2-(2,3,5,6-Tetra­methyl­benzyl­sulfan­yl)pyridine N-oxide

In the title compound, C16H19NOS, the durene ring and the oxopyridyl ring form a dihedral angle of 82.26 (7)°. The crystal structure is stabilized by inter­molecular C—H⋯O hydrogen bonds, weak C—H⋯π inter­actions and π–π inter­actions [centroid–centroid distance of 3.4432 (19) Å], together with intra­molecular S⋯O [2.657 (2) Å] short contacts

catena-Poly[[aqua­sodium(I)]-μ-[2,2′-(disulfanedi­yl)bis­(pyridine N-oxide)]-μ-(pyridine-2-thiol­ato 1-oxide)]

There are two monomeric units in the asymmetric unit of the polymeric title compound, [Na(C5H4NOS)(C10H8N2O2S2)(H2O)]n. The NaI ions are six coordinated by four O atoms, one S atom and one water mol­ecule, forming a slightly distorted octa­hedral geometry. An intra­molecular O—H⋯O hydrogen bond stabilizes the conformation of the mol­ecule. The crystal packing is consolidated by inter­molecular O—H⋯O, O—H⋯N and O—H⋯S hydrogen bonds, π–π inter­actions [with centroid–centroid distances of 3.587 (2) Å] together with weak C—H⋯π inter­actions. The mol­ecules are linked into polymeric chains along the b-axis direction

2-(Mesitylmethyl­sulfan­yl)pyridine N-oxide–18-crown-6 (2/1)

In the title compound, 2C15H17NOS·C12H24O6, the asymmetric unit consists of one N-oxide derivative and one-half of the 18-crown-6 ether, which lies on an inversion centre. In the crown ether, the O—C—C—O torsion angles indicate a gauche conformation of the ethyl­eneoxy units, while the C—O—C—C torsion angles indicate planarity of these segments. In the N-oxide unit, the dihedral angle between the pyridine and benzene rings is 85.88 (12)°. The crystal packing is stabilized by weak C—H⋯O hydrogen bonds and C—H⋯π inter­actions

Synthesis and Tribological Properties of WSe₂Nanorods

<p>Abstract</p> <p>The WSe₂nanorods were synthesized via solid-state reaction method and characterized by X-ray diffractometer, TEM, and HRTEM. The results indicated the WSe₂compounds had rod-like structures with diameters of 10&#8211;50 nm and lengths of 100&#8211;400 nm, and the growth process of WSe₂nanorods was discussed on the basis of the experimental facts. The tribological properties of WSe₂nanorods as additives in HVI500 base oil were investigated by UMT-2 multispecimen tribotester. Under the determinate conditions, the friction coefficient of the base oil containing WSe₂nanorods was lower than that of the base oil, and decreased with increasing mass fraction of WSe₂nanorods when it was &lt;7 wt.%. Moreover, the base oil with the additives was rather suited to high load and high rotating speed. A combination of rolling friction, sliding friction, and stable tribofilm on the rubbing surface could explain the good friction and wear properties of WSe₂nanorods as additives.</p