One-dimensional zinc(II) fumarate coordination polymers

Abstract

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.