Si–H bond activation at {(NHC)2Ni0} leading to hydrido silyl and bis(silyl) complexes: a versatile tool for catalytic Si–H/D exchange, acceptorless dehydrogenative coupling of hydrosilanes, and hydrogenation of disilanes to hydrosilanes

2014 ◽  
Vol 43 (28) ◽  
pp. 10816 ◽  
Author(s):  
David Schmidt ◽  
Thomas Zell ◽  
Thomas Schaub ◽  
Udo Radius
Keyword(s):  
Bond Activation ◽  
Dehydrogenative Coupling ◽  
Versatile Tool ◽  
Silyl Complexes

Rhodium(I) Silyl Complexes for C–F Bond Activation Reactions of Aromatic Compounds: Experimental and Computational Studies

2013 ◽  
Vol 32 (14) ◽  
pp. 3795-3807 ◽  
Author(s):  
Anna Lena Raza ◽  
Julien A. Panetier ◽  
Michael Teltewskoi ◽  
Stuart A. Macgregor ◽  
Thomas Braun
Keyword(s):  
Aromatic Compounds ◽  
Bond Activation ◽  
Computational Studies ◽  
Silyl Complexes

Identifications and electronic characterizations of four cyclodehydrogenation products of H2TPP molecules on Au(111)

2021 ◽  
Author(s):  
Jianchen Lu ◽  
Binbin Da ◽  
Wei Xiong ◽  
Renjun Du ◽  
Zhenliang Hao ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Scanning Tunneling Microscopy ◽  
Bond Activation ◽  
Scanning Tunneling ◽  
Coupling Reactions ◽  
Tunneling Microscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Dehydrogenative Coupling

C–H bond activation and dehydrogenative coupling reactions have always been significant approaches to construct microscopic nanostructures on surfaces. By using scanning tunneling microscopy/spectroscopy (STM/STS) and non-contact atomic force microscopy (nc-AFM)...

scholarly journals Copper-Catalyzed Direct Alkylation of Perfluoroarenes with Hydrocarbons

2019 ◽  
Author(s):  
Weilong Xie ◽  
Joon Heo ◽  
Dongwook Kim ◽  
Sukbok Chang
Keyword(s):  
Bond Activation ◽  
Copper Catalyst ◽  
Catalyst System ◽  
Side Reactions ◽  
Coupling Reactions ◽  
Cross Coupling Reactions ◽  
Dehydrogenative Coupling ◽  
Carbon Carbon Bonds ◽  
Pseudo Halides ◽  
Direct Use

Construction of carbon–carbon bonds is one of the most essential tools in chemical synthesis. In the previously established cross-coupling reactions, pre-functionalized starting materials are employed usually in the form of arylor alkyl (pseudo)halides or their metallated derivatives. However, direct use of arenes and alkanes via a twofold oxidative C–H bond activation strategy to access chemoselective C(sp2 )‒C(sp3 ) cross-couplings is highly challenging due to the low reactivity of carbon–hydrogen (C–H) bonds and the difficulty in suppressing side reactions such as homocouplings. Herein, we present a copper-catalyzed cross-dehydrogenative coupling of perfluoroarenes with alkanes. Mechanistic information was obtained by combining experimental and computational studies to suggest that the optimal diketimine copper catalyst system plays a dual role to activate both sp3 and sp2 C‒H bonds.

scholarly journals Fluorine-programmed nanozipping to tailored nanographenes on rutile TiO2 surfaces

Science ◽  
2019 ◽  
Vol 363 (6422) ◽  
pp. 57-60 ◽  
Author(s):  
M. Kolmer ◽  
R. Zuzak ◽  
A. K. Steiner ◽  
L. Zajac ◽  
M. Engelund ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Hydrogen Fluoride ◽  
High Efficiency ◽  
Bond Activation ◽  
Metal Oxide Surfaces ◽  
Titania Surface ◽  
Precursor Structure ◽  
Versatile Tool ◽  
Long Time ◽  
Rutile Titania

The rational synthesis of nanographenes and carbon nanoribbons directly on nonmetallic surfaces has been an elusive goal for a long time. We report that activation of the carbon (C)–fluorine (F) bond is a reliable and versatile tool enabling intramolecular aryl-aryl coupling directly on metal oxide surfaces. A challenging multistep transformation enabled by C–F bond activation led to a dominolike coupling that yielded tailored nanographenes directly on the rutile titania surface. Because of efficient regioselective zipping, we obtained the target nanographenes from flexible precursors. Fluorine positions in the precursor structure unambiguously dictated the running of the “zipping program,” resulting in the rolling up of oligophenylene chains. The high efficiency of the hydrogen fluoride zipping makes our approach attractive for the rational synthesis of nanographenes and nanoribbons directly on insulating and semiconducting surfaces.

Dehydrogenative Coupling Reactions with Oxidized Guanidino-Functionalized Aromatic Compounds: Novel Options for σ-Bond Activation

2016 ◽  
Vol 22 (34) ◽  
pp. 11971-11976 ◽  
Author(s):  
Ute Wild ◽  
Stefanie Federle ◽  
Arne Wagner ◽  
Elisabeth Kaifer ◽  
Hans-Jörg Himmel
Keyword(s):  
Aromatic Compounds ◽  
Bond Activation ◽  
Coupling Reactions ◽  
Dehydrogenative Coupling

scholarly journals NH4I-mediated sp3 C-H cross-dehydrogenative coupling of benzylamines with 2-methylquinoline for the synthesis of E-2-styrylquinolines

2021 ◽  
pp. 174751982110192
Author(s):  
Xue Li ◽  
Bin Huang ◽  
JiangWei Wang ◽  
YuanYuan Zhang ◽  
WeiBo Liao
Keyword(s):  
Efficient Method ◽  
Bond Activation ◽  
Metal Catalyst ◽  
Dehydrogenative Coupling ◽  
Plausible Mechanism

Without any metal catalyst, a simple and efficient method for the synthesis of E-2-styrylquinolines through sp3 C-H cross-dehydrogenative coupling of benzylamines with 2-methylquinolines mediated by NH4I under air is successfully developed. The oxidative olefination proceeded through deamination and sp3 C–H bond activation. A plausible mechanism is proposed for the construction of E-2-styrylquinolines.

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