Results 51 to 60 of about 1,355 (202)

Catalyst residues severely impact the thermal stability and degradation mechanism of polycarbonates: How to turn a flaw into an opportunity [PDF]

open access: yes
Three poly(cyclohexene carbonates) with molecular weights ranging from 4.9 to 9.4 kg/mol were synthesized from cyclohexene oxide and CO2 using macrocyclic phenolate dimetallic catalysts and purified by conventional purification procedure.
Antonioli D.   +8 more
core   +1 more source

Synthesis and applications of derivatives of 1,7-diazaspiro[5.5]undecane [PDF]

open access: yes, 2018
Spiroaminals are an understudied class of heterocycle. Recently, the Barrett group reported a relatively mild approach to the most simple form of spiroaminal; 1,7-diazaspiro[5.5]undecane (I).
Almond-Thynne, Joshua
core   +1 more source

Thermodynamic Calculations in biological systems. [PDF]

open access: yes, 2005
peer ...
Amzel, L. Mario   +3 more
core  

The Rauhut–Currier Reaction: Why Phosphines Are Efficient Catalysts [PDF]

open access: yes
The crossed Rauhut-Currier reaction couples matched pairs of Michael acceptors under nucleophilic catalysis. The mechanism is often assumed to be analogous to the Morita-Baylis-Hillman reaction.
Helou de Oliveira, Pedro H.   +2 more
core   +1 more source

Evaluation of the Effect of Temperature on the Stability of Metal Soaps of Dicarboxylic Acids [PDF]

open access: yes, 2005
The thermal stability of calcium and zinc dicarboxylates was studied. The kinetics of the decomposition was studied thermogravimetrically at various temperatures. The rates of the first stage decomposition were used to assess the effect of temperature on
IKHUORIA, E.U.,
core  

Nitrogen-15 Magnetic Resonance Spectroscopy. VII. Chemical Shifts of para-Substituted Nitrobenzenes [PDF]

open access: yes, 1966
The ^(15)N chemical shifts of a series of para-substituted nitrobenzenes have been measured. Comparison with the para-^(13)C chemical shifts in monosubstituted benzenes and with ^(19)F chemical shifts in para-substituted fluorobenzenes, indicates that ...
Clark, David T., Roberts, John D.
core  

Glutarate metabolism in Pseudomonas putida is regulated by two distinct glutarate sensing transcription factors [PDF]

open access: gold, 2019
Mitchell G. Thompson   +5 more
openalex   +1 more source

Asymmetric α-amination of 3-substituted oxindoles using chiral bifunctional phosphine catalysts [PDF]

open access: yes, 2016
A highly enantioselective α-amination of 3-substituted oxindoles with azodicarboxylates catalyzed by amino acids-derived chiral phosphine catalysts is reported. The corresponding products containing a tetrasubstituted carbon center attached to a nitrogen
Gang Zhao   +7 more
core  

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