The Chevrel phase In4.07Mo15S11.87Se7.13 with mixed chalcogenide occupancy

The single-crystal of the title compound, indium pentadecamolybdenum nonadeca(sulfide/selenide), was obtained by solid state reaction with an S/Se mixture. It adopts the structure type of In3Mo15Se19 and In3.7Mo15S19, which are non-substituted Chevrel phases in the space group P63/m. The Mo, one S/Se and two In sites have point symmetry m.. and two S/Se and one In atoms are in 3.. sites. This compound contains isolated Mo6 and Mo9 clusters. The shapes of clusters are octa­hedral and confacial biocta­hedral, respectively, face-capped by chalcogen atoms over each triangle face. The Mo—X bonds (X = S, Se) play an important role for the constitution of the framework. The Mo—X distances of 2.479 (2)–2.6687 (9) Å are within the ranges of average values of Mo—S and Mo—Se distances. The In atoms located on sites with m.. symmetry are partially occupied

4-Hydroxy­phenyl 4-fluoro­benzoate

In the title compound, C13H9FO3, the dihedral angle between the two benzene rings is 59.86 (4)°. In the crystal, inter­molecular O—H⋯H hydrogen bonds lead to molecular chains propagating in [010]

anti-9,10-Di(1-naphth­yl)anthracene pyridine disolvate

In the title compound, C34H22·2C5H5N, there is a crystallographic inversion center in the middle of the anthracene ring system. The dihedral angle between the mean planes of the anthracene and naphthalene ring systems is 83.96 (4)°. The crystal structure is stabilized by weak inter­molecular C—H⋯N and C—H⋯π inter­actions

Dichlorido[N,N-diethyl-N′-(2-pyridyl­methyl­ene)ethane-1,2-diamine]mercury(II)

The Hg atom in the title compound, [HgCl2(C12H19N3)], adopts a distorted trigonal-bipyramidal geometry, being ligated by two Cl atoms and three N atoms of the N,N-diethyl-N′-(2-pyridylmethyl­ene)ethane-1,2-diamine ligand. The dihedral angle between the HgN3 and HgCl2 least-squares planes is 88.6 (1)°. The Hg—N distances including the pyridine N and the ammonium N atom are about 0.20 Å longer than the Hg—N distance including the imino N atom

Mechanical Properties of Fiber Reinforced Lightweight Concrete Containing Surfactant

Fiber reinforced aerated lightweight concrete (FALC) was developed to reduce concrete's density and to improve its fire resistance, thermal conductivity, and energy absorption. Compression tests were performed to determine basic properties of FALC. The primary independent variables were the types and volume fraction of fibers, and the amount of air in the concrete. Polypropylene and carbon fibers were investigated at 0, 1, 2, 3, and 4% volume ratios. The lightweight aggregate used was made of expanded clay. A self-compaction agent was used to reduce the water-cement ratio and keep good workability. A surfactant was also added to introduce air into the concrete. This study provides basic information regarding the mechanical properties of FALC and compares FALC with fiber reinforced lightweight concrete. The properties investigated include the unit weight, uniaxial compressive strength, modulus of elasticity, and toughness index. Based on the properties, a stress-strain prediction model was proposed. It was demonstrated that the proposed model accurately predicts the stress-strain behavior of FALC

Bis(3-methyl­pyridinium) tetra­chlorido­cuprate(II)

The title compound, (C6H8N)2[CuCl4], is composed of two 3-methyl­pyridinium cation and one tetra­chloridocuprate(II) anion. The geometry around the copper(II) ion is that of a distorted tetra­hedron. In the crystal structure, the anions and cations are linked by three different N—H⋯Cl hydrogen bonds. In addition, the crystal structure exhibits aromatic π–π inter­actions between the pyridinium rings of two discrete units [centroid–centroid distance = 3.704 (2) Å]

[Bis(2-pyridylmeth­yl)amine]dichloridomercury(II)

The Hg atom in the title complex, [HgCl2(C12H13N3)], adopts a square-pyramidal geometry, being ligated by three N atoms of the tridentate bis­(2-pyridylmeth­yl)amine ligand and two Cl atoms, with one of the latter occupying the apical position. Disorder is noted in the amine portion of the ligand and this was modelled over two sites, with the major component having a site-occupancy factor of 0.794 (14)

N-(3,4-Difluoro­phen­yl)-2-(3,4-dimethoxy­phen­yl)acetamide

In the title amide, C16H15F2NO3, the dihedral angle between the benzene rings is 53.7 (1)°. Mol­ecules are linked in the crystal structure by an inter­molecular N—H⋯O hydrogen bond involving N—H and C=O functionalities of the amide group. A one-dimensional network is thus formed along the [001] direction. No significant inter­chain contacts are observed

[Benzyl(2-pyridylmeth­yl)amine]dichloridomercury(II)

The Hg atom in the title compound, [HgCl2(C13H14N2)], adopts a distorted tetra­hedral geometry, being ligated by two N atoms of the benzyl(2-pyridylmeth­yl)amine (bpma) ligand and two Cl atoms. The dihedral angle between the least-squares planes through the chelate ring and Cl—Hg—Cl atoms is 85.4 (1)°. The phenyl ring on the bpma ligand is twisted out of the pyridine plane, forming a dihedral angle of 76.0 (3)°. Disorder in this ring is also noted with two coplanar conformations having equal site occupancies