An unusual reaction of Me3Al with the macrobicyclic ligand C22H28N2O3 (C22H28N2O31,15-diaza-3,4:12,13-dibenzo-5,8,11-trioxabicyclo[13,3,1]nonadecane)
摘要:
The reaction of AlMe3 with the macrobicyclic ligand 1,15-diaza-3,4:12,13-dibenzo-5,8,11-trioxabicyclo[13,3,1]nonadecane (C22H28N2O3) in a 4:1 ratio in the presence of a trace of water resulted in the formation of a novel tetranuclear organoaluminum complex (Me3Al)(C22H28N2O3)(AlMe2)(2)(AlMe3)(mu(3)-O) in a nearly quantitative yield. The complex has been characterized by H-1-NMR, EI mass spectra and elemental analyses. A single crystal X-ray diffraction study reveals a mu(3)-oxygen atom bridging three different alkyl aluminum centers in a trigonal planar geometry, and the fourth aluminum center is bonded to the ether oxygen of the macrobicycle with a dative bond length. (C) 1999 Elsevier Science S.A. All rights reserved.