Selective Monoacylation of Diols and Asymmetric Desymmetrization of Dialkyl meso-Tartrates Using 2-Pyridyl Esters as Acylating Agents and Metal Carboxylates as Catalysts

2019 ◽  
Vol 84 (14) ◽  
pp. 9313-9321 ◽  
Author(s):  
Yuki Hashimoto ◽  
Chiaki Michimuko ◽  
Koki Yamaguchi ◽  
Makoto Nakajima ◽  
Masaharu Sugiura
Keyword(s):  
Metal Carboxylates

Layered transition metal carboxylates: synthesis, structural aspects and observation of multi-step magnetic transition through phase diagram

2013 ◽  
Vol 42 (41) ◽  
pp. 14836 ◽  
Author(s):  
Rupam Sen ◽  
Dasarath Mal ◽  
Armandina M. L. Lopes ◽  
Paula Brandão ◽  
João P. Araújo ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Transition Metal ◽  
Magnetic Transition ◽  
Metal Carboxylates ◽  
Layered Transition Metal ◽  
Structural Aspects

scholarly journals Porphyrin and phthalocyanine-based Metal Organic Frameworks beyond metal-carboxylates

2020 ◽  
Author(s):  
Siddhartha De ◽  
Thomas Devic ◽  
Alexandra Fateeva
Keyword(s):  
Porous Materials ◽  
Metal Organic Frameworks ◽  
Metal Carboxylates ◽  
Natural Systems ◽  
Metal Organic

Given the ubiquitous role of porphyrins in natural systems, these molecules and related derivatives such as phthalocyanines are fascinating building units to achieve functional porous materials. Porphyrin-based MOFs have been...

Isostructural metal-carboxylates MIL-100(M) and MIL-53(M) (M: V, Al, Fe and Cr) as catalysts for condensation of glycerol with acetone

2017 ◽  
Vol 529 ◽  
pp. 167-174 ◽  
Author(s):  
Maria N. Timofeeva ◽  
Valentina N. Panchenko ◽  
Nazmul Abedin Khan ◽  
Zubair Hasan ◽  
Igor P. Prosvirin ◽  
...  
Keyword(s):  
Metal Carboxylates

Macromolecular metal carboxylates

2008 ◽  
Vol 77 (3) ◽  
pp. 259-301 ◽  
Author(s):  
G I Dzhardimalieva ◽  
A D Pomogailo
Keyword(s):  
Metal Carboxylates

scholarly journals Physicochemical and Kinetics Parameters of Allanblackia floribunda Seed Oil and some of its Metal Carboxylates

2017 ◽  
Vol 5 (2) ◽  
pp. 56-62 ◽  
Author(s):  
Olujinmi Moses Folarin ◽  
Ayodele Samuel Oreniyi ◽  
Opeoluwa Gabriel Oladipo
Keyword(s):  
Seed Oil ◽  
Kinetics Parameters ◽  
Metal Carboxylates

scholarly journals Solid phase synthesis of calcium stearate on a modified screw equipment

2019 ◽  
Vol 58 (4) ◽  
pp. 127-132
Author(s):  
Alexander A. Momziakov ◽  
◽  
Timur R. Deberdeev ◽  
Rustam Ya. Deberdeev ◽  
Eugeny A. Pecheny ◽  
...  
Keyword(s):  
Solid Phase ◽  
Metal Salt ◽  
Mechanical Energy ◽  
Mechanical Action ◽  
Calcium Stearate ◽  
Chemical Additives ◽  
Metal Carboxylates ◽  
New Approach ◽  
Solution Methods ◽  
Full Factorial

Metal stearates are widely used in various industries: as a thickener, lubricants, auxiliary desiccant, emulsifier for cosmetics, chemical additives to synthetic rubbers and a stabilizing component in polyolefins (PE, PP), ABS plastic, polystyrene, polyamide and polyvinyl chloride ( PVC). The greatest interest in using the metal salt of stearic acid is stabilization of PVC. At present, technologies for the synthesis of divalent metal carboxylates have evolved in three directions: synthesis technology in solution, in the melt and in the solid phase. The latter was the most laborious at the end of the last century due to the lack of equipment that allowed the imposition of mechanical energy on the material in sufficient quantity to initiate chemical transformation. In the literature, experiments are carried out on planetary mills, attritors, rollers and Bridgman anvils. In devices of a similar design, the best conditions for the chemical process between the components of the reaction mixture are created. The chemical reaction proceeds as a result of the creation and subsequent relaxation of the stress field when applying a mechanical action to the reaction mixture. However, they did not give a high selectivity for the target product; therefore, the chemical industry of stabilizing additives focused on solution methods for producing metal carboxylates. The authors of the article have developed a new approach for the synthesis of calcium stearate in the solid phase on a modified screw apparatus. Screw machines, in turn, provide an increase in the number of contacts between reagents and, more significantly, the area of the contact interface. In addition, heat generation due to friction in the contact area can further intensify the process. The influence of the temperature range inside the material cylinder - the reactor, the screw rotation speed on the technical characteristics and the yield of calcium stearate was investigated. Mathematical processing of the results of the full factorial experiment was carried out. A comparison of the adequacy of the obtained linear equation and experimental data is carried out.

scholarly journals Surface analysis of polymers end-capped with metal carboxylates using x-ray photoelectron spectroscopy

1986 ◽  
Vol 27 (1) ◽  
pp. 93-105 ◽  
Author(s):  
R. Jerome ◽  
Ph. Teyssie ◽  
J.J. Pireaux ◽  
J.J. Verbist
Keyword(s):  
Surface Analysis ◽  
Photoelectron Spectroscopy ◽  
Metal Carboxylates ◽  
X Ray
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