Further developments for Acta Crystallographica Section C

Editorial for 2002.

Notes for authors

Dicaesium silver zinc thio­cyanate, Cs₂[AgZn(SCN)₅]

The structure of Cs₂[AgZn(SCN)₅] contains units of composition AgZn(SCN)₃ lying on a mirror plane and bonded together through Cs⁺ ions and thio­cyanate groups. The crystal studied contained equal numbers of inversion twins.

Ca₃Mn₂O₇

Single crystals of Ca₃Mn₂O₇ were prepared in an optical floating-zone furnace. The symmetry, which was previously reported as tetragonal according to powder X-ray diffraction studies, is shown to be orthorhombic, A2₁am.

The mixed oxide MoVAlO₇

The complex oxide MoVAlO₇, vanadium aluminium molybdate, crystallizes in the orthorhombic system (space group Pnma). All the metal atoms and three O atoms lie on the mirror plane. Infinite strings of VO₅ square pyramids associated by opposite basal edges develop along [010] and are surrounded by a sequence of eight corner-sharing alternating AlO₆ octahedra and MoO₄ tetrahedra.

Synchrotron-radiation study of the two-leg spin-ladder (VO)₂P₂O₇ at 120 K

The crystal structure of the ambient-pressure phase of vanadyl pyrophosphate, (VO)₂P₂O₇, determined from single-crystal synchrotron data, consists of infinite two-leg ladders of vanadyl cations, (VO)²⁺, which are separated by pyrophosphate anions, (P₂O₇)⁴⁻.

β-Sm(OH)₂Cl: a new lamellar variety

A new variety of dihydroxysamarium chloride is presented. The orthorhombic structure is built up from the stacking of neutral layers stabilized via strong hydrogen bonds between the hydroxyl H atoms and the chlorides.

AgCo₃PO₄(HPO₄)₂

AgCo₃PO₄(HPO₄)₂ consists of edge-sharing CoO₆ chains linked together by the phosphate groups and hydrogen bonds. The three-dimensional framework delimits two types of tunnels which accommodate Ag⁺ cations and OH groups.

Monoclinic AlPO₄ tridymite at 473 and 463 K from X-ray powder data

AlPO₄ tridymite forms an intermediate phase between 373 and 573 K with space-group symmetry P112₁. The crystal structure is dynamically disordered and develops an incommensurate displacive modulation below 473 K.

Calcium dicaesium silver thio­cyanate dihydrate

CaCs₂[Ag₂(SCN)₆]·2H₂O forms a continuous structure where the Ag atoms form chains with S atoms in the c-axis direction. The chains are bonded together through Cs and Ca atoms. The crystal water of the structure is bonded to the Ca atoms, which lie on centers of symmetry.

Hydrogen-bonded adducts of ferrocene-1,1′-diyl­bis­(di­phenyl­methanol): monomeric and polymeric adducts with 1,2-bis­(4-pyridyl)­ethene and 1,6-di­amino­hexane

Hydrogen-bonded adducts of ferrocene-1,1′-diyl­bis­(di­phenyl­methanol): a finite cyclic 1:1 adduct with 2,2′-di­pyridyl­amine

A dinuclear uranium(IV) complex of the chelating ligand 1,2,3,4-tetra­methyl-5-(2-pyridyl)­cyclo­penta­diene

Bis­[2-(pyrazol-3-yl)­phenolato-κ²N²,O]copper(II) di­methanol solvate

μ_1,3-Azido-di­azido­tetra­kis­(1,10-phenanthroline)dicopper(II) azide tetra­hydrate

trans-Bis(di­ethanolamine-N,O)bis­(saccharinato-N)cadmium(II)

Bis(pyridine-2,6-di­methanol-N,O,O′)cobalt(II) and -copper(II) disacchar­inate dihydrate: three-dimensional structures with extensive hydrogen bonds and aromatic π–π-stacking interactions

Sodium p-nitro­benzoxasulfamate monohydrate

Tetra­kis­[phthalocyaninato(2–)­antimony(III)] hexadeca­iodo­tetraantimony(III)

Two orthopalladated chromophores

Hexa-μ-chloro-μ₄-oxo-tetra­kis­[(4,5-di­hydro-2-methyl-1,2-thiazole-κN)copper(II)]

Di­acetatobis­(tri­methyl­ene­thio­urea)­zinc(II) monohydrate

Aqua(nitrilo­tri­acetato)­(1,10-phenanthroline)iron(III) monohydrate: a seven-coordinate iron(III) complex

Poly[[[tri(urea-κO)manganese(II)]-μ-thio­cyanato-κ²N:S-mercury(II)]-tri-μ-tetra­thio­cyanato]

Aqua­bromo(6-carboxypyridine-2-carboxylato-O,N,O′)mercury(II)

A dimeric constrained-geometry titanium complex linked by double Ti–CH₂–Al–CH₂ heterocycles

N-(Ferrocene­carbonyl)-N′-(quinolin-8-yl)thio­urea

Barium(II)–2,4-di­nitrophenolate–18-crown-6 at 183 K

trans-Bis(benzoato-O)tetra­kis­(methanol-O)iron(II): ligand bulk is not structure-determining

A triboluminescent europium(III) complex

A second polymorph of 1,1,4,4-tetra­methyl­piperazinium penta­bromo­thallate(III)

trans-Diaceto­nitrilebis­(di-2-pyridyl sulfide-N,N′)ruthenium(II) bis­(tetra­fluoro­borate) monohydrate

Di-μ-chloro-bis­({2-[N,N-bis­(2-aminoethyl)amino-κ³N]ethylaminium}copper(II)) bis­(naphthalene-1,5-di­sulfonate) pentahydrate

catena-Poly­[[[{N-(6-amino-3,4-di­hydro-3-methyl-5-nitroso-4-oxopyrimidin-2-yl)­glycinato-O}pentaaquastrontium]-μ-N-(6-amino-3,4-di­hydro-3-methyl-5-nitroso-4-oxopyrimidin-2-yl)­glycinato-O:O′] mono­hydrate]: coordination polymer chains linked by hydrogen bonds into a three-dimensional framework

Adducts of 1,1,1-tris­(4-hy­droxy­phenyl)­ethane with 1,2-bis­(4-pyridyl)­ethane and 1,2-bis­(4-pyridyl)­ethene: continuously interwoven structures in three dimensions

A structural hierarchy in the hydrogen-bonded adduct N,N′-di­methyl­piperazine–tartaric acid–water (1/2/2): an N-component N-dimensional structure (N = 3) with substructures having N = 1 and 2

Phthal­imide at 120 K: perforated molecular ribbons containing three different ring motifs

A novel binucleating macrocyclic ligand with two alcohol pendants

Bis­[2-(2-hy­droxy­phen­oxy)­ethyl] ether methanol solvate

An anthracene dimer with a fused 1,3-di­thiole ring at 193 K

Powder diffraction study of the hydrogen bonds in nitroxoline and its hydrochloride

(+)-3-Oxo-4-pregnene-20β-carboxylic acid: catemeric hydrogen bonding in a steroidal keto acid

1,1′-Di­acetyl-3-hy­droxy-2,2′,3,3′-tetra­hydro-3,3′-bi(1H-indole)-2,2′-dione

4-[3-(3,4-Di­meth­oxy­phenyl)­prop-2-enoyl]­phenyl methacryl­ate and 4-[3-(2-bromo­phenyl)­prop-2-enoyl]­phenyl methacryl­ate

2,4-Di­hydroxy-1,3-bis­(meth­oxy­carbonyl­meth­oxy)­calix­[4]­arene and 1,3-bis­(eth­oxy­carbonyl­meth­oxy)-2,4-di­hydroxy­calix­[4]­arene chloro­form solvate

Azinyl Sulfides. LXVII.

2,6-Di­phenyl­pyridine-4-carboxylic acid

2,2′-[2,3-Di­hydro-2-(prop-2-enyl)-1H-iso­indole-1,3-diyl­idene]bis­(propane­dinitrile)–tetra­thia­fulvalene (1/1), TCPI–TTF

Supramolecular structures of 5-[3-(4-methyl­phenyl)- and 5-[3-(4-chloro­phenyl)-2-propenyl­idene]-2,2-di­methyl-1,3-dioxane-4,6-dione

A comparison of the supramolecular structures of 1-(6-amino-1,3-benzodioxol-5-yl)-3-(3,4,5-tri­meth­oxyphenyl)prop-2-en-1-one and 1-(6-amino-1,3-benzodioxol-5-yl)-3-[4-(N,N-di­methylamino)phenyl]prop-2-en-1-one

Hexa­methyl­ene­tetraminium 2,4,6-tri­nitro­phenolate

A 1:1 adduct of hexa­methylene­tetramine and 4-hy­droxy-3-meth­oxy­benz­aldehyde

Conformational polymorphism in a chiral spiro-cis-ansa-bridged cyclo­triphosphazene derivative

Macrocalyxin I