In the title compound, C(17)H(14)O(3), the dihedral angle between the phenyl ring and the benzene ring of the chromanone moiety is 67.78 (3)°. The six-membered heterocyclic ring of the chromanone moiety adopts a half-chair conformation. The structure is stabilized by weak inter-molecular C-H⋯O inter-actions that link the mol-ecules into inversion dimers.

In the mol-ecule of the title compound, C(19)H(17)ClN(2)O, the heterocyclic six-membered ring adopts a half-chair conformation, while the pyrrolidine ring has an envelope conformation. In the crystal structure, C-Cl⋯π [Cl⋯centroid = 3.680 (2) Å] inter-actions and van der Waals forces are present.

In the crystal of the title compound, C(14)H(15)NO(4), pairs of inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric R(2) (2)(10) dimers. These dimers are further connected via inter-molecular C-H⋯O hydrogen bonds, forming a three-dimensional network. The heterocyclic ring adopts a twisted conformation.

A novel NHC–palladium(II) (NHC = N-heterocyclic carbene) complex and its immobilised version have been prepared and fully characterised. Optimisation studies led to good catalytic activities in Suzuki-Miyaura cross coupling and chloroarene dehalogenation reactions. Furthermore, the unexpected palladium-mediated transfer hydrogenation of a carbonyl compound is reported.

In the title compound, C(11)H(12)N(2)O(4), a new hydroxamic acid which belonging to the isoquinole family, the heterocyclic ring adopts a half-chair conformation. The nitro group is essentially coplanar with the aromatic ring. Inter-molecular O-H⋯O hydrogen bonds assemble the mol-ecules around inversion centres to form pseudo-dimers.

The title compound, C(16)H(20)N(2)O(2), was obtained by catalytic asymmetric cyclo-addition of trans-3-propyl-acrolein with 1-benzyl-idenepyrazolid-3-one betaine. There are two symmetry-independent mol-ecules in the asymmetric unit. In both mol-ecules, the two five-membered heterocyclic rings adopt envelope conformations.

A C(4)-bound palladium-N-heterocyclic carbene (4) was selectively obtained from the C(2)-unsubstituted imidazolium salt 3. The higher stability of the C(4) versus the C(2)-bound carbene complex due to pyridine chelation assistance allowed this mesoionic compound to be obtained.

In the title compound, [Eu(C(9)H(10)NS(2))(3)(C(12)H(8)N(2))], the Eu(III) atom exists in a distorted square-anti-prismatic coordination geometry. Both dithio-carbamate and the N-heterocyclic ligands function in a chelating mode.

In the title compound, C29H32N2O2, the piperidine ring exists in a chair conformation (the bond-angle sum at the sp (2)-hybridized C atom is 359.79°). The phenyl rings and the methyl group substituted on the heterocyclic ring are in equatorial orientations. In the crystal, pairs of C-H⋯π inter-actions result in the formation of inversion dimers.

The title compound, C(15)H(21)NO(2)S, synthesized by N-alkyl-ation of cyclo-hexyl-amine benzene-sulfonamide with allyl iodide, is of inter-est as a precursor to biologically active sulfur-containing heterocyclic compounds. The cyclo-hexane ring is in a chair form and its mean plane makes a dihedral angle of 53.84 (12)° with the phenyl ring.