Results 61 to 70 of about 8,786 (262)

Natureza da ligação Ru-NO em novos nitrosilo complexos de rutênio com ligantes quelantes CCC e CNC contendo carbenos [PDF]

, 2015
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Química, Florianópolis, 2015.Compostos capazes de liberar ou sequestrar óxido nítrico são promissores agentes ...
Coimbra, Daniel Fernando
core  

Atroposelective Construction of Axially Chiral Tetraarylethenes Via NHC‐Catalyzed Desymmetrization

Advanced Science, EarlyView.
We report the first NHC‐catalyzed atroposelective synthesis of axially chiral TAEs via oxidative desymmetrization of prochiral TAE dialdehydes. This catalytic strategy operates under mild conditions and accommodates a broad range of phenolic and nitrogen nucleophiles, delivering diverse axially chiral TAEs in good yields and up to 99% ee.
Yang‐Ze Zheng, Ting‐Rui Luan, Ming‐Hao Song, Zhaofeng Sun, Chuan‐Jun Lu, Long‐Long Xi, Ren‐Rong Liu   +6 more
wiley   +1 more source

N-Heterocyclic Carbenes in Transition Metal- and Organocatalysis [PDF]

, 2011
Design und Verwendung neuer N-heterocyclischer Carbene als Liganden in der Übergangsmetallkatalyse (Suzuki-Kupplung). Verwendung verschiedener N-heterocyclischer Carbene in der konjugierten Umpolung von alpha,beta-ungesättigten Aldehyden.Design ...
Burstein, Christian
core   +1 more source

1,3‐Imidazole‐Based Mesoionic Carbenes and Anionic Dicarbenes: Pushing the Limit of Classical N‐Heterocyclic Carbenes [PDF]

, 2023
Ghadwal R. 1,3-Imidazole Based Mesoionic Carbenes and Anionic Dicar-benes: Pushing the Limit of Classical N-Heterocyclic Carbenes. Angewandte Chemie International Edition.
Rajendra S. Ghadwal, Ghadwal, Rajendra ; https://orcid.org/   +1 more
core   +1 more source

Quantifying Magnetic Anisotropy of Ferroelectric Fe(II) Square‐Pyramidal Systems Using Torque Magnetometry

Advanced Science, EarlyView.
Five‐coordinate, square‐pyramidal Fe(II) complexes adopting polar, non‐centrosymmetric crystal structures exhibit exceptionally large easy‐axis magnetic anisotropy. Ligand‐driven distortions critically control the anisotropy, and the dielectric, Polarization vs Elecric field and piezo response studies confirm intrinsic polarization, positioning these ...
Vijaya Thangaraj, Gemma K. Gransbury, Deepanshu Chauhan, Dipanti Borah, Gopalan Rajaraman, Mauro Perfetti, Maheswaran Shanmugam   +6 more
wiley   +1 more source

N-Heterocyclic Germylenes: Structural Characterisation of Some Heavy Analogues of the Ubiquitous N-Heterocyclic Carbenes

Heteroatom Chemistry, 2019
The X-ray crystal structures of three N-heterocyclic germylenes (NHGes) have been elucidated including the previously unknown 1,3-bis(2,6-dimethylphenyl)diazagermol-2-ylidene (1).
Christopher A. Dodds, Alan R. Kennedy, Mark D. Spicer   +2 more
doaj   +1 more source

Self-Supported N-Heterocyclic Carbenes and Their Use as Organocatalysts

Molecules, 2016
The study of N-heterocyclic carbenes (NHCs) as organocatalysts has proliferated in recent years, and they have been found to be useful in a variety of reactions.
Shuang Ma, Patrick H. Toy
doaj   +1 more source

Hyperpolarization of [1‐13C]Ketoisocaproate‐d2 by Reversible Exchange with Parahydrogen Enables Profiling of Branched‐Chain‐Amino‐Acid Metabolism in Cellulo and in Vivo

Advanced Science, EarlyView.
We report the fast generation of biocompatible solutions of highly 13C‐hyperpolarized (≈11%) partially‐deuterated ketoisocaproate within <6 min using spin‐lock‐induced crossing and reversible exchange with parahydrogen (SLIC‐SABRE). This enables rapid detection of branched‐chain‐amino‐acid transferase 1 (BCAT1) protein expression and investigation of ...
Stefan Petersen, Philipp R. Groß, Paul M. Schmidt, Henri de Maissin, Asitan Rittinger, Robert Willing, Adriana Sacristán‐Martín, Lisa Heß, Jule Koch, Sebastian Lucas, Maxim Zaitsev, Dominik von Elverfeldt, Martin Grashei, Franz Schilling, Jan‐Bernd Hövener, André F. Martins, Max von Delius, Thomas Reinheckel, Andreas B. Schmidt   +18 more
wiley   +1 more source

Bis(dialkylamino)carbenes: Acyclic Analogues of N-heterocyclic Carbenes [PDF]

, 2007
Acyclische Bis(dialkylamino)carbene, die durch Deprotonierung von N,N,N,N-Tetraalkylformamidiniumsalzen erzeugt werden können, ähneln rein formal den N-heterocyclischen Carbenen.
Denk, Karin
core  

2.1.1 Historical Overview of N-Heterocyclic Carbenes in Alkene Metathesis [PDF]

, 2018
This chapter is a short outline of the historic development of the use of N-heterocyclic carbenes as co-ligands in alkene metathesis catalysts.
C. Slugovc
core   +1 more source