A new organically templated vanadium tellurite: (H2dien)[(VO2)(TeO3)]2.2H2O (dien is diethylenetriamine).

A new organically templated vanadium tellurite, poly[2,2′-im­ino­diethanaminium [hexa-μ2-oxido-tetra­oxidoditellurium(IV)di­vanadium(V)] dihydrate], {(C4H15N3)[Te2V2O10]·2H2O}n, features the inter­connection of distorted [VO5] trigonal bipyramids by bridging [TeO3] pyramids, leading to a two-dimensional corrugated anionic layer with an inter­layer distance of about 13.47 A. The inter­layer space is occupied by doubly proton­ated diethyl­ene­triamine cations (H2dien) and guest water mol­ecules. The two terminal amino groups of H2dien are proton­ated, while the middle amino group, located on a twofold rotation axis, is not protonated. All the three amino groups and water mol­ecules are involved in hydrogen-bonding inter­actions. The compound represents a new member in the series (H2am)[(VO2)(TeO3)]2·xH2O, where H2am represents a doubly protonated diamine. Similarities and differences between the structures of members of the series are discussed.