Synthesis of the dimeric μ2-O aminoalkoxy complexes of rhenium [(CO)3Re(μ2-O∩NH2)]2 and their condensation products with acetone [(CO)3Re(μ2-O∩N=CMe2)]2

The allyl rhenium complex Re(CO)4(η3-C3H5) (1) reacts with the amino alcohols 2-amino ethanol, 1-amino-propane-2-ol, 2-amino phenol and 2-amino benzyl alcohol (2a–d) to give the dimeric μ2-O-bridged tricyclic aminoalkoxy complexes of rhenium of the type [(CO)3Re(μ2-O∩NH2)]2 (3a–d). The acidic NH2 ligand undergoes a condensation reaction with acetone at r.t. forming the corresponding ketimine complexes [(CO)3Re(μ2-O∩N=CMe2)]2 (4a–d). The compounds have been characterized by spectroscopic (IR, NMR, MS), analytical (C, H, N) and X-ray diffraction analyses (4a–d).