A new procedure developed for the synthesis and crystallization of various zinc(II) fumarate hydrate coordination polymers is described. In the first step, anhydrous Zn(II) fumarate, [Zn(C4H2O4)] (1), is synthesized from Zn(II) acetate and fumaric acid in methanol. Subsequently, this product is used as a starting material for growing small crystals of bis-aqua Zn(II) fumarate, [Zn(H2O)(2)(C4H2O4)] (2), triaqua Zn(II) fumarate monohydrate, [Zn(H2O)(3)(C4H2O4)]H2O (3), tetraaqua Zn(II) fumarate, [Zn(H2O)(4)(C4H2O4)] (4), and tetraaqua Zn(II) fumarate monohydrate, [Zn(H2O)(4)(C4H2O4)]H2O (5). All structures were determined or redetermined by X-ray structure analyses. The hitherto unknown compound 3 exhibits a zig-zag chain structure with five-coordinate Zn(II) ions.
Reactivity Studies of Metal–Organic Frameworks under Vapor‐Assisted Aging: Structural Interconversions and Transformations
We systematically studied the chemical reactivities of 13 metal–organicframeworks (MOFs) under vapor-assisted aging (VAG) at room temperature. The MOFs aged in solvent vapor at room temperature showed unexpectedly high reactivities for transformations into structures with other coordination networks. In addition, three MOFs reacted with 4,4′-bipyridine to form three-dimensional microporous MOFs under