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.

scholarly journals SYNTHESIS AND CHARACTERIZATION OF TRIAQUATRISULFISOKSAZOL COBALT(II)SULPHATE.nHYDRATE COMPLEX

2010 ◽  
Vol 6 (3) ◽  
pp. 275-279
Author(s):  
Sentot Budi Rahardjo ◽  
Abu Masykur ◽  
Melin Puspitaningrum
Keyword(s):  
Thermal Analysis ◽  
Magnetic Susceptibility ◽  
Electric Conductivity ◽  
Synthesis And Characterization ◽  
Cyclic Voltammograms ◽  
Infra Red

Complex of cobalt(II) with sulfisoxazole (slfs) has been synthesized in 1 : 4 mole ratio of metal to ligands in methanol, the complex formula is [Co(slfs)3(H2O)3]SO4.nH2O. The electric conductivity of the complex in methanol correspond to 1:1 electrolyte. The thermal analysis indicates that complex contain some hydrates. Magnetic Susceptibility measurements show that the complex is paramagnetic with µeff = 4,60(9) BM. Infra red spectra indicates that the primary N-H group coordinated to the center ion, it is signed by a shift of primary N-H group absorption. UV-Vis spectrum appears one peak at λ= 515,5 nm (19.342 cm-1) due to transition peak of 4T1g (F) → 4T2g (P) (ν3) overlay to transition peak of 4T1g(F) → 4A2g(F) (ν2). The value of 10 Dq (Δo) that corresponds to transition 4T1g → 4T2g (n1) is 95,29 kJ.mol-1. Cyclic voltammograms have revealed quasi reversible. The complex probably is octahedral.   Keywords: cobalt(II), sulfisoxazole, complex, paramagnetic, octahedral

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 and characterization of some alkoxide derivatives of nickel(II)

1980 ◽  
Vol 33 (1) ◽  
pp. 37 ◽  
Author(s):  
BP Baranwal ◽  
RC Mehrotra
Keyword(s):  
Magnetic Susceptibility ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Synthesis And Characterization ◽  
Element Analysis ◽  
Molar Ratios ◽  
Spin Resonance ◽  
Derivatives Of ◽  
Interchange Reactions

A number of alkoxides and chloride alkoxides of nickel(II) of the types Ni(OR)2, Ni(OR)Cl and Ni(OR)Cl,ROH have been synthesized from the reactions of anhydrous nickel(II) chloride with lithium or sodium alkoxides in appropriate molar ratios. These derivatives have been characterized by element analysis, infrared, electronic reflectance and electron spin resonance spectra in addition to magnetic susceptibility measurements. Alcohol interchange reactions in these alkoxide derivatives have been studied in detail.

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 Synthesis and characterization of different soybean oil-based polyols with fatty alcohol and aromatic alcohol

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 491-499
Author(s):  
Fukai Yang ◽  
Hao Yu ◽  
Yuyuan Deng ◽  
Xinyu Xu
Keyword(s):  
Molecular Weight ◽  
Soybean Oil ◽  
Retention Time ◽  
Ring Opening ◽  
Isoamyl Alcohol ◽  
Synthesis And Characterization ◽  
Intermolecular Force ◽  
H Nmr ◽  
Epoxy Groups

Abstract In this article, five kinds of soybean oil-based polyols (polyol-E, polyol-P, polyol-I, polyol-B, and polyol-M) were prepared by ring-opening the epoxy groups in epoxidized soybean oil (ESO) with ethyl alcohol, 1-pentanol, isoamyl alcohol, p-tert-butylphenol, and 4-methoxyphenol in the presence of tetrafluoroboric acid as the catalyst. The SOPs were characterized by FTIR, 1H NMR, GPC, viscosity, and hydroxyl numbers. Compared with ESO, the retention time of SOPs is shortened, indicating that the molecular weight of SOPs is increased. The structure of different monomers can significantly affect the hydroxyl numbers of SOPs. Due to the large steric hindrance of isoamyl alcohol, p-hydroxyanisole, and p-tert-butylphenol, SOPs prepared by these three monomers often undergo further dehydration to ether reactions, which consumes the hydroxyl of polyols, thus forming dimers and multimers; therefore, the hydroxyl numbers are much lower than polyol-E and polyol-P. The viscosity of polyol-E and polyol-P is much lower than that of polyol-I, polyol-B, and polyol-M. A longer distance between the molecules and the smaller intermolecular force makes the SOPs dehydrate to ether again. This generates dimer or polymers and makes the viscosity of these SOPs larger, and the molecular weight greatly increases.

Synthesis and characterization of layered bismuth vanadates

1990 ◽  
Vol 5 (11) ◽  
pp. 2718-2722 ◽  
Author(s):  
K. B. R. Varma ◽  
G. N. Subbanna ◽  
T. N. Guru ◽  
C. N. R. Rao
Keyword(s):  
Curie Temperature ◽  
General Formula ◽  
Layered Structure ◽  
Synthesis And Characterization ◽  
Structure And Properties ◽  
Bismuth Vanadates

Bi2VO5.5 (Bi4O11), which is the vanadium analog of the first member of the Aurivillius family of oxides of the general formula Bi2An−1BnO3n+3, has been prepared and characterized. The vanadate has the expected layered structure and is ferroelectric with a Curie temperature of 720 K. While we have not been able to synthesize the vanadium analog of the n = 2 member of the Aurivillius family, we have examined the structure and properties of a vanadate of the composition Bi2V3O9.

Synthesis and Characterization of Poly(Aryl Ether Quinoxaline)s with Controlled Molecular Weight

2011 ◽  
Vol 391-392 ◽  
pp. 826-829
Author(s):  
Song Ya Zhang ◽  
Zhong Xiao Li ◽  
Jia Ling Pu
Keyword(s):  
Molecular Weight ◽  
Glass Transition ◽  
Strong Acid ◽  
Decomposition Temperature ◽  
Molar Ratio ◽  
Synthesis And Characterization ◽  
Aryl Ether ◽  
Good Solubility ◽  
Step Procedure

Novel poly(aryl ether quinoxaline)s (PEQs) were prepared via a two-step procedure. First, poly (ether benzil) (PEB) was synthesized by the polycondensation of 4,4’-difluorobenzil and 4,4’-isopropylidenediphenol.Then, PEB was reacted with 1,2-diaminobenzene and 4,4'-oxydibenzene-1,2-diamine to give the PEQs. The molecular weight of the PEQs could be adjusted easily by varying the molar ratio of 1,2-diaminobenzene to 4,4'-oxydibenzene-1,2-diamine. The PEQs exhibited good solubility in common organic solvents such as NMP, DMAc, DMF, cyclohexanone and chloroform. In addition, the PEQs also had high glass transition (Tg) temperatures and good thermal properties, with an initial thermal decomposition temperature above 475 oC and glass transition temperatures above 210 oC. They also exhibited excellent resistance to strong acid and alkali.

scholarly journals Arene Ruthenium Metalla-Assemblies with Anthracene Moieties for PDT Applications

Inorganics ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 97 ◽  
Author(s):  
Marie Gaschard ◽  
Farzaneh Nehzat ◽  
Thomas Cheminel ◽  
Bruno Therrien
Keyword(s):  
Molecular Structure ◽  
Single Crystal ◽  
General Formula ◽  
Structure Analysis ◽  
White Light ◽  
Light Irradiation ◽  
Synthesis And Characterization ◽  
X Ray

The synthesis and characterization of three metalla-rectangles of the general formula [Ru4(η6-p-cymene)4(μ4-clip)2(μ2-Lanthr)2][CF3SO3]4 (Lanthr: 9,10-bis(3,3’-ethynylpyridyl) anthracene; clip = oxa: oxalato; dobq: 2,5-dioxido-1,4-benzoquinonato; donq: 5,8-dioxido-1,4-naphthoquinonato) are presented. The molecular structure of the metalla-rectangle [Ru4(η6-p-cymene)4(μ4-oxa)2(μ2-Lanthr)2]4+ has been confirmed by the single-crystal X-ray structure analysis of [Ru4(η6-p-cymene)4(μ4-oxa)2(μ2-Lanthr)2][CF3SO3]4 · 4 acetone (A2 · 4 acetone), thus showing the anthracene moieties to be available for reaction with oxygen. While the formation of the endoperoxide form of Lanthr was observed in solution upon white light irradiation, the same reaction does not occur when Lanthr is part of the metalla-assemblies.

scholarly journals Synthesis and Thermal Properties of Cerium-Dysprosium Oxide

2016 ◽  
Vol 61 (2) ◽  
pp. 965-969 ◽  
Author(s):  
M. Mikuśkiewicz ◽  
M. Stopyra ◽  
G. Moskal
Keyword(s):  
Thermal Properties ◽  
Phase Composition ◽  
Thermal Diffusivity ◽  
Solid State ◽  
Cerium Oxide ◽  
Solid State Reaction ◽  
Synthesis And Characterization ◽  
Equimolar Ratio ◽  
Dysprosium Oxide

Abstract The paper presents results of investigation on synthesis and characterization of cerium-dysprosium oxide. The input powders - dysprosium oxide Dy2O3 and cerium oxide CeO2 - were mixed so as to obtain equimolar ratio of cations, milled in alcohol and synthesized via solid state reaction process at 1350°C under 15MPa in vacuum for 2h. The microstructure, phase composition and thermal properties were analyzed. The obtained material was multiphase. Non-stoichiometric compounds were identified. Thermal diffusivity of investigated material decreased in the temperature range of 25-1000°C from 0,71 to 0,45 mm2/s.

scholarly journals Synthesis and characterization of new complexes of Co+2 , Ni+2 , Cu+2 and Zn+2 with (Sodium acetate thio ) ethylene ligands

2013 ◽  
Vol 10 (3) ◽  
pp. 650-657
Author(s):  
Baghdad Science Journal
Keyword(s):  
Content Analysis ◽  
General Formula ◽  
Metal Content ◽  
Sodium Acetate ◽  
Magnetic Measurement ◽  
Synthesis And Characterization ◽  
Square Planar ◽  
Square Planar Complexes ◽  
Uv Visible

This research involves the preparation of new ligands 1,1,2,2- tetrakis (sodium acetate thio)ethylene(L1) and 1,1,2- tris(sodiumacetatethio) ethylene(L2), through the reaction of disodium thioglycolate) with tetra chloro ethylene or tri chloro ethylene in (1:4) or (1:3) moler ratio . Homodinucliar complexes of general formlu [M2(L1)] and [M2(L2)ClH2O] , when M= Co(II), Ni(II), Cu (II) and Zn(II) also mono nuclear complexes of general formula [M(L2)] . The prepared complexes were characterized using spectral method (UV/Visible/ IR) , metal content analysis , magnetic and atomic measurements . The spectral and magnetic measurement indicats that some complexes have tetrahedral or square planar complexes environtment .

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