1-O-Acetyl-3,4,6-tri-O-benzyl-2-C-bromo-methyl-2-de-oxy-α-d-glucopyran-ose.

In the title compound, C30H33BrO6, the pyran-ose ring adopts a chair conformation. Two of the O-benzyl phenyl rings lie almost perpendicular to C/C/C/O plane formed by the ring atoms not attached to these O-benzyl phenyl rings, and form dihedral angles of 85.1 (2) and 64.6 (2)°, while the third O-benzyl phenyl ring is twisted so that it makes a dihedral angle 34.9 (2)° to this C/C/C/O plane. This twist is ascribed to the formation of an S(8) loop stabilized by a weak intra-molecular C-H⋯O hydrogen bond.

2-[(3-Oxo-1-benzofuran-6-yl)-oxy]aceto-nitrile.

The mol-ecule of the title compound, C11H8O3, is essentially planar [r.m.s. deviation = 0.025 (2) Å]. In the crystal, mol-ecules are stacked along [110] but no short π-π contacts are observed. Weak C-H⋯O inter-actions link the mol-ecules into chains along [101].

(4-Ethenylphen-yl)diphenyl-phosphine selenide.

In the title mol-ecule, C(10)H(17)PSe, the P atom has a distorted tetra-hedral environment resulting in an effective cone angle of 165°. The benzene ring makes dihedral angles of 70.04 (8) and 77.28 (8)° with the phenyl rings, while the dihedral angle between the phenyl rings is 62.95 (8)°. In the crystal, mol-ecules are linked by C-H⋯π inter-actions.

Dicyclo-hex-yl[4-(dimethyl-amino)-phen-yl]phosphine selenide.

In the title mol-ecule, C(20)H(32)NPSe, the P atom has a distorted tetra-hedral environment resulting in an effective cone angle of 172°. Weak inter-molecular C-H⋯Se inter-actions are observed.

2-(2-Hy-droxy-propan-2-yl)-6-(prop-2-yn-yloxy)-1-benzofuran-3(2H)-one.

In the title compound, C14H14O4, the prop-2-yn-yloxy O-C-C C plane [maximum deviation = 0.0116 (12) Å] forms a dihedral angle of 78.44 (9)° with the benzofuran-3(2H)-one ring system. In the crystal, mol-ecules are linked by O-H⋯O hydrogen bonds, forming a tape along the a-axis direction. C-H⋯O inter-actions are observed between the tapes.