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Gallium−Gallium Bonds as Key Building Blocks for the Formation of Large Organometallic Macrocycles, on the Way to a Mesoporous Molecule

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journal contribution
posted on 05.01.2004, 00:00 by Werner Uhl, Anna-Christina Fick, Thomas Spies, Gertraud Geiseler, Klaus Harms
A macrocyclic gallium carboxylate (3) is formed on reaction of the digallane(4) R2Ga−GaR2 [R = CH(SiMe3)2], 1, with naphthalene-2,6-dicarboxylic acid, HOOC−C10H6−COOH. The macrocycle comprises 44 atoms, and four Ga−Ga single bonds are connected by four dicarboxylato bridges. The cavity of the heterocycle may be described as a rigid molecular square possessing a largest diameter of 1.86 nm. It encloses four 1,2-difluorobenzene molecules.