Synthesis and characterization of Ru(II) complexes with polyfunctional quinazo line-(3H)-4-ones

1066-1069A few Ru(II) complexes of the type Ru (O – N - O)2 with tridentate O – N - O donors and of the type RuCl2(O-N)2 with bidentate O - O and O – N donors have been synthesized and characterized on the basis of analytical, conductivity, thermal, magnetic, IR, electronic and PMR spectral data. The IR and PMR spectral data of the metalcomplexes indicate that the ligands like 2-methyl/phenyl-3- (2'-hydroxybenzalamino) quinazoline-(3H)-4-one (MHBQ/ PHBQ) act as uninegative tridentate, 2-methyl/phenyl- 3-(carboxymethyl) quinazoline-(3H)-4-one (MCMQ/PCMQ) as uninegative bidentate and 2-methyl/phenyl-3-(furfuralamino) quinazoline-(3H)-4-one (MFQ/PFQ), 2-methyl/phenyl-3-(acetamino) quinazoline-(3H)-4-one (MAQ/PAQ), 2-methyl/phenyl 3-(uramino) quinazoline- (3H)-4-one (MUQ/PUQ) and 2-methyl/phenyl-3- thiouramino)quinazoline-(3H)-4-one-(MTUQ/PTUQ) as neutral bidentate ligands.The electronic spectral data of the complexes indicate that the arrangement around Ru(II) is octahedral

Synthesis and spectral studies of ternary complexes of Ni(II) and dioxouranium(VI) with 2-hydroxy-l-naphthaldehyde and some amino acids

1011-1013The 1:1:1 ternary complexes of Ni(II)and dioxouranium( VI) with 2-hydroxy-1-naphthaldehyde (A) and some amino acids have been synthesized and characterized. The IR spectral data of the complexes indicate that histidine, aspartic acid and glutamic acid act as tridentate ligands while glycine, ɑ-alanine, β-alanine, valine, leucine, phenylalanine, serine and threonine act as bidentate ligands coordinating through amino nitrogen and carboxylic oxygen. The electronic spectra of the nickel(II) complexes suggest that they are octahedral. An eight coordination has been proposed for uranyl complexes also

Synthesis & Characterisation of Ternary Complexes of Copper(II) with 2-Hydroxy-1- naphthaldehyde & ɑ-Amino Acids

261-26

Conversion of fructose into 5-hydroxy methyl furfural over Mesoporous-ZrO2-phosphomolybdic acid nanocomposite catalysts

A series of phosphomolybdic acid (MPA) with varying ts contant incorporated into the mesoporous zirconia (ZMPA) catalysts were prepared by surfactant-assisted sol-gel copolymerization technique. These catalysts were evaluated for selective dehydration of fructose to 5-hydroxymethyl furfural (HMF). The catalysts were characterized by X-ray diffraction, nitrogen physisorption, Fourer-Transform infrared, temperature programmed disorption, pyridine adsorbed FT-infrared and transmssion electron microscopy. The characterization results suggest that these catalysts possess ordered mesoporous structure with Keggin heteropoly molybdate. More over the incorporation of phosphomolybdic acid into mesoporous zirconia resulted in generaton of more number of strong acidic sites. These catalysts exhibited about 80 % HMF yield with in 30 min of reaction time. The existence of relatively strong interaction between the MPA keggin units with ZrO2 mesoporous structure played crucial role in fabricating the stable heterogeneous catalyst. This catalyst is reusable with constant activity

Ternary Complexes of Copper(II) with Some Amino Acids & 2-Substituted Benzimidazoles

875-87

Studies on rhodium(lll) complexes with ligands containing amide group

614-616Complexes of Rh(lll) with 2-(acetylamino)benzoic acid, 2-(benzoylamino)benzoic acid, 2-(2-aminobenzoylamino )benzoic acid. 2-(aminobenzanilide), 2-(aminocarbonyl) benzoic acid, 2-[(2-aminophenylamino)-carbonyl]benzoic acid, maleanilic acid, malea-1-naphthalanilic acid, 2-[(phenylamino)carbonyl]benzoic acid, and 2-[(2- naphthalenylamino)carbonyl]benzoic acid have been prepared and characterized by elemental analysis, conductance, thermal, magnetic, infrared, NMR and electronic spectral data. The above data suggest that the complexes are octahedral in geometry

Potentiometric Determination of Ionisation Constants of 3,5-Disubstituted Isoxazoles

982-98

Formation Constants of Metal Chelates of 2' -Hydroxychalkone & 2' -Hydroxy-5' –methylchalkone with Some Bivalent Metal Ions

723-72

Potentiometric Determination of Ionization Constants of 3-Phenyl-l-(2'-hydroxyphenyl)-2-propen-l ones

208-21