A new high-pressure strontium germanate, SrGe₂O₅

A new strontium germanate, SrGe₂O₅, was crystallized at 6 GPa and 1223 K. The effect of cation size on the crystal structure is discussed in terms of bonding nature.

The hydrogen-bonded complex bis­(tert-butyl­ammonium) 2,6-di­chloro­phenolate 2,4-di­chloro­phenol–2,4-di­chloro­phenolate tetra­hydro­furan disolvate containing a chiral R₅³(10) hydrogen-bonded ring as a supramolecular synthon

In the solvated salt derived from 2,4-di­chloro­phenol, tert-butyl­amine, 2,6-di­chloro­phenol and tetrahydrofuran, five components, namely two tert-butylammonium cations, one 2,4-dichlorophenol molecule, one 2,4-dichlorophenolate anion and one 2,6-dichloro­phenolate anion, are bound by N—H⋯O and O—H⋯O hydrogen bonds to form a hydrogen-bonded ring with the graph-set motif (10), which is further associated with two pendant tetra­hydro­furan solvent mol­ecules by N—H⋯O hydrogen bonds. The hydrogen-bonded ring has inter­nal symmetry, with a twofold axis running through the centre of the 2,6-di­chloro­phenolate anion, and is isostructural with a previous structure.

Two new two-dimensional coordination polymers based on isophthalate and a flexible N-donor ligand containing benzimidazole and pyridine rings: synthesis, crystal structures and a solid-state UV–Vis study

Two new transition metal complexes, namely [Co(L)_0.5(IPA)(H₂O)]_n and [Cd(L)_0.5(IPA)(H₂O)]_n (L is 1,4-bis­{[1-(pyridin-3-ylmeth­yl)-1H-benz[d]imidazol-2-yl]meth­oxy}benzene and IPA is isophthalate), have been constructed by a symmetric N-donor ligand and a carboxyl­ate ligand under hydro­thermal conditions. An X-ray crystallographic study reveals that the complexes are isostructural, with both exhibiting a three-dimensional supra­molecular architecture built by hydrogen bonds.

The tropolone–iso­butyl­amine complex: a hydrogen-bonded troponoid without dominant π–π inter­actions

The organic salt formed by transfer of a proton between tropolone and iso­butyl­amine has been studied by crystallographic, computational, and statistical methods, revealing an extensive hydrogen-bonding network but a surprising absence of the π-mediated inter­actions that characterize many other troponoid-based crystals.

Crystal structure and hydrogen bonding in the hydrated cocrystalline salt tryptaminium–3,5-di­nitro­benzoate–quinoline–water (3/3/2/2)

The crystal structure of the bis­(quinoline) adduct dihydrate of tris­(tryptaminium 3,5-di­nitro­benzoate) shows an extensively hydrogen-bonded and π–π-bonded one-dimensional columnar extension.

The antitumour drug 7-ethyl-10-hy­droxycampto­thecin monohydrate and its solid-state hydrolysis mechanism on heating

The crystal structure of 7-ethyl-10-hy­droxy­camptothecin monohydrate suggests that the hydrogen-bond network around the water mol­ecule and the lactone ring promotes the hydrolysis reaction in the crystal.

Cocrystals of 1,4-diethynyl­benzene with 1,3-di­acetyl­benzene and benzene-1,4-dicarbaldehyde exhibiting strong nonconventional alkyne–carbonyl C—H⋯O hydrogen bonds between the components

The 1:1 cocrystal of 1,4-diethynyl­benzene with 1,3-di­acetyl­benzene and the 1:1 cocrystal of 1,4-diethynyl­benzene with benzene-1,4-dicarbaldehyde feature a strong nonconventional ethyn­yl–carbonyl sp-C—H⋯O hydrogen bond between the components.

Acetic anhydride at 100 K: the first crystal structure determination

Acetic anhydride is a widely used acetyl­ation reagent in organic synthesis. The crystal and mol­ecular structure, as determined by single-crystal X-ray analysis at 100 K, is reported for the first time. The mol­ecule adopts an exact C₂-symmetric conformation about a crystallographic twofold axis.

Crystallization experiments with the dinuclear chelate ring complex di-μ-chlorido-bis­[(η²-2-allyl-4-meth­oxy-5-{[(propan-2-yl­oxy)carbon­yl]meth­oxy}phenyl-κC¹)platinum(II)]

Crystallization experiments with the dinuclear chelate ring complex di-μ-chlorido-bis­[(η²-2-allyl-4-meth­oxy-5-{[(propan-2-yl­oxy)carbon­yl]meth­oxy}phenyl-κC¹)platinum(II)] using five different conditions has resulted in four different complexes.

Hawley's Condensed Chemical Dictionary. Sixteenth Edition