Silver(I) Coordination Polymers Incorporating Neutral γ-Carbon Bound <i>N</i>,<i>N</i>′-Bis(acetylacetone)alkanediimine Units
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Abstract
Five new silver(I) coordination polymers of types [Ag<sub>2</sub>L<sup>1</sup>(NO<sub>3</sub>)<sub>2</sub>]<sub><i>n</i></sub> (<b>1</b>), [Ag<sub>2</sub>L<sup>2</sup>(NO<sub>3</sub>)<sub>2</sub>]<sub><i>n</i></sub> (<b>2</b>), [Ag<sub>2</sub>L<sup>3</sup>(NO<sub>3</sub>)<sub>2</sub>]<sub><i>n</i></sub> (<b>3</b>), [Ag<sub>2</sub>L<sup>4</sup>(NO<sub>3</sub>)<sub>2</sub>]<sub><i>n</i></sub> (<b>4</b>), and [AgL<sup>5</sup>(NO<sub>3</sub>)]<sub><i>n</i></sub> (<b>5</b>) have been synthesized, where L<sup>1</sup>–L<sup>5</sup> are the Schiff base ligands formed from 2:1 condensation of acetylacetone with the symmetrical diamines H<sub>2</sub>N(CH<sub>2</sub>)<sub><i>n</i></sub>NH<sub>2</sub>, with <i>n</i> = 2 and 6 to give L<sup>1</sup> and L<sup>2</sup>, 1,2-bis(2-aminophenoxy)ethane to give L<sup>3</sup>, 1,4-bis(2-aminophenoxy)butane to give L<sup>4</sup>, and 1,6-bis(4-aminophenoxy)butane to give L<sup>5</sup>. The single crystal X-ray structures of the Ag(I) complexes <b>1</b>–<b>5</b> have been determined. Both <b>1</b> and <b>2</b> adopt three-dimensional polymeric network structures, while <b>3</b>–<b>5</b> adopt two-dimensional-layered framework structures. In <b>1</b> and <b>2</b>, the terminal O and γ-C atoms of two acacH-imine domains of the same ligand bind to different silver ions, while in each of <b>3</b>–<b>5</b> a γ-C from one or both acacH-imine domains binds to a silver ion, with the remaining coordination sites occupied by bridging monodentate or bidentate nitrato groups and/or a Schiff base ligand oxygen donor
