The (CNH)[Cu(HO)]() Structural Family: When Fluoroberyllate, Sulfate, and Selenate Are Full Analogs.

Two new organo-inorganic hybrids, (CNH)[Cu(HO)](BeF) () and (CNH)[Cu(HO)](SeO) (), were prepared via the interaction of ethylenediamine, copper fluoroberyllate or selenate, and H[BeF]/HSeO in aqueous solutions. The structures of and are similar to each other and the previously reported (CNH)[Cu(HO)](SO): monoclinic, 2/, = 5.1044(2) Å, = 11.6171(4) Å, = 10.1178(3) Å, and β = 94.431(3)° for ; and = 5.25020(10), = 11.7500(2), = 10.4434(2), and β = 94.5464(17)° for . All structures contain a square planar [Cu(HO)] species, which coordinates, at rather long distances, two tetrahedral dianions in κ mode, forming relatively weak [Cu(HO)()] complexes. These are linked together via hydrogen bonding into pseudo-chains; the ethylenediammonium cations link them into a 3D architecture. Compound is, to the best of our knowledge, the first-though expected-representative of a hybrid organo-inorganic fluoroberyllate. The crystal chemical relations within the structural family (enH)[Cu(HO)]() are discussed.