For example, planar tetracoordinate carbon [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ] and tetracoordinate carbon with all four bonds on the same side of a plane have been considered; the latter arrangement is the basis of the structure of pyramidane (...
While carbon typically has an oxidation state of +4 or -4, there are instances when a valence other than 4 occurs. An example is "Texas carbon," which forms 5 bonds, usually with hydrogen.
Methods for the formation of C-C bonds in heterocycles which occur via Ni- and Pd-catalyzed cross-coupling, alkenylation and alkynylation reactions are summarized. The influence of the organometallic-component and the nature of the catalyst on the efficiency of cross-coupling reactions are analyzed,...
Over the last few years, numerous hydrocarbon ring structures with triple bonds have been studied, e.g. cycloalkynes, heterocyclic compounds with triple bonds, and particularly dehydrobenzene (better known in the Anglo-American literature as benzyne). Dehydrobenzene has not yet isolated. The ...
... Carcinogens that are easily oxidizable can be destroyed with milder oxidative agents, such as saturated soln of potassium permanganate in acetone, which appears to be a suitable agent for destruction of hydrazines or of compounds containing isolated carbon-carbon double bonds. Concn or 50% ...
Reaction of a diarylgermylene with a phosphaalkyne: formation of a germadiphosphacyclobutene with an exocyclic C&z.dbd6;Ge double bond The addition of dialkyl-silylenes and -germylenes to the P&z.tbd6;C triple bonds of thermally stable phosphaalkynes represents a simple method for the synt....
The transition to net-zero is a strategic imperative for the financial sector, with trillions in capital that are aligned towards meeting the Paris Agreement3,4. Under the commitment, some financial institutions (i.e., insurers, asset managers, and fund firms) are competing to showcase their ...
The C1s spectrum from a sample with high concentration of sp2carbon will have a broad, asymmetric tail towards higher binding energy. One or more satellite features, several eV from the main C1s peak, will also be observed in samples with high sp2concentration. ...
• Maximum sorption was observed at pH = 4, with efficiency of 98.90%. • Total pore volume of 1.47 cm3 g−1; Mean pore diameter of 7.48 nm. • Kinetics well explained by pseudo-second-order model. Table 4. Comparison of various adsorbents activity towards Bisphenol A. AdsorbateAdsor...
To gain photocatalytic activity, in addition to maintaining the carbonaceous nature free of metal, several studies are working with the doping of this material using different anions. Due to their high electronegativity and ionization potentials, these anions generally form covalent bonds by gaining elec...