Titanium complexes incorporating byclcic guanidinate ligands. Structure of a novel titanium-aluminium complex

摘要

Synthetic routes to titanium complexes incorporating the bicyclic guanidinate, 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidinate, [hpp]~-, are described; the first example of a chelating coordination mode for the [hpp]~- anion and the trimetallic ocmplex [Me_2Al(hpp)_2TiCl_2·AlMe_3] eontaining [hpp]~- ligands that chelate to titanium and, in addition, bridge to anAlMe_2 unit via nitrogen are reported