Reference of 1038-95-5, 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. 1038-95-5, C21H21P. A document type is Article, introducing its new discovery.
The new difluorophosphoranes Ph(o-Tol)2PF2 (1), Mes3PF2 (2), Ph(1-Np)2PF2 (3), (o-Tol)3PF2, (p-Tol)3PF2, Ph(t-Bu)2PF2, and (Ph2PF2)2CH2 containing bulky substituents were prepared by the fluorination reaction of precursor organophosphines with dimethylaminosulfur trifluoride.They were characterized by 1H, 31P, and 19F NMR spectra.The molecular structures of 1-3 revealed trigonal bipyramidal geometries.Comparison of the structural data with that of isoelectronic anionic fluorosilicates along with the NMR data suggest the operation of a steric effect that increases bond lengths in the difluorophosphoranes 1-3 and in related anionic silicates.The data are discussed relative to enhanced reactivity observed for anionic silicates. 1 cryatallizes in the monoclinic space group C2/c with a = 11.819(3) Angstroem, b = 10.163(2) Angstroem, c = 13.992 Angstroem, beta = 99.14(2) deg, and Z = 4. 2 crystallizes in the monoclonic space group C2/c with a = 10.531(2) Angstroem, b = 12.667(2) Angstroem, c = 18.110(4) Angstroem, beta = 104.21(2) deg, and Z = 4. 3 crystallizes in the monoclinic space group P21/c with a = 15.868(2) Angstroem, b = 7.434(1) Angstroem, c = 18.213(4) Angstroem, beta = 112.34(2) deg, and Z = 4.The final conventional unweighted residuals are 0.063 (1), 0.060 (2), and 0.040 (3).Key words: Difluorophosphoranes, anionic fluorosilicates, x-ray structures, NMR spectra
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Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate