Partnering a Three‐Coordinate Gallium Cation with a Hydroborate Counter‐Ion for the Catalytic Hydrosilylation of CO 2

2020 ◽  
Author(s):  
Alexa Caise ◽  
Jamie Hicks ◽  
M. Ángeles Fuentes ◽  
Jose M. Goicoechea ◽  
Simon Aldridge
Keyword(s):  
Counter Ion ◽  
Catalytic Hydrosilylation

The Temperature and Counter-ion Dependency of Cation Exchange Equilibria

1960 ◽  
Vol 25 (1_2) ◽  
pp. 81-89 ◽  
Author(s):  
O. D. Bonner ◽  
G. Dickel ◽  
H. Brümmer
Keyword(s):  
Cation Exchange ◽  
Counter Ion

Determination of Organic Bases by Ion-Pair Extraction Polarography Using Orange II as Counter Ion

1992 ◽  
Vol 57 (11) ◽  
pp. 2272-2278 ◽  
Author(s):  
Václav Koula ◽  
Daria Kučová ◽  
Jiří Gasparič
Keyword(s):  
Model Compound ◽  
Differential Pulse ◽  
Ion Pair ◽  
Differential Pulse Polarography ◽  
Orange Ii ◽  
Organic Bases ◽  
Counter Ion ◽  
Pulse Polarography ◽  
Ammonium Compounds

The combination of ion-pair extraction and differential pulse polarography is shown to be a method suitable for the determination of 10-7 mol l-1 concentrations of organic bases of quaternary ammonium compounds. Orange II (4-[2-hydroxy-1-naphtyl]azobenzenesulfonic acid) was found to be an appropriate polarographically active counter-ion. The proposed method was used for the determination of tetrapentylammonium bromide (as model compound), Septonex ([1-(ethoxycarbonyl)-pentadecyl]trimethylammonium bromide) and codeine.

Synthesis of o-isopentenylphenols

1971 ◽  
Vol 24 (11) ◽  
pp. 2355 ◽  
Author(s):  
J Hlubucek ◽  
E Ritchie ◽  
WC Taylor
Keyword(s):  
Phosphoric Acid ◽  
Zinc Chloride ◽  
Boron Trifluoride ◽  
Boron Trifluoride Etherate ◽  
Stannic Chloride ◽  
Counter Ion

The effect of the solvent and the counter-ion on the ring alkylation of 3- and 4-methoxyphenols by isopentenyl bromide has been examined. Under strictly anhydrous conditions good and consistent yields of the o- isopentenylphenols were obtained with the combination potassium- toluene, but sodium-toluene was more convenient. ��� Boron trifluoride etherate was more satisfactory than stannic chloride, zinc chloride, or phosphoric acid in catalysing the condensation of 3- and 4-methoxy-phenols with 2-methylbut-3-en-2-ol to the corresponding o-isopentenylphenols. Aryl α,α-dimethylpropargyl ethers were partially hydrogenated to the corresponding α,α- dimethylallyl ethers which rearranged in boiling N,N-diethyl-aniline to o-isopentenylphenols in high overall yield.

Polymer Electrolyte Actuator Driven by Low Voltage

1999 ◽  
Vol 600 ◽  
Author(s):  
K. Oguro ◽  
K. Asaka ◽  
N. Fujiwara ◽  
K. Onishi ◽  
S. Sewa
Keyword(s):  
Polymer Electrolyte ◽  
Low Voltage ◽  
Polymer Electrolyte Membrane ◽  
Water Channel ◽  
Artificial Muscle ◽  
Ion Exchange Resin ◽  
Channel Structure ◽  
Narrow Channels ◽  
Electrolyte Membrane ◽  
Counter Ion

AbstractComposites of perfluorinated polymer electrolyte membrane and gold electrodes bend in response to low-voltage electric stimuli and work as soft actuators like muscles. The composites were prepared by chemical plating. Charge on the electrode induces electric double layer and electro-osmotic drag of water by cation from anode to cathode through narrow channels in the perfluorinated ion-exchange resin. The electro-osmotic flow of water swells the polymer near the cathode rather than anode, and the membrane bends to the anode. The actuator comprises polymer electrolyte, electrodes, counter ion, solvent, lead wires, etc. Each component affects the performance of the actuator. Surface area of electrode and species of counter ion have drastic effect on voltage-displacement response. The response may depend on water channel structure of the polymer electrolyte. Modification of these factors improved the performance and resulted in the deflection over 360 degrees at a film actuator of 10 mm length. A tubular actuator was demonstrated as a multidirectional actuator. These actuators are applicable to artificial muscle, micro robots, or micro medical equipment inside body.

Hydridosilylamido complexes of Ta and Mo isolobal with Berry's zirconocenes: syntheses, β-Si–H agostic interactions, catalytic hydrosilylation, and insight into mechanism

2016 ◽  
Vol 45 (6) ◽  
pp. 2554-2561 ◽  
Author(s):  
Nicolas A. McLeod ◽  
Lyudmila G. Kuzmina ◽  
Ilia Korobkov ◽  
Judith A. K. Howard ◽  
Georgii I. Nikonov
Keyword(s):  
Resting State ◽  
Mechanistic Studies ◽  
Catalytic Hydrosilylation ◽  
Insight Into

The β-SiH agostic complex (ArN)2Mo{η3-N(tBu)SiMe2–H}H is a pre-catalyst for hydrosilylation of carbonyls. Mechanistic studies revealed a non-hydride mechanism, with the benzoxy complex 8 being the resting state.

The (η-1,7'-2,2')4,8'-8,4'-(Bis-μ-o-phenylene)bisdicarbollidocobalt(1-)ate Ion [3-Co-4,8'-8,4'(o-C6H4)2(1,2-C2B9H9)2](-). The First Doubly Bridged Metallacarborane Complex. Synthesis, Properties and Structure

1995 ◽  
Vol 60 (8) ◽  
pp. 1297-1302 ◽  
Author(s):  
Jaromír Plešek ◽  
Stanislav Heřmánek
Keyword(s):  
Sandwich Complex ◽  
Counter Ion ◽  
Synthesis Properties

The first cobaltacarborane sandwich complex [3-Co-4,8'-8,4'(o-C6H4)2(1,2-C2B9H9)2](-) with two o-phenylene bridges between both deltahedral ligands is described. Phenylene rings containing angle of 72 grad bind the Cs counter-ion probably via π-donation. This is why the solubility of Cs salt in water is extremely low. Synthesis, properties and structure of the Cs salt are described.

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