NOPR Collection:

Microdetermination of zirconium using 6-chloro-3-hydroxy-2-(2' -furyl)-4H-chromen- 4-one from alkaline solution

2016-07-20T04:49:31Z

Title: Microdetermination of zirconium using 6-chloro-3-hydroxy-2-(2' -furyl)-4H-chromen- 4-one from alkaline solution Authors: Nijhawan, Monica; Kakkar, L R Abstract: A simple, highly sensitive and selective method for determination of zirconium in trace amounts has been developed which is based on the reaction of 6-chloro-3-hydroxy-2-(2'-furyl)-4H-chromen-4-one with the metal ion under alkaline conditions.The coloured complex formed is quantitatively extractable into carbon tetrachloride, whose λ_max lies at 428 nm. The procedure eliminates interference due to several metal ions and obeys Beer's law in the range 0.0-0.5 μg Zr ml^-1 with a Sandell sensitivity of 0.0015 μg Zr cm^-2. Page(s): 1085-1086

Synthesis and structure of trans-dichlorobis (ethylenediamine) cobalt(II) hydrochloride adduct, [Co(en)₂Cl₂].HCI

2016-07-20T04:34:30Z

Title: Synthesis and structure of trans-dichlorobis (ethylenediamine) cobalt(II) hydrochloride adduct, [Co(en)₂Cl₂].HCI Authors: De, Rajib Lal; Bhar, Sanjib K; Samanta, Keka; Banerjee, Indrajit; Maiti, Kamales; Mukherjee, Alok K; Samanta, Chitra Abstract: Stabilisation of [Co(en)₂Cl₂].HCI adduct is established on the basis of IR , electronic spectral magnetic and voltammetric studies and finally confirmed by X-ray structure analysis. Page(s): 1063-1065

Complex heterobimetallic salts derived from 1-ethoxycarbonyl-1-cyanoethylene- 2,2-dithiolatodioxouranate(VI) ion: Preparation and properties

2016-07-20T04:15:35Z

Title: Complex heterobimetallic salts derived from 1-ethoxycarbonyl-1-cyanoethylene- 2,2-dithiolatodioxouranate(VI) ion: Preparation and properties Authors: Singh, Nanhai; Gupta, Sunita Abstract: The reaction of K₂[UO₂ (ecda)₂] (generated in situ) with cationic complexes [M(N-N)₃X₂ [M = Fe(II), Ru(II) , Co(II), Ni(II), Cu(II), Zn(II) or Cd(II); N-N = 2,2'-dipyridyl (dipy), 1,10-phenanthroline (phen) or ethylenediamine (en); ecda^2- = 1-ethoxycarbonyl-1-cyanoethylene-2,2-dithiolate; X = Cl^-, NO₃^- or 1/2SO₄^2-] and n-Pr₄NI in 1:1/1:2 molar ratio afforded the complex bimetallic salts [M(N-N)₃][UO₂(ecda)₂] and the complex salt [n-Pr₄N]₂ [UO₂ (ecda)₂], that have been characterized on the basis of elemental analyses, molar conductance and magnetic susceptibility measurements, electrochemical and relevant spectroscopic studies. UV -visible absorption spectra in DMSO support the existence of ion-pair charge transfer (IPCT) absorption band which occurs due to charge transfer interaction between [Fe(phen)₃/Ru(dipy)₃]²⁺ and [UO₂(ecda)₂]^2- ion. Temperature dependent (303-373 K) pressed pellet conductivities of the complexes have been studied. All the bimetallic salts of this series comprise discrete tris-chelated octahedral cations [M(N-N)₃]²⁺ and bis-chelated dioxouranium(-VI ) anion, [UO₂(ecda)₂]^2- with no sign of ligand exchange reaction in solution during the course of their formation . Page(s): 997-1009

Crystal structure of cationic complex of 2[Co^III (APOTSC)₂]⁺[Co^IICI₄]^2-

2016-07-20T05:15:49Z

Title: Crystal structure of cationic complex of 2[Co^III (APOTSC)₂]⁺[Co^IICI₄]^2- Authors: Murugkar, Anupa; Bendre, Ratnamala; Kumbhar, Avinash; Padhye, Subhash; Pritchard, Robin; McAuliffe, C.A. Abstract: The reaction between ⁴N-dimethyl-2-acetylpyridine-N-oxide thiosemicarbazone (HAPOTSC) ligand and cobalt chloride leads to the formation of a cationic complex containing two thiolato N-oxide thiosemicarbazone ligands, which has been characterized by spectroscopic and X-ray crystallographic studies. Page(s): 977-980

NOPR Collection:

Microdetermination of zirconium using 6-chloro-3-hydroxy-2-(2' -furyl)-4H-chromen- 4-one from alkaline solution

Synthesis and structure of trans-dichlorobis (ethylenediamine) cobalt(II) hydrochloride adduct, [Co(en)2Cl2].HCI

Complex heterobimetallic salts derived from 1-ethoxycarbonyl-1-cyanoethylene- 2,2-dithiolatodioxouranate(VI) ion: Preparation and properties

Crystal structure of cationic complex of 2[CoIII (APOTSC)2]+[CoIICI4]2-

Synthesis and structure of trans-dichlorobis (ethylenediamine) cobalt(II) hydrochloride adduct, [Co(en)₂Cl₂].HCI

Crystal structure of cationic complex of 2[Co^III (APOTSC)₂]⁺[Co^IICI₄]^2-