Products Cited in Publications Worldwide Binding polyprotic small molecules with second-sphere hydrogen bonds

Binding polyprotic small molecules with second-sphere hydrogen bonds

Hern, Morgan; Foley, Rebecca; Bacsa, John; Wallen, Christian M.

DOI:

Abstract

Second-sphere hydrogen bonds are known for playing significant roles in homogeneous catalysis and in biol. processes with metal-containing mols. In this work, the authors highlight a tetradentate asym. ether-sulfonamidate ligand that facilitates second-sphere hydrogen bonding in transition metal complexes. We explored its ability to bind mono-, di-, tri-, and tetra-protic ligands when supporting a cobalt(II) ion. The structures of three such cobalt complexes containing bound water, ammonia, and hydrazine are presented. Addnl., spectroscopic anal. of a strongly bound hydroxide ion complex is presented. A hydrogen-bonding configuration, not yet observed in crystal structures of this type, resulted in a bridging hydrazine complex with the two cobalt ions separated by a distance of 5 Å.

Keywords

Cobalt ; hydrogen-bonding ; second-sphere ; small molecule ; protic ligand

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