Pericyclic Reactions Involving Catalytic Metal–Vinylidene Complexes

2006 ◽  
Vol 12 (25) ◽  
pp. 6450-6456 ◽  
Author(s):  
Jesús A. Varela ◽  
Carlos Saá
Keyword(s):  
Pericyclic Reactions ◽  
Vinylidene Complexes ◽  
Catalytic Metal

New cyclizations via catalytic ruthenium vinylidenes

2008 ◽  
Vol 80 (5) ◽  
pp. 1167-1177 ◽  
Author(s):  
Jesús A. Varela ◽  
Carlos González-Rodríguez ◽  
Silvia G. Rubín ◽  
Luis Castedo ◽  
Carlos Saá
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Nucleophilic Attack ◽  
Terminal Alkynes ◽  
Pericyclic Reactions ◽  
Catalytic Metal ◽  
Cyclic Compounds

New carbocyclizations that proceed via catalytic metal-vinylidenes are presented. Metal-vinylidene catalytic species, which are easily accessible from terminal alkynes and catalytic amounts of transition-metal complexes, can be involved either in pericyclic reactions or in tandem processes triggered by nucleophilic attack at the electrophilic position of the vinylidene. In both cases, a wide variety of valuable cyclic compounds are easily accessible. Some recent carbocyclizations will be described.

scholarly journals CO Detection Investigation at High Temperature by SiC MISFET Metal/Oxide Gas Sensors

Proceedings ◽  
2021 ◽  
Vol 56 (1) ◽  
pp. 41
Author(s):  
Lida Khajavizadeh ◽  
Anita Lloyd Spetz ◽  
Mike Andersson
Keyword(s):  
High Temperature ◽  
Gas Sensors ◽  
Elevated Temperatures ◽  
Long Term Stability ◽  
Stability Performance ◽  
Catalytic Metal ◽  
Co Detection ◽  
Effect Transistor ◽  
Metal Oxide Gas Sensors

In order to investigate the necessary device improvements for high-temperature CO sensing with SiC metal insulator semiconductor field effect transistor (MISFET)-based chemical gas sensors, devices employing, as the gas-sensitive gate contact, a film of co-deposited Pt/Al2O3 instead of the commonly used catalytic metal-based contacts were fabricated and characterized for CO detection at elevated temperatures and different CO and O2 levels. It can be concluded that the sensing mechanism at elevated temperatures correlates with oxygen removal from the sensor surface rather than the surface CO coverage as observed at lower temperatures. The long-term stability performance was also shown to be improved compared to that of previously studied devices.

scholarly journals Use of Aberration-Corrected STEM for Direct Structure and Chemistry Analysis of Catalytic Metal Particles

2011 ◽  
Vol 17 (S2) ◽  
pp. 1286-1287
Author(s):  
W Sinkler ◽  
S Bradley ◽  
L Allard ◽  
P Voyles
Keyword(s):  
Metal Particles ◽  
Catalytic Metal ◽  
Aberration Corrected Stem ◽  
Aberration Corrected

Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.

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