The title compound, C(9)H(7)N(5), is non-planar with a dihedral angle between the substituted benzene and tetra-zole rings of 71.13 (9)°. Molecules are connected in centrosymmetric dimers by weak C-H⋯N inter-actions [C⋯N is 3.548 (5) Å]; these are the only interactions of significance in the crystal structure.

The Sn(IV) atom in the centrosymmetric dinuclear title compound, [Sn(2)(C(4)H(9))(4)(C(7)H(3)NO(4))(2)(H(2)O)(2)], exists in a trans-C(2)SnNO(4) penta-gonal-bipyramidal geometry. There are two half-mol-ecules in the asymmetric unit that are completed by inversion symmetry. The crystal studied was a non-merohedral twin with a ratio of 47.3 (1)% for the minor twin component. Bond dimensions are s...

In the cation of the title compound, C(6)H(6)N(5) (+)·NO(3) (-), the dihedral angle between the pyridinium and tetra-zole rings is 8.2 (2)°. The constituent ions of the compound are linked via N-H⋯O hydrogen bonds, forming helical chains running along the b axis. C-H⋯N and C-H⋯O hydrogen bonds are also observed.

In the title compound, K(9)Al(3)(PO(4))(6), the anionic substructure is built of inter-linked [PO(4)] and [AlO(4)] tetra-hedra. Each O atom of the [AlO(4)] tetra-hedron is common to a positionally different [PO(4)] tetra-hedron; thus, each [AlO(4)] tetra-hedron is surrounded by four positionally different [PO(4)] tetra-hedra. On the other hand, each [PO(4)] tetra-hedron shares its two O atoms w...

The five-membered ring in the title compound, C(6)H(13)O(3)P, exists in an envelope conformation with one of the ring C atoms at the flap position. The coordination geometry around the P atom is a distorted tetra-hedron. The crystal structure is stabilized by several weak C-H⋯O and P-H⋯O hydrogen bonds, forming a three-dimensional network.

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In the title dye compound, C(19)H(14)BF(7)N(2), the boron-dipyrromethene core lies on a crystallographic mirror plane which bis-ects the BF(2) and penta-fluoro-phenyl groups. The dihedral angle between the penta-fluoro-phenyl ring and the tricyclic system is thus 90° by symmetry. The sp(3)-hybridized B atom has a slightly distorted tetra-hedral coordination.

The two Al atoms in the title compound, [Al(2)(CH(3))(5)(C(23)H(20)NO)], are four-coordinated in a distorted tetra-hedral environment. The coordination of one Al atom includes three methyl-C atoms and the O atom from the ligand, whereas the second Al atom is surrounded by the O atom and one N atom from the ligand as well as by two methyl-C atoms. In the ligand, the dihedral angle between the tw...

In the title compound, C(8)H(7)N(5)O(2), the benzene ring makes a dihedral angle of 45.7 (2)° with the tetra-zole ring. In the crystal structure, the mol-ecules are linked into a chain running along the a axis by N-H⋯N hydrogen bonds, and the chains are linked through π-π inter-actions between the tetra-zole rings [centroid-centroid distance = 3.450 (2) Å].

The title compound, C(16)H(14)N(8), is a new chiral ligand designed for applications in supra-molecular chemistry and Fe(2+) spin-crossover complexes. The crystal structure shows a herring-bone arrangement of the mol-ecules, which are mutually linked via inter-molecular C-H⋯N inter-actions mainly donated by the alkyl and tetra-zole H atoms.