Department of Chemistry, Central China Normal University
○Li Wang

α-Amino acids are interesting biological ligands with multiple functional groups, which display variant coordination modes under different chemical environment.^[1] The studies of silver(I) complexes have been mostly related to their antiethylene and antimicrobial activities.^[2]
Two novel polymeric silver(I) complexes, namely [Ag(L-phenylalaninato)]_n 1 and {[Ag (L-argininato)]NO₃^-}_n 2 have been synthesized and structurally characterized by x-ray crystallography. The compound 1 is a one-dimension polymer along the [100] direction, with the Ag (I) cation coordinated by one carboxylate oxygen atom of the L-Phenylalanine ligand and one amido nitrogen atom from the other asymmetric unit {Ag--N=2.146(8) Å and Ag--O=2.148(9) Å }. In compound 2, Ag(I) is also two-coordinated by one amino N atom of the L-Arginine ligand, one O atom of another carbonyl group L-Arginine ligand{ Ag--O and Ag--N are 2.147(2) Å and 2.156(3) Å}, the N-Ag-O bonding units are repeated.

References
1 O. Yamauchi, A. Odani and M. Takani, J. Chem. Soc., Dalton Trans., 2002, 3411.
2 K. Nomiya and H. Yokoyama, J. Chem. Soc., Dalton Trans., 2002, 2483.