Results 41 to 50 of about 104,529 (263)

Ab Initio Calculations of Possible γ-Gauche Effects in the 13C-NMR for Methine and Carbonyl Carbons in Precise Polyethylene Acrylic Acid Copolymers

Molecules, 2013
The impacts of local polymer chain conformations on the methine and carbonyl 13C-NMR chemical shifts for polyethylene acrylic acid p(E-AA) copolymers were predicted using ab initio methods.
Todd M. Alam
doaj   +1 more source

Group 14 Metallocene Catalysts for Carbonyl Hydroboration and Cyanosilylation [PDF]

, 2023
A series of six Group 14 metallocene compounds (M = Ge, Sn, Pb) were studied as catalysts for carbonyl hydroboration and cyanosilylation reactions at room temperature.
Mallory, Fujiwara, Haley, Robertson, Allegra, Liberman-Martin   +2 more
core   +2 more sources

Crystal structures of four new iridium complexes, each containing a highly flexible carbodiphosphorane PCP pincer ligand

Acta Crystallographica Section E: Crystallographic Communications, 2018
Compound [Ir(C8H12)(C51H45P4)]Cl2 or [Ir(cod)(CH(dppm)2-κ3P,C,P)]Cl2 (1a), was obtained from [IrCl(cod)]2 and the carbodiphosphorane (CDP) salt [CH(dppm)2]Cl [where cod = cycloocta-1,5-diene and dppm = bis(diphenylphosphino)methane]. Treatment of 1a with
Gabriel Julian Partl, Felix Nussbaumer, Inge Schlapp-Hackl, Walter Schuh, Holger Kopacka, Klaus Wurst, Paul Peringer   +6 more
doaj   +1 more source

Nature of Amide Carbonyl−Carbonyl Interactions in Proteins

Journal of the American Chemical Society, 2009
Noncovalent interactions define and modulate biomolecular structure, function, and dynamics. In many protein secondary structures, an intimate interaction exists between adjacent carbonyl groups of the main-chain amide bonds. As this short contact contributes to the energetics of protein conformational stability as well as protein-ligand interactions ...
Choudhary, Amit, Gandla, Deepa, Krow, Grant R., Raines, Ronald T.   +3 more
openaire   +2 more sources

Electrochemically Driven Desaturation of Carbonyl Compounds [PDF]

, 2020
Electrochemical techniques have long been heralded for their innate sustainability as efficient methods for achieving redox reactions. Carbonyl desaturation, as a fundamental organic oxidation, is an oft-employed transformation to unlock adjacent ...
Pierre-Georges, Echeverria, Dominique, Delbrayelle, Zhen, Yao, Julien, Vantourout, Yusuke, Takahira, Samer, Gnaim, Phil, Baran, Henrik, Wilke, Jinjun, Li   +8 more
core   +2 more sources

Unified Synthesis of Polycyclic Alkaloids via Complementary Carbonyl Activation [PDF]

, 2021
A complementary dual carbonyl activation strategy for thesynthesis of polycyclic alkaloids has been developed. Successful applications include the synthesis of tetracyclic alkaloids harmalanine, harmalacinine, pentacyclic indoloquinolizidine alkaloid ...
Guoli, He, Benjamin, List, Mathias, Christmann   +2 more
core   +1 more source

An Automated Aerosol Collection and Extraction System to Characterize Electronic Cigarette Aerosols

Frontiers in Chemistry, 2021
Electronic cigarette (e-cigarette) market increased by 122% during 2014–2020 and is expected to continue growing rapidly. Despite their popularity, e-cigarettes are known to emit dangerous levels of toxic compounds (e.g., carbonyls), but a lack of ...
Yeongkwon Son, Andrey Khlystov
doaj   +1 more source

Synthesis and Structural Characterization of Manganese(I) Complexes Ligated by 2-Azabutadienes (ArS)₂C=C(H)-N=CPh₂

Molbank
The thioether-functionalized 2-azabutadienes (ArS)2C=C(H)-N=CPh2 (L1 Ar = Ph, L2 Ar = p-Tol) ligate to [Mn(CO)5Br] to form the octahedral five-membered S, N-chelate complexes fac-[MnBr(CO)3{(ArS)2C=C(H)-N=CPh2] (1 Ar = Ph; 2 Ar = p-Tol), whose crystal ...
Rodolphe Kinghat, Abderrahim Khatyr, Michael Knorr, Yoann Rousselin, Marek M. Kubicki   +4 more
doaj   +1 more source

Synthesis and Characterization of Novel Cobalt Carbonyl Phosphorus and Arsenic Clusters

Molecules
Phosphorus- and arsenic-containing cobalt clusters are an interesting class of compounds that continue to provide new structures with captivating bonding patterns.
Mehdi Elsayed Moussa, Susanne Bauer, Christian Graßl, Christoph Riesinger, Gábor Balázs, Manfred Scheer   +5 more
doaj   +1 more source

Carbonyl-Directed Addition of N‑Alkylhydroxylamines to Unactivated Alkynes: Regio- and Stereoselective Synthesis of Ketonitrones

, 2019
A variety of ketonitrones were synthesized in moderate to excellent yields with high chemo-, regio-, and stereoselectivity by using carbonyl-directed addition of N-alkylhydroxylamines to unactivated alkynes under mild conditions.
Hongwei Lin (6169187), Yingying Gong (6169190), Yuanxiang Li (4092550), Xiangqing Feng (2073784), Yanyun Liu (3027513), Yilin Liu (1991839), Lei Cao (134409), Liping Chen (119540)   +7 more
core   +1 more source