scholarly journals Synthesis and Structural Characterization of Lanthanum(III) Complexes of 4-Nitrosoantipyrine

2021 ◽  
Vol 33 (3) ◽  
pp. 617-621
Author(s):  
Meera Gopal ◽  
Sreesha Sasi
Keyword(s):  
Magnetic Susceptibility ◽  
Spectral Data ◽  
General Formula ◽  
Structural Characterization ◽  
Bidentate Ligand ◽  
Bidentate Ligands ◽  
Nitroso Group ◽  
Physico Chemical ◽  
Chemical Studies

A new series of La(III) complexes of the ligand with the general formula [La(L)2(a)3] and [La2(L)4(aa)3], (a = nitrate (1), thiocyanate (2), acetate (3) and propionate (4) ions, aa = sulphate (5), thiosulphate (6), oxalate (7) and malonate (8) ions with the ligand 4-nitrosoantipyrine (L) were synthesized and characterized using various physico-chemical studies. The primary ligand L acts as a bidentate ligand utilizing the carbonyl group and the nitroso group for bonding. The nitrate, thiocyanate, acetate and propionate ions are monovalent unidentate ligands, whereas sulphate, thiosulphate, oxalate and malonate ions are divalent bidentate ligands in the complexes 1-8. Based on spectral data and magnetic susceptibility measurements, geometry of the lanthanum(III) complexes were also proposed.

scholarly journals Synthesis and Characterization of Novel Methyl 2-(1,7,7-Tri methylbicyclo[2.2.1]hept-2-yieldene)hydrazinecarbodithioate Schiff Bases Derived From Methylhydrazine carbodithioate And Their Bi(III) And Ag(II) Complexes

2013 ◽  
Vol 10 (3) ◽  
pp. 607-617
Author(s):  
Baghdad Science Journal
Keyword(s):  
Metal Complexes ◽  
General Formula ◽  
Schiff Bases ◽  
Synthesis And Characterization ◽  
Bidentate Ligands ◽  
Physico Chemical ◽  
Elemental Analyses ◽  
Bismuth Salts ◽  
Chemical Techniques

Novel bidentate Schiff bases having nitrogen-sulphur donor sequence was synthesized from condensation of racemate camphor, (R)-camphor and (S)-camphor with Methyl hydrazinecarbodithioate (SMDTC). Its metal complexes were also prepared through the reaction of these ligands with silver and bismuth salts. All complexes were characterized by elemental analyses and various physico-chemical techniques. These Schiff bases behaved as uninegatively charged bidentate ligands and coordinated to the metal ions via ?-nitrogen and thiolate sulphur atoms. The NS Schiff bases formed complexes of general formula, [M(NS)2] or [M(NS)2.H2O] where M is BiIII or AgI, the expected geometry is octahedral for Bi(III) complexes while Ag(I) is expected to oxidized to Ag(II) forming square planner complexes.

scholarly journals Investigation on a Bangladeshi isolate Bacillus aryabhattai for promising biotechnological applications

2018 ◽  
Vol 7 (2) ◽  
pp. 33-45
Author(s):  
Mohammad Shahedur Rahman ◽  
Rasheda Banu ◽  
Ripa Moni ◽  
Nazmul Islam ◽  
Mastura Khatun Ruma ◽  
...  
Keyword(s):  
Soil Sample ◽  
Extracellular Enzymes ◽  
Extreme Conditions ◽  
Biotechnological Applications ◽  
Optimum Temperature ◽  
First Report ◽  
Bacillus Aryabhattai ◽  
Physico Chemical ◽  
Chemical Studies

A new isolate was investigated from soil sample collected from Shahrasti upazilla of Chandpur district of Bangladesh. Based on the physico-chemical studies the strain was identified as gram positive Bacilli. Moleculer characterization of the strain was identified as Bacillus aryabhattai which is the first report in Bangladesh. The strain can survive in extreme conditions of salt, temperature and pH. This strain was further characterized and screened for the ability to produce useful enzymes. The optimum temperature for growth and production of these enzymes was within the temperature range 35oC to 40oC. The pH was found to be 7 for its growth and production of different enzymes when investigated over 48 h of incubation. The isolate produced various extracellular enzymes such as α-amylases, cellulases, β-glucosidases, lipases and proteases. The findings of this study provide useful information of the new strain that has potential biotechnological applications. Jahangirnagar University J. Biol. Sci. 7(2): 33-45, 2018 (December)

Chemistry of Alkoxo Complexes, Part III *Synthesis and Characterization of Some Mono(carboxylato)mono (alkoxo)nickel(II) Complexes

1979 ◽  
Vol 34 (3) ◽  
pp. 459-463 ◽  
Author(s):  
B. P. Baranwal ◽  
G. K. Parashar ◽  
R. C. Mehrotra
Keyword(s):  
Molecular Weight ◽  
Magnetic Susceptibility ◽  
General Formula ◽  
Synthesis And Characterization ◽  
Probable Structure ◽  
Equimolar Ratio ◽  
Elemental Analyses ◽  
Infra Red ◽  
Interchange Reactions

AbstractA number of mono(carboxylato)mono(alkoxo)nickel(II) complexes of the general formula, Ni(OR)(OOCR′), (with R′ = C13H27, C15H35 and C17H35) have been synthesized (where R = Me and Pri) by the reactions of nickel methoxide and isopropoxide with the respective carboxylic acids in equimolar ratio and (where R = Et and But) by alcohol interchange reactions. A study of the molecular weight, infra-red and electronic reflectance spectra and magnetic susceptibility in addition to elemental analyses has been carried out to throw some light on the probable structure of these derivatives.

Characterization of the adducts of bis(O-isoamyldithiocarbonato) nickel(II) with heterocyclic amines and X-ray structure of bis(O-isoamyldithiocarbonato)-bis(3-bromopyridine)nickel(II)

2016 ◽  
Vol 57 (8) ◽  
pp. 1688
Keyword(s):  
Magnetic Susceptibility ◽  
Spectral Data ◽  
Metal Ion ◽  
Diffraction Method ◽  
Bidentate Ligand ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cell Parameters ◽  
Infrared Spectral ◽  
Substituted Pyridines

A series of six-coordinated Ni(II) complexes, with the general formula Ni(Xan)L2 (where Xan = isoamyldithiocarbonato and L = 2-bromopyridine, 3-bromopyridine, 4-acetylpyridine, 3-hydroxypyridine and 2-methoxypyridine) are synthesized and characterized by the elemental analysis and various physicochemical techniques such as magnetic susceptibility and conductivity measurements, UV-visible and infrared spectral data. Based on the electronic spectra and magnetic susceptibility measurements, an octahedral geometry is proposed for all the complexes. IR spectral data show that in all these complexes substituted pyridines coordinate to the metal ion through nitrogen atoms occupying the fifth and sixth axial positions, whereas O-alkyldithiocarbonate acts as a monoanion bidentate ligand and occupies the planar positions of octahedral structures. The structure of the adduct with 3-bromopyridine is elucidated by the single crystal X-ray diffraction method. The complex crystallizes in the triclinic space group P-1 with unit cell parameters a = 6.5855(4) Å, b = 9.4984(6) Å, c = 12.4518(8) Å, α = 87.944(5)°, β = 78.843(5)°, γ = 77.794(5)°. The crystal structure of the molecule is stabilized by intermolecular C—H…S and C—H…π interactions.

Structural and physico-chemical characterization of a dirhamnolipid biosurfactant purified from Pseudomonas aeruginosa: application of crude biosurfactant in enhanced oil recovery

RSC Advances ◽  
2016 ◽  
Vol 6 (74) ◽  
pp. 70669-70681 ◽  
Author(s):  
Debananda Gogoi ◽  
Pabitra Bhagowati ◽  
Pronob Gogoi ◽  
Naba K. Bordoloi ◽  
Abu Rafay ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Structural Characterization ◽  
Contaminated Soil ◽  
Chemical Characterization ◽  
Biotechnological Application ◽  
Physico Chemical ◽  
Petroleum Oil

The present study describes the structural characterization and biotechnological application of a dirhamnolipid biosurfactant produced byPseudomonas aeruginosastrain NBTU-01 isolated from a petroleum oil-contaminated soil sample.

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