This traditional understanding has been supplanted by more recent studies that instead suggest that the N–H group(s) (or N–Ma group(s) obtained in the reaction with a base of an alkali metal Ma) serve to stabilize rate-determining transition states through non-covalent N–X···O ...
and C2 a combination of constituent A2 or A3 with the constituent B2 or B3; in a polyorganosiloxane composition D for obtaining a silicon elastomer, either cross-linkable at room temperature or by heat by reaction of polyaddition in the presence of a metal catalyst, or cross-linkable at hig...
Selenophosphinito complexes (OC)4Mn(2-SePR21) ( 2a, b ) [R1 = cyc -Hex ( a ), t Bu ( b )] are formed by the reaction of BrMn(CO)5 with the phosphane selenides R21HPSe ( 1a, b ) in the presence of the auxiliary base Et( i Pr)2N. According to an X-ray structural ...
A practical methodology for the catalytic, asymmetric synthesis of β-lactams results from the development of a catalyzed reaction of ketenes (or their derived zwitterionic enolates) and imines using benzoylquinine as chiral catalyst and proton sponge as the stoichiometric base J. Am. Chem. Soc.,...
(111), we calculated the reactants, products, intermediates and transition states in the possible reaction pathway of the SOD-MPO-like cascade catalytic activity for O2·−and Cl−on Pd (111) and Au1Pd3(111) surfaces. The O2·−radical is a Brønsted base with pKb = 9.1245,...
A novel and simple transition metal-free direct arylation of arene and N-heteroarenes with diaryliodonium salts has been developed. This cross-coupling reaction is promoted only by base and gives the desired products in moderate to good ... J Wen,RY Zhang,SY Chen,... - 《Journal of Organic...
Fig. 2. Hydrogen yield from CDM (a) Co/SiO2, (b) Ni/SiO2 (c) Fe/SiO2 with SEM analysis of carbon nanomaterial formed after completion of the reaction. Adapted with permission from Ref. [91]. Copyright (2015) Elsevier B·V. The mono-metal catalyst is not entirely effective to improve...
aAn H-type cell in NRR.bA flow cell in NRR with detection methods. Full size image 3MOF-related Electrocatalysts for Nitrogen Reduction Reaction As a naturally abundant nitrogen resource, dinitrogen gas is one of the ideal resources for the synthesis of NH3. However, due to the inert nature ...
Inert octahedral chiral-at-metal complexes are an emerging class of asymmetric catalysts that exploit the globular, rigid nature and stereochemical options of octahedral compounds. While the central transition metal serves as a structural anchorpoint and
The cooperative catalysis between lipase-active site and single Pd atom accelerates alkyl-alkyl cross-coupling reaction between 1-bromohexane and B-n-hexyl-9-BBN with high efficiency (TOF is 540 h−1), exceeding that of the traditional catalyst Pd(OAc)2 by a factor of 300 under ambient...