The structure of the title compound, C 30 H 42 N 4 O 2 , has orthorhombic ( Pbca ) symmetry. This compound comprises a 4-amino-1,8-naphthalimide core with 2,2,6,6-tetramethyl-4-piperidinyl substituent bonded to each nitrogen atom. displays N—H...O hydrogen bonding. exhibits disorder main molecule.

In the title polymeric complex, [HgBr(2)(C(10)H(14)N(2))](n), each nicotine mol-ecule is bonded to two adjacent Hg atoms, one through the pyrrolidine N atom and the other through the pyridine N atom, forming zigzag chains along [010]. The coordination around mercury is completed by two bromido ligands resulting in a distorted tetra-hedral arrangement.

Bistable N-H···N hydrogen bonds between rotors and stators enable delicate modulation of dynamic molecular motion by slowing down the fast rotation in a N-H···N hydrogen-bonded organic co-crystal of 1,2-diazabicyclo(2.2.2)octane bis(thiourea), which has been elucidated by the combination of variable-temperature (VT) X-ray structure analyses and VT solid-state nuclear magnetic resonance techniques.

OBJECTIVES The objective was to determine the fracture and cyclic fatigue properties of composite-dentin beams bonded with a self-etching adhesive in four-point bend. METHODS Beams of rectangular cross-section were shaped to a size of approximately 0.87mmx0.87mmx10mm and placed in a four-point bending apparatus, with the loading points 1.8 and 7.2mm apart, with the interface centered between ...

In the title compound, [Mn(N(3))(2)(C(6)H(6)N(4))(2)], the Mn atom (site symmetry ) is bonded to two azide ions and two bidentate biimidizole ligands, resulting in a slightly distorted octa-hedral MnN(6) geometry for the metal ion. In the crystal structure, N-H⋯N hydrogen bonds help to consolidate the packing.

In the title compound, [Cu(C(14)H(13)N(2)O(2))(NCS)(C(3)H(7)NO)], the Cu(2+) ion is coordinated by an N,N',O-tridentate 2-meth-oxy-6-(2-pyridylmethyl-imino-meth-yl)phenolate ligand, an N-bonded thio-cyanate ion and an O-bonded dimethyl-formamide (DMF) mol-ecule, resulting in a distorted CuN(3)O(2) square-based pyramidal geometry for the metal ion, with the DMF O atom in the apical site. The dih...

In the title salt, C(6)H(9)N(2) (+)·C(8)H(5)O(4) (-), the hydrogen phthalate anion is essentially planar, with a maximum deviation of 0.011 (2) Å. In the crystal structure, the protonated N atom of the pyridine ring and the 2-amino group of the cation are hydrogen bonded to the carboxyl-ate O atoms of the anion via a pair of N-H⋯O hydrogen bonds, forming an R(2) (2)(8) ring motif. In the hydrog...

In the title compound, [Cu(C(14)H(9)N(2)O(2))(2)]·2H(2)O, the Cu(II) ion lies on a centre of symmetry and is four-coordinated by two N atoms and two O atoms from two 2-(1H-benzimidazol-2-yl)benzoate ligands in a square-planar environment. The benzimidazol and benzyl rings form a dihedral angle of 42.8 (5)°. The mol-ecule contains two H-bonded carboxyl O acceptors and two H-bonded N-H donors in ...

Several series of novel banana-shaped H-bonded symmetric trimers (with two H-bonds) and asymmetric heterodimers (with one H-bond) were self-assembled by appropriate molar ratios of proton donors (H-donors) and acceptors (H-acceptors). The influences of H-bonded linking positions and aromatic ring numbers (4-8 aromatic rings in the rigid cores) as well as the chain lengths (n, m = 12 or 16, resp...

In the title compound, C(13)H(14)N(2)O(4)S(2) (alternative names: diphenyl-methane-4,4'-disulfonamide, nirexon, CRN: 535-66-0), the two benzene rings form a dihedral angle of 70.8 (1)°. There are two sets of shorter (H⋯O < 2.1 Å) and longer (H⋯O > 2.4 Å) N-H⋯O hydrogen bonds per sulfonamide NH(2) group, which together result in hydrogen-bonded sheets parallel (102). Adjacent sheets are connecte...