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H K Fun

Publications and source records attributed to H K Fun.

At least 37 records · Page 2Linked to original sources
PubMed2001

5-amino-4-(4-diethylaminophenyl)-2-(4-hydroxyphenyl)-7-(pyrrolidin-1-yl)-1,6-naphthyridine-8-carbonitrile.

In the title compound, C29H30N6O, the naphthyridine moiety is planar with a dihedral angle between the fused rings of 1.9 (1) degrees. The phenol ring is nearly coplanar, while the diethylaminophenyl substituent is orthogonal to the central naphthyridine ring and the pyrrolidine ring makes an angle of 11.2 (1) degrees with it. The O atom of the hydroxy substituent is coplanar with the phenyl ring to which it is attached. The molecular structure is stabilized by a C-H...N-type intramolecular hydrogen bond and the packing is stabilized by intermolecular C-H...pi, O-H...N and N-H...O hydrogen bonds.

Crystallography, X-Ray↗
PubMed2001

Bis(O,O'-di-p-tolyldithiophosphato-S,S')(1,10-phenanthroline-N,N')nickel(II).

The title coordination complex, [Ni(C14H14O2PS2)2(C12H8N2)] or [Ni(pMePh-dtp)2(phen)] (phen is 1,10-phenanthroline; dtp is diaryldithiophosphate), has a non-crystallographic twofold axis of symmetry through the Ni atom and the phen moiety. Two O,O-di-p-tolyldithiophosphate (dtp) ions act as bidentate ligands. The central metal atom is coordinated by four S atoms from two dtp groups and two N atoms from the phen ligand. The title compound displays distorted octahedral geometry around the central Ni atom.

Antioxidants↗
PubMed2001

(2-Methylquinolin-8-olato)iron(III) and -copper(II) complexes.

The crystal structures of tris(2-methylquinolin-8-olato-N,O)iron(III), [Fe(C10H8NO)3], (I), and aquabis(2-methylquinolin-8-olato-N,O)copper(II), [Cu(C10H8NO)2(H2O)], (II), have been determined. Compound (I) has a distorted octahedral configuration, in which the central Fe atom is coordinated by three N atoms and three O atoms from three 2-methylquinolin-8-olate ligands. The three Fe-O bond distances are in the range 1.934 (2)-1.947 (2) A, while the three Fe-N bond distances range from 2.204 (2) to 2.405 (2) A. In compound (II), the central Cu(II) atom and H2O group lie on the crystallographic twofold axis and the coordination geometry of the Cu(II) atom is close to trigonal bipyramidal, with the three O atoms in the basal plane and the two N atoms in apical positions. The Cu-N bond length is 2.018 (5) A. The Cu-O bond length in the basal positions is 1.991 (4) A, while the Cu-O bond length in the apical position is 2.273 (6) A. There is an intermolecular OW-H...O hydrogen bond which links the molecules into a linear chain along the b axis.

Journal Article↗
PubMed2001

O-ethyl and o-methyl n-(2,3,4,6-tetra-o-acetyl-beta-d-glucopyranosyl)thiocarbamate.

In both the title structures, O-ethyl N-(2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyl)thiocarbamate, C(17)H(25)NO(10)S, and O-methyl N-(2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyl)thiocarbamate, C(16)H(23)NO(10)S, the hexopyranosyl ring adopts the (4)C(1) conformation. All the ring substituents are in equatorial positions. The acetoxymethyl group is in a gauche-gauche conformation. The S atom is in a synperiplanar conformation, while the C-N-C-O linkage is antiperiplanar. N-H.O intermolecular hydrogen bonds link the molecules into infinite chains and these are connected by C-H.O interactions.

Carbohydrate Conformation↗
PubMed2001

N-Methyl-N-(1-phenylsulfonylindol-2-ylmethyl)aniline.

In the title compound, 2-[(methylphenylamino)methyl]-1-(phenylsulfonyl)indole, C22H20N2O2S, the indole system is not strictly planar and the dihedral angle between the fused rings is 2.7 (1) degrees. The angles around the S atom of the sulfonyl substituent deviate significantly from the ideal value for tetrahedral geometry. The pyramidalization at the indole N atom is very small. Of the two C-H...O interactions, one influences the orientation of indole with respect to the sulfonyl group and the other determines the orientation of the phenyl bound to sulfonyl. The phenyl ring of the sulfonyl substituent makes a dihedral angle of 89.6 (1) degrees with the best plane of the indole. The molecular packing is stabilized by C-H...pi and C-H...O hydrogen bonds.

Aniline Compounds↗
PubMed2001

[3,3'-[2,2'-(ethylenedioxy)dibenzylidene]bis(S-methyl dithiocarbazate)]-nickel](II).

The tetradentate N(2)S(2) Schiff base ligand 3,3'-[2,2'-(ethylenedioxy)dibenzylidene]bis(S-methyl dithiocarbazate) (H(2)L), prepared by the condensation of S-methyl dithiocarbazate with 1,4-bis(2-formylphenyl)-1,4-dioxabutane in a 1:2 molar ratio, reacts with nickel acetate to form the title neutral metal complex, [Ni(C(20)H(20)N(4)O(2)S(4))]. The X-ray structure of the complex shows a distorted square-planar geometry around the Ni atom. The monomeric units are weakly associated into dimers via a long Ni.S interaction [3.569 (1) A]. These dimeric units are then linked by C-H.S intermolecular contacts to form a polymeric chain along the a axis.

Crystallography, X-Ray↗
PubMed2001

catena-Poly[[bis(thiocyanato-N)-lead(II)]-mu-1,2-bis(4-pyridyl)-ethane-N:N'].

In the title coordination polymer, [Pb(NCS)(2)(C(12)H(12)N(2))], the coordination geometry about the Pb(II) atom is a distorted octahedron, composed of two N atoms from bpe ligands [bpe is 1,2-bis(4-pyridyl)ethane], two other N atoms from NCS(-) groups and two neighbouring S atoms through short contacts. The trans-bpe ligands act as bridges between two Pb(II) centres resulting in the formation of a linear chain. The terminal S atoms of the NCS(-) ligands make short contacts with the Pb(II) atom of neighbouring chains to form an infinite two-dimensional polymeric structure.

Journal Article↗
PubMed2001

Bis(O,O'-diisopropyl dithiophosphato-S,S')(1,10-phenanthroline-N,N')metal(II) complexes with cadmium(II) and iron(II).

The two title compounds, [M(C6H14O2PS2)2(C12H8N2)], where M = CdII and FeII, are isomorphous. Each compound has a crystallographic twofold axis of symmetry through the metal atom and the 1,10-phenanthroline molecule. The central metal atom is coordinated to four S atoms from the two dithiophosphate groups and two N atoms from the 1,10-phenanthroline ligand. The environment of the metal atom is a distorted octahedron.

Journal Article↗
PubMed2001

Bis(2-benzyl-1H-benzimidazole-N3)dichlorozinc(II).

In the title compound, [ZnCl2(C14H12N2)2], the environment around the Zn atom is distorted tetrahedral formed by two Cl atoms and two tertiary N atoms of the 2-benzyl-1H-benzimidazole ligands. N-H...Cl intermolecular hydrogen bonds link the molecules into infinite chains in the [101] direction.

Benzimidazoles↗
PubMed2001

Bis[2,2'-ethylenedioxydibenzaldehyde bis(thiocarbohydrazide)] tris(pyridine) solvate.

The title compound, a novel 30-membered 2:2 macrocyclic thiocarbohydrazone, C(34)H(32)N(8)O(4)S(2) x 3C(5)H(5)N, has been prepared and crystallographically characterized. The molecule of the compound is twisted. One dioxabutane group is boat-like in shape, whereas the other is highly disordered. The crystal structure is stabilized by inter- and intramolecular hydrogen bonds.

Journal Article↗
PubMed2001

Bis(dicyclohexylammonium 3-thienylacetate).

The triclinic cell of the title compound contains 2C(12)H(24)N(+) x 2C(6)H(5)O(2)S(-) ion pairs that are linked by four hydrogen bonds [N...O = 2.728 (3) and 2.758 (3) A] across a centre of inversion.

Journal Article↗
PubMed2000

Photoinduced reactions of 1-acetylisatin with phenylacetylenes.

[reaction: see text]Photoinduced reactions of 1-acetylisatin 1 with diphenylacetylenes 2a-2c afforded the corresponding 3-methylene-2-indolones 4a-4e and 5a-5e in 80-90% yields via a spirooxetene intermediate. Similar irradiation of 1 with phenylacetylene, on the other hand, resulted in efficient formation of two diastereoisomeric dispiro[3H-indole-3,2'-furan-3',3"-(3H)-indole]-2,5',2"(2H,5'H,2"H )triones 6 and 7 via a reaction sequence with initial formation of the spirooxetene intermediate. The regioselectivity in the photocycloaddition of 1 with phenylacetylene and the reaction mechanism for the formation of 6 and 7 are discussed.

Acetylene↗