Mononuclear Divalent Ytterbium Hydrido Complex Supported by a Super-Bulky Scorpionate Ligand

2021 ◽  
Author(s):  
Xianghui Shi ◽  
peng deng ◽  
Thayalan Rajeshkumar ◽  
Lanxiao Zhao ◽  
Laurent Maron ◽  
...  
Keyword(s):  
Hydride Complex ◽  
Scorpionate Ligand

The first mononuclear divalent ytterbium hydride complex [(TpAd,iPr)Yb(H)(THF)] (TpAd,iPr = hydrotris(3-adamantyl-5-isopropyl-pyrazolyl)borate) (2) bearing a terminal hydrido ligand was obtained by hydrogenolysis of the benzyl precursor in hexane. Complex 2 exhibited...

Dual-Function, Light Switchable Cobalt Catalysis via Active Site Metamorphosis

2019 ◽  
Author(s):  
Enrico Bergamaschi ◽  
Frédéric Beltran ◽  
Christopher Teskey
Keyword(s):  
Visible Light ◽  
Active Site ◽  
Catalytic Site ◽  
Dual Function ◽  
Catalytic Systems ◽  
Hydride Complex ◽  
Dual Functional ◽  
Multiple Processes ◽  
Olefin Migration

<p></p><p></p><p>Switchable catalysis offers opportunities to control the rate or selectivity of a reaction <i>via</i> a stimulus such as pH or light. However, few examples of switchable catalytic systems that can facilitate multiple processes exist. Here we report a rare example of such dual-functional, switchable catalysis. Featuring an easily prepared, bench-stable cobalt(I) hydride complex in conjunction with pinacolborane, we can completely alter the reaction outcome between two widely employed transformations – olefin migration and hydroboration – with visible light as the sole trigger. This dichotomy arises from ligand photodissociation which leads to metamorphosis of the active catalytic site, resulting in divergent mechanistic pathways.</p><p></p><p></p>

Zirconium-Hydride-Catalyzed Transfer Hydrogenation of Quinoline and Indole with Ammonia Borane

2021 ◽  
Author(s):  
Xin Cui ◽  
wei huang ◽  
Lipeng Wu
Keyword(s):  
Ammonia Borane ◽  
Transfer Hydrogenation ◽  
Zirconium Hydride ◽  
Indole Derivatives ◽  
Hydride Complex

Herein, by applying zirconium-hydride complex as the catalyst, the transfer hydrogenation of quinoline and indole derivatives with ammonia borane as the proton and hydride source is achieved. Up to 94%...

Regio- and stereoselective dehydrogenation of .alpha.,.omega.-diols catalyzed by a rhodium hydride complex

1986 ◽  
Vol 51 (14) ◽  
pp. 2822-2824 ◽  
Author(s):  
Youichi Ishii ◽  
Katsumi Suzuki ◽  
Takao Ikariya ◽  
Masahiko Saburi ◽  
Sadao Yoshikawa
Keyword(s):  
Hydride Complex ◽  
Alpha Omega

Ketone hydrogenation catalyzed by a new iron(ii)–PNN complex

2016 ◽  
Vol 6 (12) ◽  
pp. 4428-4437 ◽  
Author(s):  
B. Butschke ◽  
M. Feller ◽  
Y. Diskin-Posner ◽  
D. Milstein
Keyword(s):  
Hydride Complex ◽  
Mild Conditions ◽  
Ketone Hydrogenation ◽  
Proton Migration

A dearomatized Fe(ii)–hydride complex mediates the hydrogenation of enolizable ketones under very mild conditions. Deactivation occursviaintramolecular proton migration.

CO, CO2 and CS2 Activation by Divalent Ytterbium Hydrido Complex

2022 ◽  
Author(s):  
Xianghui Shi ◽  
Thayalan Rajeshkumar ◽  
Laurent Maron ◽  
Jianhua Cheng
Keyword(s):  
Hydride Complex

Treatment of divalent ytterbium hydride complex [(TpAd,iPr)Yb(H)(THF)] (TpAd,iPr = hydrotris(3-adamantyl-5-isopropyl- pyrazolyl)borate) (1) with CO, CO2 and CS2 resulted in the formation of divalent ytterbium ethenediolate complex [(TpAd,iPr)Yb]2(cis-OCH=CHO) (2), formate complex...

A substrate-dependent mechanism for the reactions of a hydrido(hydrosilylene)ruthenium complex with carbonyl compounds: insights from quantum chemical calculations

2017 ◽  
Vol 41 (1) ◽  
pp. 198-203
Author(s):  
Jian Kuang ◽  
Yang Li ◽  
Lihong Wang ◽  
Zunyi Wu ◽  
Qunfang Lei ◽  
...  
Keyword(s):  
Quantum Chemical Calculations ◽  
Carbonyl Compounds ◽  
Quantum Chemical ◽  
Ruthenium Complex ◽  
Hydride Complex ◽  
Dependent Mechanism

The reactivity difference between ketones and aldehydes towards the ruthenium silylene hydride complex is dependent on the substituents of the carbonyl substrates.

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