Structural analysis of some benzoxazoles containing strong electron donor-acceptor groups
Abstract
The crystal structure analysis of two benzoxazole containing molecules is reported: 2-[4-N,N-bis(2-hydroxyethyl)]phenyl-6-nitrobenzoxazole monohydrate (1) and 2-[4-N-(6-hydroxyhexyl)-/N-methyl] phenyl-6-nitrobenzoxazole (2). These compounds are monomer precursors of polymers with nonlinear optical properties of the second order. The crystal structures have been determined at room temperature by direct methods and refined by full-matrix least-squares method. Some differences have been found in the molecular geometry of 1 and 2 as compared to published data on similar benzoxazole containing compounds. These differences are due to the strong electron donor effect of the amino group and indicate enhanced conjugation in the molecules. The pattern of hydrogen bonding in the two compounds is also discussed.
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- Combination of α-NbOPO4 type layers with enantiomorphic α′-type layers: the “racemic structure” of α-α′-Nb0.787W0.213OPO4
- Synthese und Kristallstruktur von Mo7Sn12Zn40 – einer kubischen Verbindung mit Ikosaedern aus Ikosaedern
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- Crystal structures of α and β modifications of trichlorophosphazo-N-sulfurylchloride Cl3PNSO2Cl
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