Organic compounds of gallium. III. Reactions of gallium alkoxides with acetylacetone, ethyl acetoacetate, methyl acetoacetate, and methyl salicylate

1969 ◽  
Vol 47 (14) ◽  
pp. 2661-2663 ◽  
Author(s):  
R. C. Mehrotra ◽  
S. R. Bindal
Keyword(s):  
Organic Compounds ◽  
Organic Solvents ◽  
Infrared Spectra ◽  
Ethyl Acetoacetate ◽  
Methyl Salicylate ◽  
Methyl Acetoacetate ◽  
Reduced Pressure ◽  
Molecular Weights ◽  
Molar Ratios ◽  
Derivatives Of

Derivatives of gallium of the type: Ga(i-C3H7O)3−xligx (x = 1, 2, or 3; and H lig = acetylacetone, methyl and ethyl acetoacetate, or methyl salicylate) have been synthesized by reacting gallium alkoxides with ligands in various molar ratios. The compounds are soluble in organic solvents and could be volatilized under reduced pressure. Their molecular weights have been determined ebullioscopically. The infrared spectra of some of the compounds have been studied.

Organobismuth compounds. I. Studies on triphenylbismuth(V) derivatives, Ph3BiX2

1970 ◽  
Vol 48 (16) ◽  
pp. 2488-2493 ◽  
Author(s):  
R. G. Goel ◽  
H. S. Prasad
Keyword(s):  
Molecular Weight ◽  
Infrared Spectra ◽  
Molecular Species ◽  
Structural Features ◽  
Molecular Weights ◽  
Electrical Conductances ◽  
Conductance Data ◽  
Chemical Constitution ◽  
Derivatives Of ◽  
Coordinate Structures

Triphenylbismuth(V) acid derivatives of the type, Ph3BiX2, where X = halide, nitrate, cyanate, acetate, haloacetate, or cyanoacetate have been prepared. Infrared spectra (4000 to 200 cm−1 region), electrical conductances, and molecular weights of these compounds have been studied to elucidate their structural features and chemical constitution. The molecular weight and conductance data show that these compounds behave as molecular species in benzene or nitromethane. The infrared spectroscopic results also indicate non-ionic five-coordinate structures. Bi—X stretching frequencies have been assigned for the difluoride, dichloride, dinitrate, dicyanate, and diacetate. These frequencies occur in the region 410–240 cm−1.

Coordination compounds of substituted 1,10-Phenanthrolines and related dipyridyls. VIII. Complexes of silver and 2,9-Dimethyl-1,10-phenanthroline

1965 ◽  
Vol 18 (9) ◽  
pp. 1345 ◽  
Author(s):  
JR Hall ◽  
RA Plowman ◽  
HS Preston
Keyword(s):  
Aqueous Solutions ◽  
Organic Solvents ◽  
Infrared Spectra ◽  
Coordination Compounds ◽  
Molecular Weights ◽  
Low Solubility ◽  
Covalently Bound

Addition of 2,9-dimethyl-1,10-phenanthroline (dmp) in organic solvents to aqueous solutions of silver(1) salts yielded mono complexes represented by AgXdmp, where X = NO3, Cl, Br, I; 2X = SO4, and bis complexes Ag(dmp),Y, where Y = NO3, Cl04. Water of crystallization was present only in the sulphate. The mono complexes were empirically three-coordinate. Low solubility prevented the determination of molecular weights. Infrared spectra indicated that the polyatomic anions were covalently bound. The 1 : 1 electrolyte [Ag(dmp)(py)]ClO4 subsequently prepared seemed to be an example of three-coordination. The bis complexes were 1 : 1 electrolytes in nitrobenzene and were most likely tetrahedral.

Organic Compounds of Uranium (V)

1970 ◽  
Vol 25 (5) ◽  
pp. 476-479 ◽  
Author(s):  
S. Dubey ◽  
S. N. Misra ◽  
R. N. Kapoor
Keyword(s):  
Molecular Weight ◽  
Organic Compounds ◽  
Methyl Acetoacetate ◽  
Tertiary Butanol ◽  
Derivatives Of

The reactions of Uranium pentaethoxide with 1,3 dicarbonyl ligands (dibenzoyl methane, ethyl 1-methyl acetoacetate, 5,5 dimethyl 1,3 cyclohexane dione (dimedone) have been studied under anhydrous conditions and the derivatives of the type U(OEt)5-x(lig)x (where x= 1, 2 or 3) have been isolated. These derivatives interchange their ethoxy groups with tertiary butoxy groups when treated with tertiary butanol. Determination of molecular weight of soluble derivatives suggest them to be monomeric in boiling benzene.

Organic compounds of uranium. Reactions of uranium pentaethoxide with β-diketones

1967 ◽  
Vol 20 (2) ◽  
pp. 233 ◽  
Author(s):  
AM Bhandari ◽  
RN Kapoor
Keyword(s):  
Organic Compounds ◽  
Butyl Alcohol ◽  
Molecular Weights ◽  
Boiling Points ◽  
Derivatives Of

The reactions of uranium pentaethoxide with β-diketones (acetylacetone and benzoylacetone) have been studied and derivatives of the type U(OEt)5-xLx (where L = acetylacetone or benzoylacetone; x = 1, 2, or 3) have been isolated. These derivatives interchange their ethoxy groups with tertiary butoxy groups on refluxing with t-butyl alcohol. The molecular weights and boiling points of some of the typical derivatives have been determined and recorded.

ORGANIC COMPOUNDS OF SAMARIUM: II. REACTIONS OF SAMARIUM ISOPROPOXIDE WITH ETHYL ACETOACETATE

1966 ◽  
Vol 44 (12) ◽  
pp. 1369-1372 ◽  
Author(s):  
B. S. Sankhla ◽  
R. N. Kapoor
Keyword(s):  
Molecular Weight ◽  
Organic Compounds ◽  
Ethyl Acetoacetate ◽  
Butyl Alcohol ◽  
Acetoacetic Ester ◽  
Reduced Pressure ◽  
Endothermic Reactions ◽  
Higher Temperature ◽  
Ester Lead ◽  
Interchange Reactions

The reactions of samarium isopropoxide with ethyl acetoacetate have been carried out in benzene medium in different stoichiometric ratios and the compounds of the type Sm(OPri)2 (Etacac), Sm(OPri)(Etacac)2, and Sm(Etacac)3 have been isolated in quantitative yields. However, the reaction of samarium isopropoxide with excess of the acetoacetic ester lead to the formation of Sm(Etacac)3.Etacac, which on heating under reduced pressure at 110 °C for [Formula: see text] loses its addition molecule of ester. The reactions are exothermic and the amount of heat liberated also increases with the increase in the concentration of the ester.The interchange reactions of the products Sm(OPri)2(Etacac) and Sm(OPri)(Etacac)2 with t-butyl alcohol have also been carried out; they are endothermic reactions. The compounds Sm(OBut)2(Etacac) and Sm(OBut)(Etacac)2 have been obtained in quantitative yields from the reaction mixture. All the products are stable up to 200 °C at 0.5 mm, but at higher temperature they decompose to deep-red solids. Molecular weight determinations show that they are dimeric in nature.

scholarly journals Complexes of end-functionalized polystyrenes carrying amine end-group with transition metals: association effects in organic solvents

2019 ◽  
Vol 10 (1) ◽  
pp. 4764-4773
Keyword(s):  
Light Scattering ◽  
Organic Solvents ◽  
Capillary Tube ◽  
High Vacuum ◽  
Molar Ratio ◽  
Complex Situation ◽  
Molecular Weights ◽  
Molar Ratios ◽  
Association Behavior ◽  
End Group

Linear end-functionalized polystyrenes of different molecular weights bearing amino end-group (NPS) were synthesized by anionic polymerization high vacuum techniques. The polymers were exposed to copper and iron salts (CuCl2.2H2O and FeCl3.6H2O) to form complexes with specific metal/amino molar ratios. The thermal stability of these complexes was studied by Thermogravimetric Analysis (TGA) and Differential Thermogravimetry (DTG), whereas their solution behavior was studied by Low Angle Laser Light Scattering (LALLS), Dynamic Light Scattering (DLS) and dilute solution Viscometry. Extended aggregation phenomena of these complexes were observed in organic solvents. The association behavior was influenced by the molecular weight of the polymer chain, the metal/amine group molar ratio, the chemical nature of the metal and the polarity of the solvent. A complex situation was revealed by DLS showing the existence of equilibrium between aggregates and clusters. Under the influence of shear forces applied in the capillary tube of the viscometer the clusters are disrupted.

Aluminium (III) Derivatives of Schiff bases Derived from o-Hydroxyacetophenone and Hydroxyalkylamines

1973 ◽  
Vol 28 (1-2) ◽  
pp. 63-68 ◽  
Author(s):  
J. P. Tandon ◽  
R. N. Prasad
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
Infrared Spectra ◽  
Aluminium Isopropoxide ◽  
Molecular Weights ◽  
Schiff Base Derivatives ◽  
Derivatives Of

The 1 : 1 and 2 : 3 interactions of aluminium isopropoxide with bifunctional tridentate Schiff bases, derived by the condensation of o-hydroxyacetophenone with hydroxyalkylamines [such as 2-hydroxyethylamine, 2-hydroxy-1-propylamine, 1-hydroxy-2-methyl-2-propylamine and 1-hydroxy-2-butylamine] have been investigated. The resulting derivatives of the types, Al(OPrt)(SB) and Al2(SB)3 (where SB2- is the anion of the corresponding Schiff base, SBH2) have been isolated in almost quantitative yields. The ebullioscopic determination of molecular weights in benzene has shown the isopropoxy derivatives to be dimers, whereas the dialuminium-tris-Schiff base derivatives to be monomers. The infrared spectra of these compounds have been recorded and plausible structures indicated.

SYNTHESIS OF HYDROGEN IN ACOUSTOPLASMA DISCHARGE IN A LIQUID-PHASE STREAM

2019 ◽  
pp. 42-48 ◽  
Author(s):  
N. A. Bulychev
Keyword(s):  
Liquid Phase ◽  
Organic Compounds ◽  
Electrode Materials ◽  
Solid Phase ◽  
Plasma Discharge ◽  
Raw Material ◽  
Two Phase ◽  
Reduced Pressure ◽  
External Power Source ◽  
Phase Medium

In this paper, the plasma discharge in a high-pressure fluid stream in order to produce gaseous hydrogen was studied. Methods and equipment have been developed for the excitation of a plasma discharge in a stream of liquid medium. The fluid flow under excessive pressure is directed to a hydrodynamic emitter located at the reactor inlet where a supersonic two-phase vapor-liquid flow under reduced pressure is formed in the liquid due to the pressure drop and decrease in the flow enthalpy. Electrodes are located in the reactor where an electric field is created using an external power source (the strength of the field exceeds the breakdown threshold of this two-phase medium) leading to theinitiation of a low-temperature glow quasi-stationary plasma discharge.A theoretical estimation of the parameters of this type of discharge has been carried out. It is shown that the lowtemperature plasma initiated under the flow conditions of a liquid-phase medium in the discharge gap between the electrodes can effectively decompose the hydrogen-containing molecules of organic compounds in a liquid with the formation of gaseous products where the content of hydrogen is more than 90%. In the process simulation, theoretical calculations of the voltage and discharge current were also made which are in good agreement with the experimental data. The reaction unit used in the experiments was of a volume of 50 ml and reaction capacity appeared to be about 1.5 liters of hydrogen per minute when using a mixture of oxygen-containing organic compounds as a raw material. During their decomposition in plasma, solid-phase products are also formed in insignificant amounts: carbon nanoparticles and oxide nanoparticles of discharge electrode materials.

scholarly journals Heatwave frequency and seedling death alter stress-specific emissions of volatile organic compounds in Aleppo pine

Oecologia ◽  
2021 ◽  
Author(s):  
Benjamin Birami ◽  
Ines Bamberger ◽  
Andrea Ghirardo ◽  
Rüdiger Grote ◽  
Almut Arneth ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Gas Exchange ◽  
Organic Compounds ◽  
Stress Responses ◽  
Methyl Salicylate ◽  
Environmental Changes ◽  
Pinus Halepensis ◽  
Dark Respiration ◽  
Seedling Mortality ◽  
Volatile Organic

AbstractBiogenic volatile organic compounds (BVOC) play important roles in plant stress responses and can serve as stress indicators. While the impacts of gradual environmental changes on BVOCs have been studied extensively, insights in emission responses to repeated stress and recovery are widely absent. Therefore, we studied the dynamics of shoot gas exchange and BVOC emissions in Pinus halepensis seedlings during an induced moderate drought, two four-day-long heatwaves, and the combination of drought and heatwaves. We found clear stress-specific responses of BVOC emissions. Reductions in acetone emissions with declining soil water content and transpiration stood out as a clear drought indicator. All other measured BVOC emissions responded exponentially to rising temperatures during heat stress (maximum of 43 °C), but monoterpenes and methyl salicylate showed a reduced temperature sensitivity during the second heatwave. We found that these decreases in monoterpene emissions between heatwaves were not reflected by similar declines in their internal storage pools. Because stress intensity was extremely severe, most of the seedlings in the heat-drought treatment died at the end of the second heatwave (dark respiration ceased). Interestingly, BVOC emissions (methanol, monoterpenes, methyl salicylate, and acetaldehyde) differed between dying and surviving seedlings, already well before indications of a reduced vitality became visible in gas exchange dynamics. In summary, we could clearly show that the dynamics of BVOC emissions are sensitive to stress type, stress frequency, and stress severity. Moreover, we found indications that stress-induced seedling mortality was preceded by altered methanol, monoterpene, and acetaldehyde emission dynamics.

scholarly journals Mo@GAA-Fe3O4 MNPs: a highly efficient and environmentally friendly heterogeneous magnetic nanocatalyst for the synthesis of polyhydroquinoline derivatives

RSC Advances ◽  
2021 ◽  
Vol 11 (18) ◽  
pp. 10497-10511
Author(s):  
Mehraneh Aghaei-Hashjin ◽  
Asieh Yahyazadeh ◽  
Esmayeel Abbaspour-Gilandeh
Keyword(s):  
Ethyl Acetoacetate ◽  
Ammonium Acetate ◽  
Environmentally Friendly ◽  
Magnetic Nanocatalyst ◽  
Methyl Acetoacetate ◽  
Highly Efficient ◽  
Fe3o4 Mnps

Polyhydroquinolines were obtained from a sequential four-component reaction between dimedone or 1,3-cyclohexandione, ethyl acetoacetate, or methyl acetoacetate as a β-ketoester, aldehydes, and ammonium acetate, with Mo@GAA-Fe3O4 MNPs as a green nanocatalyst.

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