The purpose of the study is to estimate the optimal release conditions for male and female world discus record holders of 1998 under no wind and in the wind. The estimation was achieved by using numerical methods to deal with the lift and drag coefficients in Ganslen’s wind tunnel tests of discus. The results showed that under no wind, when the release height of both male and female holders was...

Given a set S of n points in the plane and a fixed angle 0 < ω < π, we show how to find all triangles of minimum area with angle ω that enclose S in O(n log n) time.

The title compound, C(12)H(10)Cl(2)N(2)S(2), features an S-S bond [2.0671 (16) Å] that bridges two 4-amino-2-chloro-phenyl rings with a C-S-S-C torsion angle of -84.2 (2)°. The two benzene rings are twisted with respect to each other at a dihedral angle of 39.9 (2)°. Inter-molecular N-H⋯S hydrogen bonding is present in the crystal structure.

The title compound, [Zn(C(15)H(14)N(3)S(2))(2)], contains two chemically equivalent Schiff base anions that are coordinated to the Zn(II) ion as tridentate N,N',S-chelating ligands, creating a distorted octa-hedral environment [the smallest angle being 75.40 (6)° and the widest angle being 162.87 (6)°], with the two S atoms in cis positions. The dihedral angle between the mean planes of the two...

The title compound, C12H6Cl4S2, features an S-S bond [2.0252 (8) Å] that bridges two 2,3-di-chloro-phenyl rings with a C-S-S-C torsion angle of 88.35 (11)°. The benzene rings are normal one to the other with a dihedral angle of 89.83 (11)°. The crystal structure features inter-molecular Cl⋯Cl [3.4763 (11) Å] and π-π stacking inter-actions [centroid-centroid distances = 3.696 (1) and 3.641 (2) Å...

In the title disulfide, C(16)H(18)S(2), the mol-ecule is twisted about the central S-S bond [the C-S-S-C torsion angle = 93.24 (7)°] and the dihedral angle between the benzene rings is 72.84 (7)°, indicating an almost orthogonal relationship; the methyl groups are orientated to the same side of the mol-ecule. The crystal packing features C-H⋯.π inter-actions which consolidate a three-dimensiona...