Dicyanoaurate-based heterobimetallic uranyl coordination polymers

Dalton Transactions : an International Journal of Inorganic Chemistry
Matthew L BrownDaniel B Leznoff

Abstract

The first series of uranyl ([UO2]2+)-dicyanoaurate coordination polymers and molecular complexes has been synthesized. Reactions of [A][Au(CN)2] (A = [nBu4N]+or [(Ph3P)2N]+([PPN])) and uranyl nitrate in alcoholic solvents in ambient light led to [A]2[(UO2)2(μ-η2:η2-O2)(NO3)2(μ-Au(CN)2)2], which incorporates peroxo ligands into a one-dimensional ladder topology with alternating aurophilic and peroxo rungs. Conducting the reaction with non-alcoholic solvents formed two polymorphs of a one-dimensional chain, [PPN][UO2(NO3)2Au(CN)2], from acetone, and a molecular analogue, [PPN]2[UO2(NO3)2(Au(CN)2)2], from acetonitrile, none of which exhibited aurophilic interactions. The addition of 2,2'-bipyridine to the initial reaction resulted in [UO2(bipy)(MeO)(MeOH)]2[(μ-Au(CN)2)(Au(CN)2)], a one-dimensional structure which propagates via a series of linear aurophilic bonds with pendant uranyl complexes; methanol and methoxy ligands provide additional connections through hydrogen bonding. The addition of 5,5'-dimethyl-2,2'-bipyridine using solvothermal conditions resulted in the one-dimensional ladder [UO2(Me2bipy)Au(CN)2]2[(μ-OH)2], generated through aurophilic bonds and hydroxide ligands. The incorporation of 2,2':6',2''-terpyridine (terpy...Continue Reading

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Citations

Sep 22, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Pierre Thuéry, Jack Harrowfield
Oct 3, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Marissa RinggoldJohn G Brennan
Jan 27, 2019·Chemical Communications : Chem Comm·Szymon ChorazyBarbara Sieklucka

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