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(a) Structure of {[Co3(ndc)(bipyen)1.5]⋅H2O}n. The oxygen atoms of guest water molecules are shown as green spheres. (b) Structure of {[Co3(ndc)(bipyen)1.5]⋅H2O⋅C6H6}n. Guest benzene and water molecules are yellow and green, respectively. Single structure of (a) and (b) are shown by the lower gray frameworks. © 2004, Wiley-VCH [40], with permission.
