5-(4-Methyl­phenyl­sulfon­yl)-1,3-dithiolo[4,5-c]pyrrole-2-thione

The asymmetric unit of the title compound, C12H9NO2S4, contains one half-mol­ecule with the N, two S amd four C atoms lying on a mirror plane. The mol­ecule exhibits a V-shaped conformation, with a dihedral angle of 87.00 (7)° between the benzene and dithiol­opyrrole rings. The methyl group was treated as rotationally disordered between two orientations in a 1:1 ratio. In the crystal, weak C—H⋯O hydrogen bonds link the mol­ecules into chains in [010]

4,6,7,9,10,12,13,15,16,18-Decahydro-1,3-dithiolo[4,5-l][1,4,7,10,15]trioxadithia­cyclo­hepta­decine-2-thione

The title compound, C13H20O3S5, is bis­ected by a crystallographic twofold rotation axis, which relates the two halves of the mol­ecule to one another: one S, one C and one O atom lie on the axis. The thione S atom lies in the plane of the five-membered rings with an r.m.s. deviation of 0.0042 (5) Å. Parts of the 17-membered macrocycle were refined using a two-part disorder model [occupancies of 0.553 (14) and 0.447 (14)]. There are no noteworthy inter­molecular inter­actions

2-[4,5-Bis(butyl­sulfan­yl)-1,3-dithiol-2-yl­idene]-5-methyl-5H-1,3-dithiolo[4,5-c]pyrrole-4-carbaldehyde

In the title compound, C18H23NOS6, the dithiol­opyrrole ring is almost planar [r.m.s. deviation = 0.044 (3) Å] and makes a dihedral angle of 25.11 (7)° with the dithiole ring. In the crystal, pairs of neighboring mol­ecules are connected by weak inter­molecular C—H⋯O inter­actions. These dimers are further linked into a chain along [110] by C—H⋯O inter­actions

2,3-[(3,6-Dioxaoctane-1,8-diyl)bis(sul­fanediylmethylene)]-6,7-bis(methylsulfanyl)-1,4,5,8-tetra­thia­fulvalene

In the title mol­ecule, C16H22S8O2, two S atoms, two O atoms and ten C atoms form a 14-membered ring with a boat conformation. In the crystal, C—H⋯O hydrogen bonds link the mol­ecules into dimers which are further connected into a chain along the a axis by C—H⋯S hydrogen bonds

4,6,7,9,10,12,13,15-Octa­hydro-2H-1,3-dithiolo[4,5-i][1,4,7,12]dioxadithia­cyclo­tetra­decine-2-thione

In the title mol­ecule, C11H16O2S5, the two S atoms from the macrocycle are situated on opposite sides of the mean plane of the five-membered ring, deviating from it by 1.288 (3) and 1.728 (3) Å. In the crystal, weak inter­molecular C—H⋯S and C—H⋯O hydrogen bonds link the mol­ecules into layers parallel to (100). The crystal studied was a racemic twin

13-[4,5-Bis(methyl­sulfan­yl)-1,3-dithiol-2-yl­idene]-6-oxa-3,9,12,14-tetra­thia­bicyclo­[9.3.0]tetra­dec-1(11)-ene

In the title mol­ecule, C14H18OS8, one O atom, two S atoms and six C atoms form an 11-membered ring with a chair-like conformation; the planes of the two five-membered rings connected by a carbon–carbon double bond form a dihedral angle of 29.97 (11)°. In the crystal, pairs of weak inter­molecular C—H⋯S hydrogen bonds link two mol­ecules into inversion dimers

Structural Behavior of Thin-Walled Concrete-Filled Steel Tube Used in Cable Tunnel: An Experimental and Numerical Investigation

One steel grid and five thin-walled concrete-filled steel tubes (CTST) used as the supports of tunnel were tested in site for investigating the mechanical behavior. The mechanical influences of thickness, node form, and concrete on CTST were gained and compared with the impacts on steel grid. It is indicated that high antideformation capacity of CTST improved the stability of surrounding rock in short time. The cementitious grouted sleeve connection exhibited superior flexibility when CTST was erected and built. Although the deformation of rock and soil in the tunnel was increasing, good compression resistance was observed by CTST with the new connection type. It was also seen that vault, tube foot, and connections were with larger absolute strain values. The finite element analysis (FEA) was carried out using ABAQUS program. The results were validated by comparison with experimental results. The FE model could be referred by similar projects

2,3-(3,6,9-Trioxaundecane-1,11-diyl­disulfan­yl)-1,4,5,8-tetra­thia­fulvalene-6,7-dicarbonitrile

In the title compound, C16H16N2O3S6, the two five-membered rings form a dihedral angle of 7.86 (9)°. Weak C—H⋯N hydrogen bonds link the mol­ecules to form a chain along c; the chains are further connected by weak C—H⋯O hydrogen bonds to form a three-dimensional supra­molecular network

4,6,7,9,10,12-Hexahydro-1,3-dithiolo[4,5-f][1,4,9]oxadithia­cyclo­undecine-2-thione

In the title mol­ecule, C9H12S5O, the five-membered ring and attached S atom are essentially coplanar [mean deviation from the mean plane = 0.020 (1) Å]. The two S atoms belonging to the macrocycle deviate from this plane by 1.005 (1) and 1.337 (2) Å. In the crystal, π–π inter­actions link the mol­ecules into centrosymmetric dimers with a short distance of 3.753 (5) Å between the centroids of the five-membered rings