Two new transition metal inorganic-organic hybrid borates: [tris(2-aminoethoxy)trihydroxyhexaborato]cobalt(II) and its nickel(II) analogue.

The two isomorphous title compounds, [1,5,9-tris(2-aminoethoxy)-3,7,11-trihydroxy-3,7,11-tribora-1,5,9-triborata-2,4,6,8,10,12-hexaoxa-13-oxoniatricyclo[7.3.1.0(5,13)]tridecane]cobalt(II), [Co(C(6)H(21)B(6)N(3)O(13))] or Co{B(6)O(7)(OH)(3)[O(CH(2))(2)NH(2)](3)}, and the Ni(II) analogue, [Ni(C(6)H(21)B(6)N(3)O(13))], each consist of an M(II) cation and an inorganic-organic hybrid {B(6)O(7)(OH)(3)[O(CH(2))(2)NH(2)](3)}(2-) anion. The M(II) cation lies on a crystallographic threefold axis (as does one O atom) and is octahedrally coordinated by three N atoms from the organic component. Three O atoms covalently link the B-O cluster and the organic component. Molecules are connected to one another through N-H···O and O-H···O hydrogen bonds, forming a three-dimensional supramolecular network.

6-Nitro-benzimidazolium dihydrogen phosphate 6-nitro-benzimidazole solvate dihydrate.

In the crystal structure of the title compound, C(7)H(6)N(3)O(2) (+)·H(2)PO(4) (-)·C(7)H(5)N(3)O(2)·2H(2)O, the components are connected through O-H⋯O, N-H⋯O and O-H⋯N hydrogen-bonding inter-actions, forming a sheet-like structure parallel to (101). Adjacent sheets are further linked together by strong O-H⋯O hydrogen-bonds involving the dihydrogenphosphate groups. π-π stacking inter-actions between neighbouring aromatic constituents [centroid-centroid distance 3.653 (3) Å] help to consolidate the crystal packing.

A novel inorganic-organic hybrid borate, poly{[Na(2)(C(4)H(2)O(4))(H(3)BO(3))(H(2)O)(4)]·H(3)BO(3)}.

The structure of the title compound, catena-poly[[[di-µ-aqua-µ-fumarato-µ-(boric acid)-disodium]-di-µ-aqua] boric acid monosolvate], contains two crystallographically independent Na(+) cations, each being six-coordinated by one fumarate O atom, one boric acid O atom and four water O atoms in a distorted octa-hedral geometry. Adjacent [NaO(2)(OH(2))(4)] units share edges and are linked into chains propagating parallel to [100]. The free boric acid mol-ecules are connected to the chains through strong inter-molecular O-H⋯O hydrogen bonds. Additional O-H⋯O hydrogen bonds between the water mol-ecules, the free and coordinated boric acid mol-ecules and the fumarate anion lead to the formation of a three-dimensional supra-molecular structure. With the exception of the two water mol-ecules, all other atoms lie on mirror planes.

A novel metallo-organically templated pentaborate: acetato[N,N'-bis(2-aminoethyl)ethane-1,2-diamine]zinc(II) 4,4',6,6'-tetrahydroxy-2,2'-spirobi[cyclotriboroxane](1-).

The title compound, [Zn(C2H3O2)(C6H18N4)][B5O6(OH)4], contains mixed-ligand [Zn(CH3COO)(teta)]+ complex cations (teta is triethylenetetramine) and pentaborate [B5O6(OH)4]- anions. The [B5O6(OH)4]- anions are connected to one another through hydrogen bonds, forming a three-dimensional supramolecular network, in which the [Zn(CH3COO)(teta)]+ cations are located.

Bis[(m-phenyl-enedimethyl-ene)-diammonium] tetra-deca-borate.

The title compound 2C(8)H(14)N(2) (2+)·[B(14)O(20)(OH)(6)](4-), contains diprotonated C(8)H(14)N(2) (2+) cations and centrosymmetric tetra-deca-borate anions. The crystal structure is stabilized by O-H⋯O and N-H⋯O hydrogen bonds.