title: catena-Poly[[tetrakis(micro-2,2-dimethylpropionato-O:O')dicopper(II)]-micro-dioxane-O:O'] and catena-poly[[tetrakis(micro-3,3-dimethylbutyrato-O:O')dicopper(II)]-micro-dioxane-O,O'].
abstract: The title two compounds, [Cu(2)(C(5)H(9)O(2))(4)(C(4)H(8)O(2))](n), (I), and [Cu(2)(C(6)H(11)O(2))(4)(C(4)H(8)O(2))](n), (II), are isomorphous. The binuclear Cu(II) units have a cage structure and are linked by the dioxane molecules to form a zigzag chain along the c axis. The binuclear copper unit and the dioxane ligand each have a centre of symmetry.
authors.affiliation: Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223-8522, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kani
authors.forename: M
authors.initials: M
authors.lastname: Tsuchimoto
authors.forename: S
authors.initials: S
authors.lastname: Ohba
authors.forename: T
authors.initials: T
authors.lastname: Tokii