Citation: Ye\,silel, Okan Zafer; G\"unay, G\"une\,s; Darcan, Cihan; Soylu, Mustafa Serkan; Keskin, Seda; Ng, Seik Weng (2012). An unusual 3D metal--organic framework, {[Ag4(\m4-pzdc)2(\m-en)2]·H2O}n: C--H⋯Ag, N--H⋯Ag and (O--H)⋯Ag interactions and an unprecedented coordination mode for pyrazine-2,3-dicarboxylate. CrystEngComm, 14, pp. 2817-.