scholarly journals Synthesis, characterisation and reactions of cationic complexes of Arylantimony (III) chlorides ArnSbCl3-n with perchlorate and tetrafluoroborate anions

2013 ◽  
Vol 1 (2) ◽  
pp. 42-48
Author(s):  
Ram Nath Prasad Yadav
Keyword(s):  
Molecular Weight ◽  
Solid State ◽  
General Formula ◽  
1H Nmr ◽  
Elemental Analysis ◽  
Chemical Data ◽  
Physico Chemical ◽  
Hexamethyl Phosphoramide

Several hitherto unreported cationic complexes of the general formula [Ar2SbL][Y] and [ArSbL2][Y]2 [ Where, Ar  =  C6H5, L =  α-Picoline, Pyridine, Ph3AsO, hexamethyl phosphoramide (HMPA), thiourea (TU) and Y = ClO4− BF4− ] have been synthesized and characterized by solid state IR, 1H NMR, elemental analysis, conductance and molecular weight measurements. The physico-chemical data, cations [Ar2SbL]+1 and[ArSbL2]+2  are assigned a pyramidal structure.DOI: http://dx.doi.org/10.3126/ijasbt.v1i2.8204 Int J Appl Sci Biotechnol, Vol. 1(2): 42-49

scholarly journals Preparation and Characterisation of complex Bis(pentafluorophenyl) antimony(V) anions of the type [(Rf)2SbCl3X]-

2013 ◽  
Vol 1 (3) ◽  
pp. 90-96 ◽  
Author(s):  
Ram Nath Prasad Yadav
Keyword(s):  
Solid State ◽  
Spectral Data ◽  
General Formula ◽  
1H Nmr ◽  
Elemental Analysis ◽  
19F Nmr ◽  
Chemical Data ◽  
Molecular Weights ◽  
Counter Ions ◽  
Physico Chemical

A series of hiteherto unreported solid salts of hexa-coordinated anions of the general formula [(Rf)2SbCl3X]- , where Rf = C6F5 ; L = Cl and X = Cl, Br, I, N3, NCS and SeCN have been prepared in the presence of tetraorgano ammonium, phosphonium, arsonium and stibonium counter ions. The complexes have been formulated and characterised on the basis of elemental analysis, molar conductances, molecular weights and solid state IR, solution state 1H NMR and 19F NMR spectral data. The physico-chemical data are consistent with six-coordinate antimony complexes.DOI: http://dx.doi.org/10.3126/ijasbt.v1i3.8304 Int J Appl Sci Biotechnol, Vol. 1(3) 2013 : 90-96

scholarly journals Co(II) Complex of Quercetin–Spectral, Anti-/Pro-Oxidant and Cytotoxic Activity in HaCaT Cell Lines

2021 ◽  
Vol 11 (19) ◽  
pp. 9244
Author(s):  
Monika Kalinowska ◽  
Hanna Lewandowska ◽  
Marek Pruszyński ◽  
Grzegorz Świderski ◽  
Ewelina Gołębiewska ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Solid State ◽  
Cytotoxic Activity ◽  
General Formula ◽  
Cell Lines ◽  
Elemental Analysis ◽  
Hacat Cell ◽  
Water Solution ◽  
Ft Ir ◽  
Hacat Cell Lines

In this study a cobalt(II) complex of quercetin was synthetized in the solid state with the general formula Co(C15H9O7)2∙2H2O. The FT-IR, elemental analysis, and UV/Vis methods were used to study the composition of the complex in a solid state and in a water solution. The anti-/pro-oxidant activity of quercetin and the Co(II) complex was studied by means of spectrophotometric DPPH (2,2-diphenyl-1-picrylhydrazyl), FRAP (ferric reducing antioxidant activity) and Trolox oxidation assays. The cytotoxicity of quercetin and Co(II)-quercetin complex in HaCat cell lines was then established.

Combination of solid-state NMR and 1H NMR relaxometry for the study of intercalated saponite clays with the macrocyclic derivatives of Gd(iii) and Y(iii)

2020 ◽  
Vol 49 (20) ◽  
pp. 6566-6571 ◽  
Author(s):  
Daniela Lalli ◽  
Stefano Marchesi ◽  
Fabio Carniato ◽  
Chiara Bisio ◽  
Lorenzo Tei ◽  
...  
Keyword(s):  
Solid State ◽  
1H Nmr ◽  
Solid State Nmr ◽  
Chemical Properties ◽  
H Nmr ◽  
Nmr Relaxometry ◽  
Physico Chemical ◽  
Derivatives Of ◽  
1H Nmr Relaxometry ◽  
Synthetic Saponite

A combination of solid-state NMR and 1H-NMR relaxometric investigations has been employed to characterize the structure and physico-chemical properties of a novel synthetic saponite intercalated with Gd(iii) and Y(iii) chelates.

Study of Synthesis of Novel ɤ-Valerolactone-Based Polyurethanes

2012 ◽  
Vol 229-231 ◽  
pp. 297-302 ◽  
Author(s):  
Mochamad Chalid ◽  
Hans J. Heeres ◽  
Antonius A. Broekhuis
Keyword(s):  
Molecular Weight ◽  
1H Nmr ◽  
Elemental Analysis ◽  
13C Nmr ◽  
Experimental Work ◽  
Ring Opening ◽  
Molecular Engineering ◽  
Amine Compounds

The ring opening of -valerolactone (GVL) with amine compounds was reported as a promising molecular engineering tool to synthesize precursors for new bio-based polymers such as polyurethanes (PUs). Experimental work on the synthesis of polymers based on GVL/1,2-ethanolamine and GVL/1,2-diaminoethane adducts, and di-isocyanates (1,4-phenylene-di-isocyanate (PDI) 2,4-toluene-di-isocyanate (TDI) and hexamethylene-di-isocyanate (HDI)) is described. The polymers were characterized by FTIR, 1H-NMR, 13C-NMR, elemental analysis and GPC. The best polymerization results were obtained using TEA as the catalyst, DMA as the solvent and a temperature of 140°C for the reaction of the GVL/1,2-aminoethanol adduct with TDI. A polymer with a molecular weight (Mw) of 156 KDalton was produced in 97% yield.

Synthesis, Characterization, and Crystal Structures of Three cis/trans Pyridine - Cyclopalladated Ferrocenylimine Complexes, and Their Catalysis in Suzuki Reactions

2007 ◽  
Vol 60 (3) ◽  
pp. 190 ◽  
Author(s):  
Chen Xu ◽  
Jun-Fang Gong ◽  
Yan-Hui Zhang ◽  
Yu Zhu ◽  
Yang-Jie Wu
Keyword(s):  
Solid State ◽  
Ir Spectra ◽  
Single Crystal ◽  
1H Nmr ◽  
Elemental Analysis ◽  
Phenylboronic Acid ◽  
Suzuki Reaction ◽  
X Ray ◽  
Suzuki Reactions ◽  
Aryl Bromides

Three new pyridine–cyclopalladated ferrocenylimine complexes 2a–c have been easily prepared and characterized by elemental analysis, ESI-MS, 1H NMR, and IR spectra. Their detailed structures are determined by single-crystal X-ray analysis. Palladacycle 2a is found to be a cis complex in the solid state, while 2b and 2c are trans complexes. These complexes were found to be efficient for the Suzuki reaction of aryl bromides with phenylboronic acid. Typically, using 0.2 mol% of 2c in the presence of 1.5 equivalents of K2CO3 as base in toluene at 100°C provided the coupled products in good to excellent yields.

scholarly journals Physico-chemical and structural characterization of mucilage isolated from seeds of Diospyros melonoxylon Roxb.

2014 ◽  
Vol 50 (4) ◽  
pp. 713-725 ◽  
Author(s):  
Sudarshan Singh ◽  
Sunil B. Bothara
Keyword(s):  
Molecular Weight ◽  
Particle Size ◽  
Elemental Analysis ◽  
Gel Permeation Chromatography ◽  
Particle Analysis ◽  
Scanning Calorimetry ◽  
Thermogravimetry Analysis ◽  
Good Thermal Stability ◽  
Physico Chemical ◽  
Gel Permeation

Mucilage was isolated from the seeds of Diospyros melonoxylonRoxb., a plant growing naturally in the forests of India. Various physico-chemical methods like particle analysis, scanning electron microscopy, differential scanning calorimetry, differential thermal analysis, thermogravimetry analysis, molecular weight by gel permeation chromatography, rheometry, elemental analysis, x-ray diffraction spectrometry, zeta potential, fourier transform infrared spectroscopy, 1D(1H and 13C) (NMR) have been employed to characterize this gum in the present study. Particle analyses suggest that mucilage had particle size in nanometer. SEM analysis suggested that the mucilage had irregular particle size. The glass transition temperature of the gum observed was 78 °C and 74 °C by DSC and DTA respectively. The Thermogravimetry analysis suggested that mucilage had good thermal stability with two stage decomposition. The molecular weight of mucilage was determined to be 8760, by gel permeation chromatography, while the viscosity of mucilage was observed to be 219.1 cP. The XRD pattern of the mucilage indicated a complete amorphous nature. Elemental analysis of the gum revealed specific contents of carbon, hydrogen, nitrogen and sulfur. The major functional groups identified from FT-IR spectrum include 3441 cm-1 (-OH), 1632 cm-1 (-COO-), 1414 cm-1 (-COO-) and 1219 cm-1 (-CH3CO). Analysis of mucilage by paper chromatography and 1D NMR indicated the presence of sugars.

Synthesis and Characterisation of Bis(η5-methylcyclopentadienyl) N-Aryl-dithiocarbamato Chloro Titanium(IV) Compounds

1979 ◽  
Vol 34 (7) ◽  
pp. 949-951 ◽  
Author(s):  
N. K. Kaushik ◽  
B. Bhushan ◽  
G. R. Chhatwal
Keyword(s):  
Molecular Weight ◽  
Magnetic Susceptibility ◽  
General Formula ◽  
Elemental Analysis ◽  
Electronic Spectra ◽  
Probable Structure ◽  
Ammonium N

Abstract Some bis(η5-methylcyclopentadienyl) N-aryl-dithiocarbamato chloro titanium(IV) compounds of the general formula η5-(Mecp)2Ti(S2CNRH)Cl (R = phenyl; o-, m- and p-tolyl; p-methoxy phenyl; o- and p-ethoxy phenyl; o-, m- and p-chlorophenyl; p-bromophenyl and p-iodophenyl groups) have been prepared by the reaction of bis(η5-methylcyclopentadienyl) titanium(IV) dichloride with ammonium N-aryl-dithiocarbamates. A study of the molecular weight, conductance, infrared and electronic spectra, and magnetic susceptibility in addition to elemental analysis has been carried out to throw some light on the probable structure of these derivatives

Synthesis, characterization, and biological activities of some transition metal(II) complexes with the thiosemicarbazone derived from 4-[1-(4-methylphenylsulfonyl)-1H-indol-3-yl]but-3-en-2-one

2006 ◽  
Vol 60 (3) ◽  
Author(s):  
J. Qu ◽  
G. Sun ◽  
L. Wang ◽  
L. Qu
Keyword(s):  
Biological Activity ◽  
Transition Metal ◽  
General Formula ◽  
1H Nmr ◽  
Elemental Analysis ◽  
Nmr Spectra ◽  
Biological Activities ◽  
Antitumour Activity ◽  
Molar Conductivity

AbstractA new 4-[1-(4-methylphenylsulfonyl)-1H-indol-3-yl]but-3-en-2-one thiosemicarbazone (HL) was synthesized derived from 4-[1-(4-methylphenylsulfonyl)-1H-indol-3-yl]but-3-en-2-one. Four transition metal(II) complexes of HL have been prepared. Elemental analysis, molar conductivity, IR, UV, 1H NMR spectra, and TG-DTA have been used to characterize these complexes. The complexes have the general formula ML2, where M = Zn, Cu, Co, and Ni. The ligand and its complexes have been studied for their possible biological activity including anti-inflammatory, antibacterial, and antitumour activity in vitro.

Synthesis, characterization, and anti-tumor activities of some transition metal(II) complexes with podophyllic acid hydrazide

2009 ◽  
Vol 63 (4) ◽  
Author(s):  
Jian-Qiang Qu ◽  
Ling Qu ◽  
Qiu-Hua Yang ◽  
Liu-Fang Wang
Keyword(s):  
Thermal Analysis ◽  
Transition Metal ◽  
Tumor Cells ◽  
General Formula ◽  
1H Nmr ◽  
Elemental Analysis ◽  
Acid Hydrazide ◽  
Complexometric Titration ◽  
Anti Tumor Activity

AbstractFour transition metal(II) complexes with podophyllic acid hydrazide (HL) were prepared and characterized by elemental analysis, complexometric titration, thermal analysis, conductivity, IR, and 1H NMR. The complexes have the general formula ML2 · nH2O, where M = Zn, Cu, Co, and Ni, n = 2 or 0. Anti-tumor activities of podophyllotoxin, HL, ZnL2 · 2H2O, and NiL2 were tested by both the MTT and the SRB method. The results show that the activities of the complexes against the tumor cells tested are superior to HL and the anti-tumor activity of NiL2 is even similar to that of podophyllotoxin.

Sign in / Sign up

Export Citation Format

Share Document