17381-63-4Relevant academic research and scientific papers
Electronic Structure and Bonding in Cyclic B-S and B-Se Compounds Studied by Solid State 11B NMR
Conrady-Pigorsch, R.,Mueller-Warmuth, W.,Schwetlik, G.,Wienkenhoever, M.,Krebs, B.
, p. 453 - 458 (2007/10/02)
Solid state 11B (and in one case 10B) NMR spectra of four cyclic boron-chalcogen compounds have been measured at various frequencies and analysed in terms of nuclear quadrupole and chemical shift interactions.Application of the Townes-Dailey theory to the quadrupole results, corrected for ionic contributions to the electric field gradient and to the bonding, yields detailed information about the importance of ?-bonding in the respective materials.The occupation number of the 2pz orbitals of the sp2-hybridized boron atoms appear to be particularly large for systems containing chalcogen-chalcogen bridges.From both the chemical point of view and the spectroscopic result, among the six- and five-membered rings, diiodotriselenadiborolane is distinguished by an exceptional position.
