Abstract: | The reactions of the tetradentate amine-phenol type Schiff bases H2sal2en (1,2-ethylenebis(salicylideneimine) and H2sal2mp (1,2-benzylenebis(salicylideneimine)) with trans-[ReOCl3(PPh3)2] or (n-Bu4N)[ReOCl4] in air gave the products (µ-O)[ReO(sal2en)]2 (1) and [ReOCl(sal2mp)] (2), respectively. X-ray and spectroscopic studies have shown that 1 contains the linear O=Re–O–Re=O grouping, with the four donor atoms of sal2en2? coordinating in the square plane cis to the oxo ions. In 2, a cis oxo-chloro arrangement is observed with a phenolic oxygen being coordinated trans to the oxo group. The terminal Re=O bond lengths in 1 and 2 are 1.709(4) and 1.683(3)?Å, respectively. |