Abstract
The reactions between dirhodium- μ-dichloro-tetraethylene and the 2,3-dihydro-1,3-diborole derivatives 1a, b in toluene and benzene yield the sandwich complexes 3a– c and 4a, b. Their compositions have been derived from spectroscopic and analytical data and were confirmed by single crystal structure analyses for 3a, b, c and for 4b. On heating, these compounds lose the arene ligand and the remaining complex fragments undergo stacking with formation of triple-decker complexes ( 6a, b) and a tetradecker complex ( 7b). Thermogravimetric analyses of 3 and 4 indicate that the decomposition occurs in two steps: the first represents the elimination of the arene and the second the thermal decomposition of the residue.
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