Alkali scandium arsenates. I. The framework structures of KSc(HAsO₄)₂ and RbScAs₂O₇

KSc(HAsO₄)₂ and RbScAs₂O₇ are both characterized by three-dimensional octahedral–tetrahedral frameworks, with intersecting tunnels hosting the alkali atoms. KSc(HAsO₄)₂ represents a new structure type, while RbScAs₂O₇ is the first reported diarsenate isotypic with KAlP₂O₇.

Alkali scandium arsenates. II. The framework structures of α- and β-CsSc(HAsO₄)₂

The triclinic (α) and monoclinic (β) modifications of CsSc(HAsO₄)₂ have three-dimensional octahedral–tetrahedral framework structures, with tunnels hosting the Cs atoms, and represent the first arsenate examples of their structure types. Strong to weak hydrogen bonds reinforce both frameworks.

A new chromate of tetravalent cerium: Ce₂(CrO₄)₄·2H₂O

The crystal structure of the new chromate Ce(CrO₄)₄·2H₂O, prepared from an acidic aqueous solution at room temperature, is built from isolated CrO₄ tetrahedra connected to isolated Ce(O,H₂O)_n (n = 8 and 9) polyhedra.

Powder neutron diffraction of SrNbO₂N at room temperature and 1.5 K

The peroskite oxynitride SrNbO₂N crystallizes in space group , both at room temperature and at 1.5 K. The Nb(O,N)₆ octahedra are slightly rotated with respect to the tetragonal axis. A partially order of oxygen and nitrogen on the anionic sites was found.

Mg₇(AsO₄)₂(HAsO₄)₄: a new magnesium arsenate with a very strong hydrogen bond

Hydro­thermally synthesized Mg₇(AsO₄)₂(HAsO₄)₄ has a framework structure built of edge- and corner-sharing MgO₆, MgO₄(OH)₂, MgO₅, AsO₃(OH) and AsO₄ polyhedra. The compound contains a very short hydrogen bond [O⋯O = 2.468 (3) Å].

Bis­[1,3-bis­(2-methyl­tetrazol-5-yl-κN⁴)­triazenido-κN²]­nickel(II)

Bis(μ-2-sulfonatobenzoato)bis­[(1,10-phenanthroline)­lead(II)] dihydrate

Two phases of bis­(tetra­ethyl­ammonium) di-μ-chloro-bis­[di­chloro­palladium(II)]

An unexpected chelate conformation in trans-[(R)-N,N′-bis­(α-phenyl­salicyl­idene)­propane-1,2-diaminato(2–)]­bis­(1-methyl-1H-imidazole-κN³)­cobalt(III) perchlorate

Bis(4,4′-bi­pyridine-κN)­bis­(hydrogen phthalato)-κ²O,O′;κO-zinc(II)

Bis(μ-cyst­amine-κ⁴N,S:S′,N′)­bis­[(2-amino­ethane­thiol­ato-κ²N,S)­iridium(III)] tetrabromide dihydrate

catena-Poly­[[[μ-pyridinium-3-carboxylato-bis­[di­oxomolybdenum(VI)]]-di-μ₃-oxo] monohydrate]

μ-Bi­phenyl-2,2′-di­thiol­ato-κ²S:S′-bis­[(tri­phenyl­phosphine-κP)­gold(I)]

A one-dimensional ladder-like coordination polymer derived from chains formed via hydrogen bonds: catena-poly­[[aqua­dipyridine­nickel(II)]-μ-2,2′-di­thio­dibenzoato-κ³O,O′:O′′]

Bis{μ-2-[3-(cyclo­hexyl­ammonio)­propyl­imino­methyl]­phenolato}bis­[di­chloro­copper(II)]

catena-Poly­[1,4-diazo­niabi­cyclo­[2.2.2]­octane [silver(I)-tri-μ-thio­cyanato-κ⁶S:S]]

[Pd(CH₃COO)₂]_n from X-ray powder diffraction data

Tetra­aqua(3,4,7,8-tetra­methyl-1,10-phenanthroline-κ²N,N′)­zinc(II) thio­sulfate

Aqua­bis­(2-nitro­benzoato-κO)(1,10-phenanthroline-κ²N,N′)­zinc(II)

Bis(μ-ethyl pyridine-2,6-di­carboxyl­ato)­bis­[di­aqua­chloro­cadmium(II)] dihydrate

Poly­[[bis­[aqua(1,10-phenanthroline)­lanthanum(III)]-μ-aqua-di-μ-5-sulfonatoisophthalato] monohydrate] and poly­[[[tri­aqua­lanthanum(III)]-μ-5-sulfonatoisophthalato] monohydrate]

Amido­bis­[η⁵-1,3-bis­(tri­methyl­silyl)­cyclo­penta­dienyl]­titanium(III)

Three 5H-indeno­[1,2-c]­pyridazin-5-one derivatives, potent type-B mono­amine oxidase inhibitors

N-(3H-Thia­zol-2-yl­idene)­nitr­amine and N-methyl-N-(thia­zol-2-yl)­nitr­amine

6β-Azido-7α-hy­droxy-17-oxo-5α-androstan-3β-yl acetate

The 1:1 adduct of hexa­methyl­ene­tetramine (HMT) with racemic trans-1,2-cyclo­hexane­dicarboxylic acid (CDA)

Two biologically active thio­phene-3-carbox­amide derivatives

4′,4′,6′,6′-Tetra­chloro-3,4-di­hydro-3-(6-methyl­pyridin-2-yl)­spiro­[1,3,2-benzox­aza­phosphinine-2,2′-(2λ⁵,4λ⁵,6λ⁵-cyclo­triphosphazene)]

Di­ethyl 3,8-di­methyl-4,7-di­aza­deca-2,8-dienedioate

Crystal engineering via C—H⋯F and C—H⋯π interactions in two substituted indoles

1-[4-(Methyl­sulfonyl)­phenyl]-5-phenyl-1H-pyrazole derivatives

Secondary interactions in the iso­morphous compounds 2,6-bis­(chloro­methyl)­pyridinium chloride and 2,6-bis­(bromo­methyl)­pyridinium bromide

Preference for the Diels–Alder addition of dienes syn to the O atom in cross-conjugated spiro­cyclic cyclo­hexadienones

(Z)-2-(1-Phenyl­sulfonyl-1H-indol-3-yl­methyl­ene)-1-aza­bicyclo­[2.2.2]­octan-3-one and (Z)-(S)-2-(1-phenyl­sulfonyl-1H-indol-3-yl­methyl­ene)-1-aza­bicyclo­[2.2.2]­octan-3-ol

6-(4-Meth­oxy­benzyl­amino)­purin-3-ium chloride

3,6-Bis(2-pyridyl)di-1,2,4-triazolo­[3,4-a:4′,3′-c]­phthalazine

Desorption kinetics of a xanthenol–dioxane clathrate

Structure–activity relationships in 4- and 5-androstene: 3β-acet­oxy-17-methyl-17-oxo-16,17-seco-5-androstene-16-carbo­nitrile and 17-methyl-3,17-dioxo-16,17-seco-4-androstene-16-carbo­nitrile

1-Methyl-1-phenyl-3-[1-hy­droxy­imino-2-(succinimido)­ethyl]­cyclo­butane

2-Amino-2-thia­zoline and its 1:1 organic salt with 2-naphth­oxy­acetic acid

Di­methyl 2-(4-bromo­phenyl)-10,11-di­meth­oxy-2,3,7,8-tetra­hydro­spiro­[azepino[2,1-a]­iso­quinoline-3,9′-fluorene]-4,5-di­carboxyl­ate

Orthorhombic and monoclinic polymorphs of 1,3,5-tri­phenyl­per­hydro-1,3,5-triazine-2,4,6-trione at 120 K: chains and sheets formed by C—H⋯π(arene) hydrogen bonds

Hydrogen-bonded dimers in 2-nitro­benz­aldehyde hydrazone and a three-dimensional hydrogen-bonded framework in 3-nitro­benz­aldehyde hydrazone

1-Methyl­piperazine-1,4-diium 4-nitro­phthalate(2–) 4-nitro­phthalic acid monohydrate

C—H⋯π, π–π and C—H⋯Cl interactions in chloro-substituted Schiff bases and 4-chloro-N-[4-(di­methyl­amino)­benzyl­idene]­aniline

1-(4-Bromo­phenyl)-3-(4-methyl­phenyl)­prop-2-en-1-one

Di­ethyl piperazine-1,4-diyldioxalate

N¹-(4-tert-Butyl­phenyl)-N²-hy­droxy-α-oxo-α-phenyl­acet­amidine and N²-hy­droxy-N¹-(4-nitro­phenyl)-α-oxo-α-phenyl­acet­amidine hemihydrate

Two enamines derived from 1-n-alkyl-3-methylpyrazol-5-ones