A new centrosymmetric cyclohexapeptide, aspersymmetide A (1), together with a known peptide, asperphenamate (2), was isolated from the fungus Aspergillus versicolor isolated from a gorgonian coral Carijoa sp., collected from the South China Sea. The chemical structure of 1 was elucidated by analyzing its NMR spectroscopy and MS spectrometry data, and the absolute configurations of the amino aci...

In the title compound, [Ti2(C16H14N2O2)2O2]·2CHCl3, the Ti(IV) atom in the centrosymmetric complex has a distorted octa-hedral N2O4 coordination environment and is linked via two μ2-oxido bridges into a dinuclear centrosymmetric com-plex, with a Ti⋯Ti separation of 2.7794 (8) Å. In the salen (N,N'-ethyl-enebis(salicyl-imine)) ligand, the two salicyl-imine units make a dihedral angle of 45.31 (5...

The title compound, [Ag(C9H6NO)(C9H7NO)], crystallizes as a non-centrosymmetric polymorph. The structure was previously reported by Wu et al. [(2006). Acta Cryst. E62, m281-m282] in the centrosymmetric space group Pbcn. The Ag(I) ion displays a distorted tetra-hedral coordination geometry defined by two N and two O atoms from a neutral quinolin-8-ol ligand (HQ) and a deprotonated quinolin-8-ola...

The presence of a large molecular dipole moment in diphenyl ethers leads unequivocally to a centrosymmetric crystal structure.

We designed and fabricated a centrosymmetric material where one may be able to consider an efficient quadratic nonlinear interaction. We followed a solid phase-supported organic synthesis methodology to covalently bind a large number of highly nonlinear molecules to the surface of polystyrene nanospheres. Such chemically modified optically nonlinear latex spheres, when suspended in water, are s...

The title compound, C(14)H(15)NO, was synthesized from 2-hydroxy-methyl-enecyclo-hepta-none via a Japp-Klingemann acid-catalyzed cyclization. The seven-membered ring exhibits a slightly distorted envelope conformation. N-H⋯O hydrogen bonds form a centrosymmetric dimer; C-H⋯O hydrogen bonds and π-π stacking inter-actions (the centers of the atoms involved in the stacking interaction are separate...

Molecules of (cyclohexylideneamino)oxyacetic acid, C(8)H(13)NO(3), (I), are linked into centrosymmetric dimers by pairs of O-H.O hydrogen bonds [H.O = 1.84 A, O.O = 2.6782 (12) A and O-H.O = 178 degrees ]. In [chloro(phenyl)methyleneamino]oxyacetic acid, C(9)H(8)ClNO(3), (II), the molecules are similarly linked into centrosymmetric dimers by pairs of O-H.O hydrogen bonds [H.O = 1.79 A, O.O = 2....

In the title compound, C(24)H(20)N(2)O(5)S·C(3)H(7)NO, a benzene ring is positioned axially to the pyrimidine ring, which adopts a twist-boat conformation, and is inclined to its mean plane by 85.36 (7)°. In the crystal, inter-molecular C-H⋯O inter-actions result in centrosymmetric head-to-head dimers with an R(2) (2)(14) graph-set motif along the b axis. Pairs of C-H⋯O and O-H⋯O hydrogen bonds...

The crystal structure of the mineral lautite (copper arsenic sulfide), CuAsS, previously described as either centrosymmetric [Pnma; Marumo & Nowacki (1964 ▶). Schweiz. Miner. Petro. Mitt.44, 439-454] or noncentrosymmetric [Pna2(1); Craig & Stephenson (1965 ▶). Acta Cryst.19, 543-547], was reinvestigated by means of single-crystal X-ray diffraction. The centrosymmetric structural model reported ...

The title compound [systematic name: benzoic acid-pyrrolidin-1-ium-2-carboxyl-ate (1/1)], C7H6O2·C5H9NO2, is an example of the application of non-centrosymmetric co-crystallization for the growth of a crystal containing a typically centrosymmetric component in a chiral space group. It co-crystallizes in the space group P212121 and contains benzoic acid and l-proline in equal proportions. The cr...