title: Bis(tetra-ethyl-ammonium) bis-(hydrogen l-tartrate) l-tartaric acid monohydrate.
abstract: In the title compound, 2C(8)H(20)N(+)·2C(4)H(5)O(6) (-)·C(4)H(6)O(6)·H(2)O, the presence of the two tetra-ethyl-ammonium cations is balanced by two hydrogen l-tartrate anions. Also present in the asymmetric unit are a mol-ecule of l-tartaric acid and a water mol-ecule. The various components are linked by O-H⋯O hydrogen bonds. In the crystal, two-dimensional networks are formed via O-H⋯O hydrogen bonds and C-H⋯O inter-actions involving the water mol-ecule, the hydrogen l-tartrate anions and the l-tartaric acid mol-ecules. These layers, which stack along [001], are separated by tetra-ethyl-ammonium cations. The latter are also involved in C-H⋯O inter-actions with the anions and the l-tartaric acid and water mol-ecules participating in the two-dimensional network.
authors.forename: M
authors.initials: M
authors.lastname: Rajalakshmi
authors.forename: R
authors.initials: R
authors.lastname: Indirajith
authors.forename: R
authors.initials: R
authors.lastname: Gopalakrishnan
authors.forename: K
authors.initials: K
authors.lastname: Ramamurthi
authors.forename: Helen
authors.initials: H
authors.lastname: Stoeckli-Evans