The MNDO–UHF method has been applied to a large number of organic and inorganic radical species. The obtained results demonstrate that thermodynamical data as well as their equilibrium structures are in reasonable agreement with experimental findings.
DasIminoboran MeB E N M e entsteht bei der Gasphasenthermolyse des Aminoborans Me2BN(SiMe3)OSiMe3 oder des Azi- The iminoborane MeB S N M e is formed by gas-phase thermolysis of the aminoborane Me2BN(SiMe3)OSiMe3 or the azidoborane Me2BN3. The NMR shifts at -8O"C, the IR spectrum in Armatrix, and the PE spectrum correspond to a molecular structure comparable to that of 2-butyne, MeCECMe. The title compound is thermally stabilized by cyclotrimerisation, it is butyloborated at the BN bond by tributylborane, and it adds benzyl azide by a
The He(I) photoelectron (PE) spectra of bis(2,4,6-tri-t-butylphenyl)diphosphene and mesityl(2,4,6-tri-t-butylphenyl)diphosphene are reported. An interpretation based on semiempirical calculations and comparison with other data is suggested.
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