Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. 33100-27-5, C10H20O5. A document type is Article, introducing its new discovery., Computed Properties of C10H20O5
121Sb-Moessbauer-Spectroscopic and Structural Investigations on Crown Ether Complexes SbX3(15-Crown-5) with X=F, Cl, Br, I. A Population Analysis
The crown ether complexes SbX3(15-crown-5) with X=F, Cl, Br, and I have been prepared by reactions of 15-crown-5 with the corresponding antimony trihalides in acetonitrile solutions.The compounds were characterized by IR spectroscopy as well as by 121Sb-Moessbauer spectroscopy .A method of orbital population analysis utilizing both Moessbauer isomer shifts and quadrupole coupling has been developed for Sb(III) antimony halides and their crown ether complexes.SbF3(15-crown-5) was also characterized by an X-ray structure determination: Space group P21/n, Z=4, 3628 observed unique reflexions, R=0.032.Lattice dimensions at 19 deg C: a=891.54(6), b=1277.26(6), c=1277.66(7) pm, beta=95.029(4)0.The complex has a molecular structure in which the antimony atom is surrounded by three F-atoms with mean bond lengths of 192.4 pm and by the five oxygen atoms of the crown ether molecule with mean bond lengths of 293.9 pm.
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Chiral Catalysts,
Chiral catalysts – SlideShare