In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Orientation effects on C2(5)-C2′(5′) linked bioxazole isomers synthesized via regioselective and sequential C-H arylation, published in 2021-01-31, which mentions a compound: 288-42-6, Name is Oxazole, Molecular C3H3NO, SDS of cas: 288-42-6.
Bis(4-fluorophenyl) substituted oxazole (2,5-Oxz) and C2(5)-C2′(5′) linked bioxazole isomers (C2-C2’_BOxz, C2-C5’_BOxz and C5-C5’_BOxz) (I – IV, resp.) were concisely synthesized via palladium-catalyzed regioselective and sequential C-H arylation in 1-3 reaction steps along with 20%-83% of total yields from oxazole and 4-bromofluorobenzene. The linking orientation plays a key role in the packing geometry and photophys. properties of C2-C2’_BOxz, C2-C5’_BOxz and C5-C5’_BOxz. These bioxazole isomers in solid state showed significant differences in photoluminescence quantum yields (PLQY) (0.33, 0.25 and 0.04, resp.), delayed fluorescence properties and powder X-ray diffraction (PXRD) patterns, suggesting the divergence in intermol. interactions. The theor. calculated gradient isosurfaces and complexation energies indicate the existence of intense π-π interactions between mol. layers, which are in good agreement with the variation trend of optical properties.
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Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem