|
|||||
|
|
Facile and stereoselective condensation of acetone with ammonia ligands on cobalt(III): structure of a N-bonded cyanate complex containing the 2-methyl-2-amino-4-imino-pentane ligand |
|
| Authors: | David P Fairlie Matthew Turner Karl A Byriel Josephine A McKeon WGregory Jackson |
| Institution: | a 3D Centre, University of Queensland, Brisbane, Qld. 4072, Australia b Department of Chemistry, University of Queensland, Brisbane, Qld. 7042, Australia c University of New South Wales, University College, School of Chemistry, Australian Defence Force Academy, Northcott Drive, Canberra, ACT 2600, Australia |
| Abstract: | The complex (NH3)5CoO3SCF3](CF3SO3)2 reacts with excess NaNCO in warm acetone solution to give, stereoselectively, a Schiff base complex (40%) which has been characterized by standard NMR techniques as one of the six isomers of Co{NH2C(CH3)2CH2C(CH3)=NH}2(NH3)NCO](ClO4)2 · H2O, confirmed by a single crystal X-ray structural analysis. Schiff base formation in non-basic conditions for kinetically inert Co(III) complexes is unprecedented. Also, this is only the second cyanate complex of pentaaminecobalt(III) to be structurally characterized (CoNCO: Co–N, 1.908 Å; N–C, 1.152 Å; C–O, 1.206 Å; Co–N–C, 170°; N–C–O, 177°). |
| Keywords: | Crystal structures Cobalt complexes Schiff base complexes |
| 本文献已被 ScienceDirect 等数据库收录！ | |