SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF THE NOVEL COMPOUNDS FROMTHE REACTIONS OF TRIMETHYLALUMINUM OR TRIMETHYLGALLIUM WITH N,O-DONORCROWN-ETHERS

The reactions of two NIO mixed-donor crown ethers, -triaza-3,4:9,10-di benzo-5,8-dioxacycloheptadecane (OenNdienH(4)) and 2-diaza-3,4:9,1O-di benzo-5,8-dioxacyclopentadecane (OenNtnH(4)) with MMe3 (M = Al, Ga) ar e reported. OenNdienH(4) reacted with 3 equiv of AlMe3 to form (AlMe)( AlMe2)(OEnNdienH(4))(AlMe3) (1) which contains three different MenAl g roups: AlMe, AlMe2, AlMe3. OenNtnH(4) reacted with 2 equiv of AlMe3 to afford (AlMe2)(OenNtnH(4))(AlMe3) (2) containing two chemically inequ ivalent aluminum centers. However, the reaction of OenNdienH(4) with G aMe3 in 1:3 ratio resulted in (OenNdienH(4))(2)-(GaMe2OH)(4) (3). The (Me2GaOH)(4) component contains an eight-membered Ga-O ring linked via four hydrogen bonds to two molecules of OenNdienH(4) which interacts from opposite sides of the Ga4O4 ring. The reaction of OenNtnH(4) with GaMe3 in 1:2 ratio produced (OenNtnH(4))(GaMe2OH)(3) (4), a one-dimen sional hydrogen bonded system which incorporates one OenNtnH(4) ligand and one nonplanar six-membered ring with alternating Ga and O atoms ( GaMe2OH)(3).