Two neutral iridium complexes with l-alanine as ancillary ligands, (thp)2Ir (l-alanine) (Ir1) (thp = 2-(thiophen-2-yl)pyridine) and (btp)2Ir (Ir2) (btp 2-(benzo[b]thiophen-2-yl)pyridine) were synthesized investigated. The solid-state structures of the developed Ir1 Ir2 authenticated by single X-ray diffraction. Ir(III) exhibit intense yellow red emission respectively high quantum efficiencies (...

Acetylation reaction's product(s) o f 3-[L-threo-2,3,4-trihydroxy-1-(2-naphthylhydrazono)butyl]quinoxalin-2(lH)-one (2b) were found to be dependent on the reaction condition. While the tri-O-acetyl (3b) was isolated in high yield from 2 b under the action o f acetic anhydride/ pyridine mixture, compounds 4 b and 5 b as well as trace o f 3b were obtained when 2 b was heated in acetic anhydride. ...

In the title centrosymmetric zinc(II) complex, [Zn(2)(C(4)H(13)NO(2))(2)(C(6)H(5)N)(2)], each Zn(II) atom is coordinated by two 2-[(2-oxidobenzyl-idene)amino-meth-yl]phenolate (L) ligands and one pyridine (py) mol-ecule in a distorted trigonal-bipyramidal geometry. Each L ligand behaves as a tridentate ligand and provides a phenolate oxygen bridge which links the two Zn(II) atoms. The ZnL(py) u...

Abstract The Pt(II) acetylacetonate complex [(L)Pt(Acac)] based on aminophenyl-substituted 2-(2-thienyl)pyridine (L) was synthesized, its photophysical properties were studied and compared with these for a similar containing no amino group in the ligand. structure of confirmed by X-ray diffraction (CIF file CCDC no. 2144689), 1 H 13 C NMR spectroscopy, ESI mass spectrometry, elemental analysis.

In the title compound, [PdCl(2)(C(19)H(15)N(3))], the Pd(II) centre is four-coordinated by two N-atom donors from one 1-[3-(2-pyrid-yl)pyrazol-1-ylmeth-yl]naphthalene (L) ligand and by two Cl atoms in a distorted square-planar coordination geometry. In the crystal structure, adjacent Pd(II) mononuclear units form inter-molecular C-H⋯π inter-actions involving the benzene and pyridine rings of di...

A series of linear coordination polymers, metallacycles of cadmium(II) and mercury(II) of flexible carboxylic acid ligands, RCH{3-CH(3)-,5-CH(3)-,6-(-OCH(2)CO(2)H)C(6)H(2)}(2), (when R = C(6)H(5), (H(2)L(1)); 2-NO(2)C(6)H(4)- (H(2)L(2)) and 3-NO(2)C(6)H(4)- (H(2)L(3))) are synthesized and characterized. [CdL(1) (py)(3)](n)·3nH(2)O (py = pyridine) is a linear coordination polymer, whereas [CdL(2...

Cultures of actinomycete strain WRAT-210 produced a dark red crystalline metabolite which was named texazone. Spectroscopic evidence suggested that the structure of texazone is 2-(N-methylamino)-3H-phenoxazin-3-one-8-carboxylic acid. The structure was confirmed by chemical synthesis through oxidative dimerization of ethyl 3-amino-4-hydroxybenzoate with 2-(N-methylamino)phenol and subsequent hyd...

In the centrosymmetric polymeric title compound, {[CoGd(2)(C(14)H(8)N(2)O(5))(4)(H(2)O)(4)]·4H(2)O}(n), the Gd(III) cation is coordinated by one water mol-ecule and four pyridine-4-carboxamido-isophthalate (L) anions in a distorted square-anti-prismatic arrangement, while the Co(II) cation, located on an inversion center, is coordinated by two pyridyl-N atoms, two carboxyl-ate-O atoms and two w...

A series of pyridine-bridged 2,6-bis-carboxamide Schiff's bases has been prepared starting from 2,6-pyridinedicarbonyl dichloride (1) and L-alanine or 2-methyl-alanine methyl ester.The coupling of acid chloride 1 with L-alanine methyl ester hydrochloride -or 2-methylalanine methyl ester hydrochloride gave the corresponding 2,6-bis-carboxamide pyridine methyl esters 2a,b.Hydrazonolysis of 2 with...