Stoichiometric and Structural Diversity of Silver Hydroxymethylacetylenide Coordination Polymers

Addition of in situ generated hydroxymethylacetylenide (terminal C-deprotonated propargylic alcohol, prop-2-yn-1-ol, C3H3OH) to aqueous solutions of AgNO(3)in 1:1 molar ratio results in the formation of two new coordination polymers, {AgNO3 center dot 2[Ag(C3H2OH)]center dot(2)/3H2O}(infinity)(1) and {AgNO3 center dot 3Ag(C3H2OH)}(infinity)(2). Storage of crystalline samples of1or2under mother liquor at 5 degrees C for two weeks results in a new crystalline phase, {AgNO3 center dot 2[Ag(C3H2OH)]center dot H2O}(infinity)(3). Another two weeks evolution yields {AgNO3 center dot 2Ag(C3H2OH)}(infinity)(4). This product can be prepared in high scale by changing the reagent ratio between the hydroxymethylacetylenide and AgNO(3)to 0.5:1. All products are colorless crystalline materials, and their structures were determined by single-crystal X-ray diffraction. They are highly light sensitive, in particular, in the presence of trace amounts of impurities.