Exo-π-bonding to an ortho-carborane hypercarbon atom: systematic icosahedral cage distortions reflected in the structures of the fluoro-, hydroxy- and amino-carboranes, 1-X-2-Ph-1,2-C2B10H10X F, OH or NH2 and related anionsElectronic supplementary information ESI available: CIF file for five ortho-carborane derivatives. Tables of energies for MP26–31G optimised geometries, selected structural data for the aminocarborane PhCb°NH2and for biscarborane derivatives. See http:www.rsc.orgsuppdatadtb4b406422d

Autor: Boyd, Lynn A., Clegg, William, Copley, Royston C. B., Davidson, Matthew G., Fox, Mark A., Hibbert, Thomas G., Howard, Judith A. K., Mackinnon, Angus, Peace, Richard J., Wade, Kenneth
Zdroj: Dalton Transactions; 2004, Vol. 2004 Issue: 17 p2786-2799, 14p
Abstrakt: The structures of derivatives of phenyl-ortho-carborane bearing on the second cage hypercarbon atom a π-donor substituent F, OH, O−, NH2, NH−and CH2− were investigated by NMR, X-ray crystallography and computational studies. The molecular structures of these compounds, notably their cage C1–C2 distances and the orientations of their π-donor substituents OH, NH2, NH−and CH2− show remarkable and systematic variations with the degree of exoπ-bonding, which varies as expected with the π-donor characteristics of the substituent.
Databáze: Supplemental Index