Bis(imido) rhenium complexes bearing C-or N-capped 'tripodal' ligands:Bi-versus tri-dentate ligation

摘要

The differing geometrical constraints of the tripodal ligands tris(hydroxyphenyl)amine (N-cappedH3) and tris(3,5-di-t-Bu-2-hydroxyphenyl)methane (C-cappedH3) led,on reaction with [Re(t-BuN)3(OSiMe3)],to the isolation of the complexes [Re(t-BuN)2(N-capped)] (1) and [Re(OSiMe3Xt-BuN)2(C-cappedH)] (2),respectively.Both l-l/2MeCN and 2 have been structurally characterized using X-ray synchrotron radiation.