forthcoming articles

The following articles are a selection of those recently accepted for publication in Acta Crystallographica Section C: Structural Chemistry.

See also Forthcoming articles in all IUCr journals.

Accepted 11 September 2015

Photoluminescence properties of a cationic tri­nuclear zinc(II) complex with the tetradentate Schiff base ligand 6-methyl-2-({[(pyridin-2-yl)meth­yl]imino}­meth­yl)phenolate

Accepted 6 September 2015

The first three-dimensional FeIII–SrII heterometallic coordination polymer: poly[[di­aqua­tetra­kis­(μ3-pyridine-2,3-di­carboxyl­ato)diiron(III)strontium(II)] dihydrate]

The first three-dimensional FeIII–SrII heterometallic coordination polymer was prepared by the reaction of pyridine-2,3-di­carb­oxy­lic acid (H2pydc), SrCl2·6H2O and Fe(OAc)2(OH) (OAc is acetate). One-dimensional [Fe2(pydc)4]n chains are connected by SrII cations to form a three-dimensional framework. The topology type of this framework is tfj.

Accepted 3 September 2015

Halogen-bonded adduct of 1,2-di­bromo-1,1,2,2-tetra­fluoro­ethane and 1,4-di­aza­bicyclo­[2.2.2]octa­ne

The adduct formed between 1,4-di­aza­bicyclo­[2.2.2]octa­ne and BrCF2CF2Br exhibits a one-dimensional polymeric structure in which the C—N⋯Br halogen-bond length is shorter than the average for related type I C—N⋯Br—C halogen-bonded systems, and shorter than found in two other reported crystal structures of related BrCF2CF2Br adducts.

Accepted 3 September 2015

A structural study of Si6-ring-containing [Si6Cl14]2− chloro­silicates

In the crystal structures of four substituted-ammonium dichloride dodeca­chloro­hexa­silanes, the dodeca­chloro­hexa­silane ring is located on a crystallographic centre of inversion. The geometry of the dichloride dodeca­chloro­hexa­silanes in the different structures is almost the same, irrespective of the cocrystallized cation and solvent.

Accepted 2 September 2015

Synthesis and structure determination of seven ternary bis­muthides: crystal chemistry of the RELi3Bi2 family (RE = La–Nd, Sm, Gd, and Tb)

RELi3Bi2 (RE = La–Nd, Sm, Gd, Tb) phases are challenging to synthesize and characterize, and many of the seven reported structures are the first known compounds in the respective RE–Li–Bi ternary phase diagrams.

Accepted 1 September 2015

Two new cadmium(II) coordination polymers based on bis­(1,2,4-triazol-1-yl)alkane ligands and pyrazine-2,3-di­carb­oxy­lic acid

Comparing the structures of the two complexes formed from pyrazine-2,3-di­carb­oxy­lic acid and CdII in the presence of bis­(1,2,4-triazol-1-yl)butane or bis­(1,2,4-triazol-1-yl)ethane, it seems that the length of the flexible bis­(1,2,4-triazol-1-yl)alkane ligand and the coordination modes of the pyrazine-2,3-di­carboxyl­ate anionic ligand might play key roles in determining the structures.

Accepted 31 August 2015

A new CoII complex of diniconazole: synthesis, crystal structure and anti­fungal activity

A new CoII complex incorporating diniconazole as a ligand adopts an octa­hedral geometry, coordinated by two water O atoms and by four diniconazole N atoms. The anti­fungal activity of this complex is enhanced for Botryosphaeria ribis and Botryosphaeria berengriana, but reduced for Gibberella nicotiancola and Alternariasolani compared to that of diniconazole.

Accepted 28 August 2015

Polymorphism in 3-acetyl-4-hy­droxy-2H-chromen-2-one

Two polymorphs of 3 acetyl-4-hydroxy­coumarin differ mainly in the packing of the mol­ecules, with π–π stacking inter­actions between keto–enol hydrogen-bonded rings stabilizing the first form and the second form being stabilized by inter­actions between α-pyrone rings.

Accepted 26 August 2015

Structure and packing of aminoxyl and piperidinyl acryl­amide monomers

The mol­ecular and crystal structures of 2,2,6,6-tetra­methyl-4-acryl­amido-1-piperidine-1-oxyl and N-(2,2,6,6-tetra­methyl­piperidin-4-yl)acryl­amide, synthesised as precursors to redox-active polymer gel systems, are reported.

Accepted 25 August 2015

The hydro­chloride and hydro­bromide salt forms of (S)-amphetamine

Relatively few structural studies of the salt forms of amphetamine have been reported. The structures of (S)-amphetamine hydro­chloride and hydro­bromide are broadly similar in terms of cation conformation, the existence of three N—H⋯X hydrogen-bond contacts per anion and the overall two-dimensional hydrogen-bonded sheet motif. However, only the hydro­chloride structure features organic bilayers and Z′ > 1.

Accepted 24 August 2015

Two different anionic manganese(II) coordination polymers constructed through dicyanamide coordination bridges

In order to explore new metal coordination polymers and to search for new types of ferroelectrics among hybrid coordination polymers, the use of tetra­methyl­ammonium and butyl­tri­phenyl­phospho­nium cations as templates for the formation of two different manganese(II) coordination polymers with dicyanamide was investigated.

Accepted 21 August 2015

An investigation of the electron density of a Jahn–Teller-distorted CrII cation: the crystal structure and charge density of hexa­kis­(aceto­nitrile-κN)chromium(II) bis­(tetra­phenyl­borate) aceto­nitrile disolvate

The crystal structure of a homoleptic CrII complex and a study of its electron density are described. The [Cr(CH3CN)6]2+ species is a high-spin d4 complex with a strong static, rather than dynamic, Jahn–Teller distortion. Topological features of the electron-density distribution are explored and linked to the observed Jahn–Teller distortion.

Accepted 18 August 2015

Unusual centrosymmetric structure of [M(18-crown-6)]+ (M = Rb, Cs and NH4) complexes stabilized in an environment of hexa­chlorido­antimonate(V) anions

In a series of isomorphous compounds, [M(18-crown-6)]+ cations (M = Rb, Cs and NH4) and [SbCl6] anions afford linear stacks, which stablize an unusual centrosymmetric structure of the macrocyclic groups, with the large cations (caesium, rubidium or ammonium) approaching the centre of the 18-crown-6 cavity.

Accepted 18 August 2015

A moderate distortion of the `picket-fence' porphyrin (cryptand-222)potassium chlorido[meso-α,α,α,α-tetra­kis­(o-pivalamido­phenyl)porphyrinato]ferrate(II) n-hexane monosolvate

A moderate distortion of the `picket-fence' porphyrin, (cryptand-222)potassium chlorido[meso-α,α,α,α-tetrakis(o-pivalamidophenyl)porphyrinato]ferrate(II), [K(222)][Fe(TpivPP)Cl], was observed, with the porphyrin core showing significant doming and the Fe atom displaced by 0.62 Å from the porphyrin plane.

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