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....
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,...
Category 3, Compounds with Four and Three Carbon Heteroatom Bonds (Three Carbon—Heteroatom Bonds: Acid Halides; Carboxylic Acids and Acid Salts) || Produc... , 被引量: 0发表: 2006年 Recent Applications of??-Metalated Isocyanides in Organic Synthesis Being both nucleophilic and electrophilic, ...
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 ...
Regioselective vicinal diamination of carbon–carbon double bonds with two different amines is a synthetic challenge under transition metal-free conditions, especially for the synthesis of trifluoromethylated amines. However, the synthesis of ethylene diamines and fluorinated amine compounds is demanded, es...
The central allenic carbon atom of isomers 1a and 1n exhibits tri-coordination and thus makes it a case of five bonds to carbon, which is confirmed through their total bond order as observed in WBI. Both the isomers show 蟽- and 蟺-aromaticity and are predicte...
Diamond-like carbon (DLC) is a metastable form of amorphous carbon (a-C) containing a combination of four-fold coordinated sp3 sites and three-fold coordinated sp2 sites, with some of the bonds terminated by hydrogen (amorphous hydrogenated carbon, a-C:H). As a bulk material, DLC has ...
Glassy carbon consists of twisted graphene-like ribbons or sheets forming a disordered network of walls between voids of typical dimensions 1–5nm, with short-range turbostratic graphitic order on a length scale of about 1 nm and probably some sp3 interlayer bonds. ...
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 (...
We calculated the bond strength of the uranium−carbon bonds in 2, 4, and 6. The theoretically predicted bond dissociation energies (BDEs) suggest (reactions 1−3) that the introduction of pyridine substituents for phenyl enhances the bond strength, which can be explained with the contribution...