Figure 2
Four closely related N-coligand structures. The CSD refcodes and associated references are as follows: WUKLEU (Yenikaya et al., 2009), AYOLOP (Altin et al., 2004) and NIBDIM (Uçar et al., 2007). The occupation of the axial positions (light-blue blobs) of the proto-molecule (flat structure built upon tridentate pydc2− and monodentate N-coligand on the left) by water and carboxylate O (pink blobs) and/or amine N (dark-blue blobs) atoms (N,Obridged) are presented from left to right. |