Maleic Anhydride, Maleic Acid, and Fumaric Acid

2005 ◽  
Author(s):  
Joseph C. Burnett ◽  
Scott F. Mitchell ◽  
Michael J. Mummey
Keyword(s):  
Maleic Anhydride ◽  
Fumaric Acid ◽  
Maleic Acid

Maleic Anhydride, Maleic Acid, and Fumaric Acid

2000 ◽  
Author(s):  
Timothy R. Felthouse ◽  
Joseph C. Burnett ◽  
Scott F. Mitchell ◽  
Michael J. Mummey
Keyword(s):  
Maleic Anhydride ◽  
Fumaric Acid ◽  
Maleic Acid

Solid-phase polymerization of maleic anhydride at high pressures

1967 ◽  
Vol 20 (4) ◽  
pp. 605 ◽  
Author(s):  
SD Hamann
Keyword(s):  
Maleic Anhydride ◽  
Melting Temperature ◽  
Fumaric Acid ◽  
Maleic Acid ◽  
High Pressures ◽  
Sorbic Acid ◽  
Solid Phase ◽  
Polymorphic Transition ◽  
Spontaneous Polymerization ◽  
Trans Stilbene

Solid maleic anhydride undergoes spontaneous polymerization when it is heated to 100-170�0 at pressures above 20000 atm. On a pressure- temperature diagram, the regions of monomer stability and of polymerization are separated by a rather well-defined line, which possibly marks the occurrence of a physical polymorphic transition. The structure of the polymer is discussed. Efforts to polymerize some other 1,2-disubstituted ethylenes have been unsuccessful. The following substances were recovered unchanged after being heated to 160-180�0 at 30000-45000 atm: maleic acid, fumaric acid, crotonic acid, sorbic acid, coumarin, and trans-stilbene.�The melting temperature of maleic anhydride has been measured to 3770 atm and the parameters in the Simon melting equation are reported.

Maleic Anhydride, Maleic Acid, and Fumaric Acid

2001 ◽  
Author(s):  
Timothy R. Felthouse ◽  
Joseph C. Burnett ◽  
Ben Horrell ◽  
Michael J. Mummey ◽  
Yeong-Jen Kuo
Keyword(s):  
Maleic Anhydride ◽  
Fumaric Acid ◽  
Maleic Acid

Cyclopentadienyl-, Indenyl- und Trifluormethylcyclopentadienyl-Cobalt-Komplexe mit Akzeptor-substituierten Olefinen als Liganden / Cyclopentadienyl, Indenyl and Trifluoromethylcyclopentadienyl Cobalt Complexes with Acceptor-Substituted Olefins as Ligands

1991 ◽  
Vol 46 (10) ◽  
pp. 1364-1376 ◽  
Author(s):  
Helmut Werner ◽  
Joachim Mahr
Keyword(s):  
Maleic Anhydride ◽  
Acrylic Acid ◽  
Metal Complexes ◽  
Fumaric Acid ◽  
Maleic Acid ◽  
Energy Barrier ◽  
Acid Amide ◽  
Cobalt Complexes ◽  
Cobalt Compounds

The complexes C5H5Co(PMe3)2 (1), C9H7Co(PMe3)2 (2) and (C5H4CF3)Co(PMe3)2 (3) react with mono- and disubstituted ethenes such as styrene, acrylic acid methylester, methylvinylketone, acroleine, acrylic acid amide, acrylonitrile, maleic anhydride, maleic and fumaric acid dimethylester, and fumaric dinitrile to give the olefin(phosphane)cobalt compounds (ring)Co(PMe3)(olefin) (4-32) in good to excellent yields. With acrylonitrile, two different rotamers are obtained which indicates that there is a considerable energy barrier for rotation around the metal-olefin bond. The reactions of 1 and 3 with maleic acid dimethylester (MDE) lead not only to the formation of the expected products (ring)Co(PMe3)(MDE) (22, 23) but also to the thermodynamically favored isomers (ring)Co(PMe3)(FDE) (24, 26) containing fumaric acid dimethylester (FDE) as ligand. A similar isomerization has been observed upon treatment of 2 and 3 with fumaric dinitrile (FDN) which gives besides the complexes (ring)Co(PMe3)(FDN) (29, 31) also the maleic dinitrile (MDN) derivatives (ring)Co(PMe3)(MDN) (30, 32). The olefin(trimethylphosphane)cobalt compounds are surprisingly inert and neither on photolysis nor on heating give the isomeric hydrido(vinyl)metal complexes.

The Effects of Sodium Citrate and an Excess of Plasminogen on Fibrinolytic Agents

1960 ◽  
Vol 04 (03) ◽  
pp. 462-472 ◽  
Author(s):  
Tage Astrup ◽  
Ida Sterndorff
Keyword(s):  
Fumaric Acid ◽  
Maleic Acid ◽  
Fibrinolytic Activity ◽  
Sodium Citrate ◽  
Plasminogen Activators ◽  
Fibrinolytic Agents ◽  
Enhancing Effect ◽  
Polycarboxylic Acids

Summary1. The presence of citrate in the normal fibrin enhanced the fibrinolytic activity of plasminogen activators, including trypsin. The effect of proteases (on normal or on heated fibrin, containing citrate) was not significantly influenced.2. The effect of plasminogen activators was also increased when excess of plasminogen was present in the normal fibrin plates.3. Fumaric acid and maleic acid belong to the polycarboxylic acids producing an enhancing effect.

Synthesis and ethylene-promoted metathesis of adducts of tandem [4+2]/[4+2] cycloaddition between bis-furyl dienes and maleic acid derivatives

2021 ◽  
Vol 45 (7) ◽  
pp. 3400-3407
Author(s):  
Elizaveta A. Kvyatkovskaya ◽  
Polina P. Epifanova ◽  
Eugeniya V. Nikitina ◽  
Aleksey A. Senin ◽  
Victor N. Khrustalev ◽  
...  
Keyword(s):  
Maleic Anhydride ◽  
Maleic Acid

A series of 1,4:5,8-diepoxynaphthalenes, annellated with carbo- and heterocycles, was synthesized based on the tandem intermolecular/intramolecular [4+2] cycloaddition of bis-furyl dienes with moderately to highly reactive cyclic dienophiles (maleic anhydride and maleinimides).

scholarly journals Cis-trans Isomerase Isomerisation from Maleic Acid to Fumaric Acid

1961 ◽  
Vol 25 (9) ◽  
pp. 726-730 ◽  
Author(s):  
Ken'ichi OTSUKA
Keyword(s):  
Fumaric Acid ◽  
Maleic Acid

scholarly journals THEORETICAL STUDY OF THE ISOMERIZATION OF MALEIC ACID INTO FUMARIC ACID

2011 ◽  
Vol 56 (2) ◽  
pp. 656-662 ◽  
Author(s):  
RICARDO UGARTE ◽  
CARLOS BUSTOS ◽  
IGNACIO MORENO-VILLOSLADA
Keyword(s):  
Fumaric Acid ◽  
Maleic Acid ◽  
Theoretical Study
Sign in / Sign up

Export Citation Format

Share Document