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Abstract
In the title structure, C6H6N2O·H6O6Te, the pyridine-3-carboxamide and telluric acid mol-ecules are inter-connected by conventional O-H⋯N, N-H⋯O and O-H⋯O hydrogen bonds of moderate strength as well as by π-π inter-actions between the pyridine rings. The strongest hydrogen bond in the structure is formed between a hydroxyl group of the H6TeO6 mol-ecule and the N-pyrimidine N atom. The structure is unusual because of presence of the alternating sheets, which contain H6TeO6 and pyridine-3-carboxamide mol-ecules, respectively. These sheets are aligned parallel to (001).
Highlights
C6H6N2OÁH6O6Te, the pyridine-3-carboxamide and telluric acid molecules are interconnected by conventional O—HÁ Á ÁN, N—HÁ Á ÁO and O—HÁ Á ÁO hydrogen bonds of moderate strength as well as by – interactions between the pyridine rings
The strongest hydrogen bond in the structure is formed between a hydroxyl group of the H6TeO6 molecule and the N-pyrimidine N atom
The motivation for the title structure determination follows from the fact that there are relatively a few structure determinations of molecular crystals containing the telluric acid molecule H6TeO6 (Groom et al, 2016)
Summary
The motivation for the title structure determination follows from the fact that there are relatively a few structure determinations of molecular crystals containing the telluric acid molecule H6TeO6 (Groom et al, 2016). In most of the listed structures, the molecules of H6TeO6 form columns which are interconnected by O—HÁ Á ÁO hydrogen bonds Such a situation takes place in KUTBUW (the columns are parallel to the a axis), UREATE, UREATE01, UREATE02 (parallel to the c axis) and VALTUX (parallel to the c axis). The most important piece of knowledge derived from the study of the title structure is the functionality of the telluric acid molecule, which can become a constitutional part of the hydrogen-bonding pattern. This property of the telluric acid molecule has not been so far studied in depth in molecular crystals because of scarcity of relevant structural data. Symmetry codes: (i) Àx þ 2; Ày þ 1; Àz þ 1; (ii) x; y; z þ 1; (iii) Àx; Ày þ 1; Àz; (iv) Àx þ 1; Ày; Àz; (v) Àx þ 1; Ày þ 1; Àz; (vi) Àx; Ày; Àz
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