   +4 more sources

Structural characterization and Hirshfeld surface analysis of a CoII complex with imidazo[1,2-a]pyridine

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2018
A new mononuclear tetrahedral CoII complex, dichloridobis(imidazo[1,2-a]pyridine-κN1)cobalt(II), [CoCl2(C7H6N2)2], has been synthesized using a bioactive imidazopyridine ligand.
Saikat Kumar Seth
doaj   +1 more source

Dual‐State Photophysical Modulation via Bifurcated Hydrogen Bonding in a U‐Shaped Dipyridophenazine‐Cored Donor‐π‐Acceptor‐π‐Donor Fluorophore

open access: yesChemistry – A European Journal, EarlyView.
A donor–π–acceptor–π–donor (D–π–A–π–D) fluorophore bearing a U‐shaped dipyridophenazine core forms bifurcated hydrogen bonds with neutral donors such as sulfonamides or water. This interaction modulates both ground and excited states, enabling red‐shifted emission and enhanced photoluminescence in solution and solid state.
Kimiya Takei   +7 more
wiley   +1 more source

Methyl 5-chloro-4-hydroxy-2,2-dioxo-1H-2λ6,1-benzothiazine-3-carboxylate: structure and Hirshfeld surface analysis

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2020
The title compound, C10H8ClNO5S, which has potential analgesic activity, crystallizes in space group P21/n. The benzothiazine ring system adopts an intermediate form between sofa and twist-boat conformations.
Svitlana V. Shishkina   +4 more
doaj   +1 more source

Synthesis, Structural Characterization, and Biological Evaluation of (E)-N-(4-Bromobenzylidene)-3-Methoxybenzohydrazide Monohydrate

open access: yesSubstantia, 2023
Synthesis and structural elucidation of a new type of hydrazone Schiff base (E)-N’-(4-Bromobenzylidene)-3-Methoxybenzohydrazide Monohydrate, and its structure were characterized by FT-IR, 1H, 13C NMR and mass spectroscopic analysis.
Kumar Ananthi   +3 more
doaj   +1 more source

Doping of Graphene Nanoribbons via Functional Group Edge Modification

open access: yes, 2017
We report on the on-surface synthesis of 7 armchair graphene nanoribbons (7-AGNRs) substituted with nitrile (CN) functional groups. The CN groups are attached to the GNR backbone by modifying the 7-AGNR precursor.
Abadia, Mikel   +11 more
core   +1 more source

Distribution of Caustic-Crossing Intervals for Galactic Binary-Lens Microlensing Events [PDF]

open access: yes, 1999
Detection of caustic crossings of binary-lens gravitational microlensing events is important because by detecting them one can obtain useful information both about the lens and source star.
Han, Cheongho   +2 more
core   +2 more sources

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