Zhi-Qiang Feng

3-Methyl-benzene-1,2-diamine.

The title compound, C7H10N2, was synthesized from 2-methyl-6-nitroaniline by a reduction reaction. In the crystal, molecules are linked via N—H⋯N hydrogen bonds, forming two-dimensional networks lying parallel to (100). These networks are stabilized by C—H⋯π and N—H⋯π interactions.

Pd(II) and Zn(II) Based Complexes with Schiff Base Ligands: Synthesis, Characterization, Luminescence, and Antibacterial and Catalytic Activities

Two new metal complexes involving Schiff base ligands, namely, [Pd(L1)2] (1) and [Zn(L2)2] (2), [HL1: 2,4-dibromo-6-((E)-(mesitylimino)methyl)phenol and HL2: 2-((E)-(2,6-diisopropylphenylimino)methyl)-4,6-dibromophenol], have been solvothermally synthesized and characterized by elemental analysis, IR-spectroscopy, thermogravimetric analysis, powder X-ray diffraction, and single-crystal X-ray diffraction. Both 1 and 2 are mononuclear cyclometalated complexes with square planar and tetrahedral coordination geometry, respectively. 1 and 2 display photoluminescence in the solid state at 298 K (fluorescence lifetimes τ = 5.521 μs at 508 nm for 1; τ = 3.697 μs at 506 nm for 2). These Schiff base ligands and their metal complexes have been screened for antibacterial activity against several bacteria strains, and the results are compared with the activity of penicillin. Moreover, the Suzuki reaction of 4-bromoanisole with phenylboronic acid by 1 has also been studied.

2,6-Dichloro-N-(4-methyl­phen­yl)benzamide

In the title compound, C14H11Cl2NO, the two benzene rings are non-coplanar [dihedral angle = 60.9 (3)°]. In the crystal, an amide N—H⋯O hydrogen bond links the molecules into chains which extend along (001).

2-Chloro-5-(chloro­meth­yl)pyridine

The title compound, C6H5Cl2N, is almost planar, with an r.m.s. deviation of 0.0146 Å for all atoms except for the 5-choloromethyl Cl atom. The offset Cl atom lies above this plane with a Cl—C—C angle of 111.11 (17)°. In the crystal, molecules are connected via intermolecular C—H⋯N hydrogen bonds, forming dimers.

2-Amino-4-(2,4-dichloro­phen­yl)-6-(naphthalen-1-yl)nicotinonitrile

In the crystal structure of the title compound, C22H13Cl2N3, the molecules are connected via intermolecular C—H⋯N and N—H⋯N hydrogen bonds, forming a three-dimensional network. The dihedral angles between naphthyl ring system and the pyridyl and benzene rings are 55.04 (7) and 75.87 (7)°, respectively, whereas the pyridyl and benzene rings are oriented at a dihedral angle of 59.56 (8)°.

Methyl 2-{[2,8-bis-(trifluoro-meth-yl)quinolin-4-yl]-oxy}acetate.

In the crystal structure of the title compound, C14H9F6NO3, molecules are connected by intermolecular C—H⋯O hydrogen bonds. The best planes through the benzene and pyridyl rings make a dihedral angle of 1.59 (12)°.

meso-Dimethyl 2,5-dibromo-hexa-ne-dioate.

The title compound, C8H12Br2O4, lies about a crystallographic center of inversion at the midpoint of the central C—C bond. The latter is also repsonsible for the observation of the meso form. There are no intramolecular hydrogen bonds, but molecules are connected by intermolecular C—H⋯O interactions, forming a three-dimensional network.

2-Benzyl-sulfanyl-3-(2,2,2-trifluoro-ethoxy)pyridine.

The title compound, C14H12F3NOS, was synthesized by the reaction of 2-chloro-3-(2,2,2-trifluoroethoxy)pyridine and phenylmethanethiol. The dihedral angle between the aromatic rings is 76.7 (2)°. In the crystal structure, weak aromatic π–π stacking between inversion-related pairs of pyridine rings [centroid-to-centroid separation = 3.776 (2) Å] may help to establish the packing.

Diethyl 2-[(4-bromo-anilino)methyl-idene]malonate.

In the title compound, C14H16BrNO4, intermolecular C—H⋯O hydrogen bonds link the molecules, forming a stable structure. An intramolecular N—H⋯O hydrogen bond results in the formation of a six-membered ring and helps to establish the molecular conformation which is almost planar, with an r.m.s deviation of 0.0842 Å.