Acta Crystallographica Section C in 2014

Editorial

The series RE₅Li₂Sn₇ (RE = Ce, Pr, Nd, Sm) revisited: crystal structure of RE₅Li_2−xSn_7+x [0 ≤ x ≤ 0.03 (1)]

Polar inter­metallic phases with complex structures are reported in the RE–Li–Sn system (RE = Ce, Pr, Nd, Sm). They crystallize in the chiral ortho­rhom­bic space group P2₁2₁2₁ (No. 19), which is relatively uncommon among inter­metallic phases.

The isotypic hydrogen phosphate and arsenate dihydrates M₂HXO₄·2H₂O (M = Rb, Cs; X = P, As)

The four isotypic arsenate(V) and phosphate(V) dihydrates M₂HXO₄·2H₂O (M = Rb, Cs; X = P, As) crystallize in the space group P2₁/c. A hypothetical proton-disordered C2/c structure is discussed.

A new heteroleptic oxalate-based compound: poly[[2-(amino­meth­yl)pyridine]di-μ₆-oxalato-chromium(III)potassium(I)]

This study reports the structure of a new heteroleptic oxalate-based compound obtained with the 2-picolyl­amine ligand. It is built-up by bimetallic oxalate-bridged Cr^III–K helical chains which are linked through centrosymmetric K₂O₂ units.

A one-dimensional coordination polymer formed from the reaction of 1,1-di­phenyl-3,3′-[(1R,2R)-cyclo­hexane-1,2-diylbis(aza­nedi­yl)]dibut-2-en-1-one with MnCl₂·4H₂O

A one-dimensional chiral helical coordination polymer was synthesized from the rigid chiral bidentate Schiff base ligand 1,1-diphenyl-3,3′-[(1R,2R)-cyclo­hexane-1,2-diylbis(aza­nedi­yl)]dibut-2-en-1-one with Mn^II. The structure displays intra­molecular ionic N⁺—H⋯O⁻ hydrogen bonding and π–π inter­actions between pairs of phenyl rings which strengthen the chains.

Poly[[chlorido­(1,10-phenanthroline-κ²N,N′)copper(II)]-μ₃-1,1,3,3-tetra­cyano-2-eth­oxy­propenido-κ³N:N′:N′′]: coordination polymer sheets linked into bilayers by hydrogen bonds

In the title complex, the (4 + 2) coordination polyhedron around the Cu^II centre includes N atoms from three different 1,1,3,3-tetra­cyano-2-eth­oxy­propenide ligands, so forming a two-dimensional coordination polymer.

A trinuclear palladium(II) complex containing N,S-coordinating 2-(benzyl­sulfanyl)anilinide and 1,3-benzo­thia­zole-2-thiol­ate ligands with a central square-planar PdN₄ motif

A linear trinuclear Pd₃ complex containing N,S-coordinating 2-(benzyl­sulfanyl)anilinide and 1,3-benzo­thia­zole-2-thiol­ate ligands has symmetry and a Pd⋯Pd separation of 3.2012 (4) Å. All three Pd^II atoms have a square-planar geometry, while the central Pd^II core shows an all N-coordination. 1,3-Benzothiazole-2-thiolate was formed in situ from 2-(benzyl­sulfanyl)aniline.

A fivefold inter­penetrating diamond­oid three-dimensional metal–organic framework constructed from benzene-1,4-di­acetic acid and flexible triazole derivatives: poly[[(μ₂-benzene-1,4-di­acetato-κ²O:O){μ₂-1,4-bis­[(1H-1,2,4-triazol-1-yl)methyl]benzene-κ²N⁴:N^4′}zinc(II)] monohydrate]

The title compound has a fivefold inter­penetrating diamondoid three-dimensional metal–organic framework, with each Zn^II centre surrounded by two O-donor atoms from monodentate carboxyl­ate groups belonging to two different benzene-1,4-di­acetate ligands and by two triazole N-donor atoms from two different 1,4-bis­[(1H-1,2,4-triazol-1-yl)methyl]benzene ligands.

`0'- and `8'-shaped complexes generated from a nano-sized oxa­diazole-containing organic ligand with CdI₂ and CuI

The new nano-sized rigid double-armed oxa­diazole-bridged ligand 2,5-bis­{2-methyl-5-[2-(pyridin-3-yl)ethen­yl]phen­yl}-1,3,4-oxa­diazole has been used to create two novel metallocyclic complexes with one adopting a 20-membered `0'-shaped metallocyclic structure and the second adopting a discrete `8'-shaped metallocyclic structure.

Three one-dimensional coordination polymers based on 1,1′-bis­(pyridin-4-ylmeth­yl)-2,2′-bi-1H-benzimidazole and HgX₂ (X = Cl, Br and I)

The new ligand 1,1′-bis­(pyridin-4-ylmeth­yl)-2,2′-bi-1H-benzimidazole has been combined with HgX₂ (X = Cl, Br and I) to create three one-dimensional coordination polymers. The three complexes have one-dimensional zigzag chains and the Hg^II centres are in a distorted tetra­hedral [HgX₂N₂] geometry in each case.

A supra­molecular ladder-like network from trimesic acid and pyrazine N,N′-dioxide

Cocrystallized trimesic acid (TMA) and pyrazine N,N′-dioxide (PNO) mol­ecules form strong O—H⋯O hydrogen bonds, but also important weak C—H⋯O and dipole–dipole inter­molecular inter­actions, to generate a densely packed three-dimensional network.

Conformation of a terminally protected βγ hybrid dipeptide Boc-Ant-Gpn-OMe stabilized by C₆/C₇ hydrogen bonds

A hybrid βγ dipeptide, Boc-Ant-Gpn-OMe, adopts a folded conformation stabilized by intra­molecular six- (C₆) and seven-membered (C₇) hydrogen bonds, together with weak C—H⋯O and C—H⋯π inter­actions, resulting in a ribbon-like structure.

(5RS)-5-(4-Meth­oxy­phen­yl)-2-(methyl­sulfan­yl)benzo[g]pyrimido[4,5-b]quinoline-4,6,11(3H,5H,12H)-trione, with Z′ = 3, forms a three-dimensional hydrogen-bonded framework con­taining five types of hydrogen bond

Five types of hydrogen bond link three independent mol­ecules into a three-dimensional framework structure.

π-stacking and C—X⋯D (X = H, NO₂; D = O, π) inter­actions in the crystal network of both C—H⋯N and π-stacked dimers of 1,2-bis­(4-bromo­phenyl)-1H-benzimidazole and 2-(4-bromo­phenyl)-1-(4-nitro­phenyl)-1H-benzimidazole

Mol­ecules of two substituted 1H-benzimidazoles are arranged in dimeric units through C—H⋯N and parallel-displaced π-stacking inter­actions. The mol­ecular packing of the dimers arises by the concurrence of a diverse set of weak inter­molecular C—X⋯D (X = H, NO₂; D = O, π) inter­actions.

Three tri­thia­diazepines and a tri­thia­triazepine

The most precise determinations to date for the 1,3,5,2,4-tri­thia­diazepine and 1,3,5,2,4,6-tri­thia­triazepine ring systems are presented, including deformation density maps consistent with the expected bonding electron density.

Tetra- and hexa­hydrates of bis­(aden­inium) zoledronate

In two hydrated structures of bis­(adeninium) zoledronate, the zoledronate anion displays its usual zwitterionic character, with a protonated imidazole ring; however, the ionization state of the phospho­nate groups of the anions are different.

The coordination chemistry of two symmetric fluorene-based organic ligands with cuprous chloride. Corrigendum

Corrigendum to Acta Cryst. (2013), C69, 1488–1493.