122312-92-9Relevant academic research and scientific papers
(Ligand)Transition Metal ?-Complexes of Organosubstituted 2,5-Dihydro-1,2,5-azasilaboroles - Preparation and Characterization in Solution
Koester, Roland,Seidel, Guenter,Wrackmeyer, Bernd,Schlosser, Dieter
, p. 2055 - 2074 (2007/10/02)
The heterocycles 4, 5, 7, and 5a-η6-Cr(CO)3 react thermally or photochemically with suitable organometallic compounds to form the η4-complexes (OC)4M-4a (M = Cr, Mo), (OC)3Fe-4f, j, the exo/endo compounds (OC)3Fe-4c, 7c,d, CpCo-4h, j, CpCo-5a-η6-Cr(CO)3, endo/exo-CpCo-7c, exo-CpCo-7d, (OC)3Ru-4a, (acac)Rh-4a, 2, and (C2H4)ClIr-4a.The cyclodiastereotopic heterocycles 4c, 7c, and 7d are complexed diastereoselectively at the ligand transition metal fragments. 1η4-3a>2 is obtained from (Na-3a) and 2.Reaction of the vinyl compounds 4b and 5b leads to η4-complexation at the endo-C=C-B=N and/or the exo-C=C-C=C grouping.All ?-complexes are characterized by mass spectrometry and multinuclear NMR spectroscopy (1H, 11B, 13C, 14,15N, 17O, 29 Si, 59Co, 103Rh).Their bondings are discussed on the basis of their NMR data. - Key Words: Transition metal η4-organoboranes / endo/exo-η4-Complexation
