Reduction of Nitrous Oxide and Binding of Carbon Dioxide by Acenaphthene-1,2-diimine Aluminum Compounds

The reaction of dialane [(dpp-bian)Al-Al(dpp-bian)] (1) (dpp-bian = 1,2-bis[(2,6-diisopropylphenyl)imino]-acenaphthene) with N2O results in the formation of oxide [(dpp-bian)Al(mu 2-O)2Al(dpp-bian)] (2). The reaction of the thf adduct of 1, [(dpp-bian)(thf)Al-Al(thf)(dpp-bian)] (3), with N2O affords oxo-bridged [(dpp-bian)Al(thf)(mu-O)Al(thf)(dpp-bian)] (4). The addition of carbon dioxide to compound 2 leads to the formation of carbonate [(dpp-bian)Al(mu-O)(mu-CO3)Al(dpp-bian)] (5). Diamag-netic derivatives have been characterized by 1H NMR spectroscopy and paramagnetic compounds by electron paramagnetic resonance spectroscopy; their molecular structures have been established by single-crystal X-ray analysis.