Download citation
Download citation

link to html
The title compound, [CuBr(C7H9N)2], consists of monomeric molecules in which the Cu atom displays trigonal planar coordination, with Cu—N = 1.9970 (15) and 1.9946 (14) Å, and Cu—Br = 2.3422 (3) Å. The packing involves layer formation parallel to (10\bar{2}) by C—H...Br interactions.

Download citation
Download citation

link to html
In the title compound, C19H30Si, the double bonds are essentially localized. The central ring and its substituents, including the triple-bond system, are coplanar, with the Si atom lying 0.148 (2) Å out of the plane. The packing involves herring-bone layers parallel to the ab plane.

Download citation
Download citation

link to html
In the title compound, C24H23ClO4, the side chain displays an extended conformation. The main secondary inter­actions involve a bifurcated hydrogen-bond system (C—H...)2O to the carbon­yl O atom. Each ring is involved in a long C—H...π inter­action.

Download citation
Download citation

link to html
In the title compound, C30H18, the fluorene moiety displays normal dimensions, such as a narrow ring angle of 105.3 (3)° at the 9-position, the atom bearing the exocyclic double bond. The phen­yl rings subtend angles of 14.8 (2) and 3.9 (2)° to the fluorene plane. Mol­ecules are stacked parallel to the short c axis of 4.001 (1) Å.

Download citation
Download citation

link to html
The title compound, C7H7I2NO2+·I·C7H6I2NO2, crystallizes with Z′ = 1 \over 2; the iodide anion lies on a twofold axis, and in the cation/zwitterion adduct the acidic H atom is disordered over an inversion centre. The residues are linked to form zigzag chains in the overall direction [103] by I...I interactions between anion and cation, and by classical O—H...O hydrogen bonds. Weak hydrogen bonds C—H...O link the chains to form layers parallel to (30\overline 1).

Download citation
Download citation

link to html
In the title compound, 2C30H18·3C12H4N4, the asymmetric unit consists of half a formula unit (one quinodimethane mol­ecule displays inversion symmetry). There is no ring stacking; instead, the residues associate by weak C—H...N contacts in planes parallel to (2\overline{1}\overline{1}).

Download citation
Download citation

link to html
The mol­ecule of the title compound, C12H10Br2, displays crystallographic inversion symmetry and is essentially planar. Bond lengths show the typical naphthalene pattern. The crystal packing shows no short H...Br, Br...Br or C—H...π contacts.

Download citation
Download citation

link to html
The title compound, C22H22, displays no crystallographic symmetry. The central benzene ring subtends inter­planar angles of 63.00 (6) and 66.09 (6)° (in opposite senses) to the outer rings. The crystal packing involves two short C—H...π contacts.

Download citation
Download citation

link to html
In the title compound, C22H34Si2, the two independent mol­ecules are closely similar. The reduced rings show a flattened twist conformation. Several features of [2.2]paracyclo­phane strain (e.g. lengthened bridge bonds) are apparent; an exception is furnished by the normal sp2 values of the angles at the bridgehead atoms of the reduced rings.

Download citation
Download citation

link to html
The title compound, C28H52Si4, crystallizes in the uncommon space group I4122 with 222 symmetry. Despite the reduction of the rings, several features of [2.2]paracyclo­phane strain are still apparent.

Download citation
Download citation

link to html
The title compound, C8H8Br4, displays crystallographic inversion symmetry. The packing involves inter­penetrating corrugated layers built up via Br...Br and Br...π contacts.

Download citation
Download citation

link to html
The title compound, C11H20O, shows a wide Me3C—C=C angle of 129.60 (14)°. Mol­ecules associate into zigzag chains parallel to [101] via a hydrogen bond Hmeth­yl...Oketone.

Download citation
Download citation

link to html
The mol­ecule of the title compound, C20H16Br2, displays crystallographic inversion symmetry. Two C—H...Br inter­actions link the mol­ecules into layers parallel to (\overline{1}11). The shortest Br...Br contact is 4.1599 (4) Å.

Download citation
Download citation

link to html
In the title compound, C14H18O4, the central six-membered ring subtends inter­planar angles of 3.5 (1), 78.4 (1) and 78.73 (4)°, respectively, with the five-membered ring, the cyclo­propane ring and the ester side chain. The C-C bond distal to the carbonyl substituent is shortened compared to the other two bonds of the cyclo­propane moiety. The carboxylic acid groups form inversion-symmetric dimers by hydrogen bonding.

Download citation
Download citation

link to html
In the unit cell of the title compound, 11,13,41,43-tetra­hydro-1,4(4,7)-di(benzo[c]thio­phena)cyclo­hexa­phane, C20H20S2, there are four independent but closely similar mol­ecules, each with crystallographic inversion symmetry. The packing is inter­preted in terms of layers formed via C—H...π inter­actions.
Follow Acta Cryst. E
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds