Abstract
Flexible dimers 1, 2, and 3 of “pyrazole” derivatives linked with propylene spacer are synthesized and conformational stability in solid, solution, and gaseous states is studied through single crystal X-ray diffraction, 2D NOESY ,and DFT, respectively. The folded conformation of compound 2 is stable in all three states and X-ray diffraction evince that molecule is intramolecularly stacked in reverse face-to-face manner. TEM image of compound 2 exhibits rigid hollow nanospikes with high tendency to form agglomerates.
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Acknowledgments
AKT acknowledge DST India Grant no. SR/S1/OC-42/2012 for financial assistance. Department of Chemistry and Department of Anatomy (IMS), Banaras Hindu University, Varanasi, India are acknowledged for departmental facilities and TEM facility respectively. We thanks to Prof. O. N. Shrivastava Department of Physics, BHU for interpreting the TEM results. SKR also acknowledges to CSIR-New Delhi for SRF.
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Rai, S.K., Srivastava, P., Gupta, H. et al. Unusual reverse face-to-face stacking in propylene linked pyrazole system: perspective of organic materials. Struct Chem 26, 555–563 (2015). https://doi.org/10.1007/s11224-014-0512-5
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DOI: https://doi.org/10.1007/s11224-014-0512-5