ChemInform Abstract: SYNTHESIS OF A BINUCLEAR HAFNIUM HYDRIDE COMPLEX WHICH INCORPORATES HYBRID MULTIDENTATE LIGANDS

1983 ◽  
Vol 14 (16) ◽  
Author(s):  
M. D. FRYZUK ◽  
H. D. WILLIAMS
Keyword(s):  
Multidentate Ligands ◽  
Hydride Complex ◽  
Hafnium Hydride

N-Insertion reaction mechanisms of phenyl azides with a hafnium hydride complex: a quantum chemistry calculation

2017 ◽  
Vol 41 (12) ◽  
pp. 5007-5011
Author(s):  
Hujun Xie ◽  
Lihong Wang ◽  
Yang Li ◽  
Jian Kuang ◽  
Zunyi Wu ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Reaction Mechanisms ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Insertion Reaction ◽  
Quantum Chemistry Calculation ◽  
Functional Theory ◽  
Hydride Complex ◽  
Chemistry Calculation ◽  
Hafnium Hydride

Detailed reaction mechanisms for the reaction of a hafnium hydride complex with phenyl azides were investigated with the help of density functional theory calculations.

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>

scholarly journals NMR, X-Ray and MS Investigations of Ethyl 2-Aroyl-and Ethyl 2-Arylcarbamoyl-4,5- dimethyl-1,2,3,6-tetrahydropyridazine-1- carboxylates: Flexible Multidentate Ligands

1999 ◽  
Vol 23 (3) ◽  
pp. 186-187
Author(s):  
Erkki Kolehmainen ◽  
Katri Laihia ◽  
Maija Nissinen ◽  
Kalevi Pihlaja ◽  
Alexander Perjéssy ◽  
...  
Keyword(s):  
Structure Analysis ◽  
Multidentate Ligands ◽  
X Ray ◽  
C Nmr

The 1H and 13C NMR spectral assignments of ethyl 2-aroyl-4,5-dimethyl-1,2,3,6-tetrahydropyridazine-1-carboxylates (1a-1h) and ethyl 2-arylcarbamoyl-4,5-dimethyl-1,2,3,6-tetrahydropyridazine-1-carboxylates (2a-2k) are given based on DQF COSY, 1H,13C HMQC and 1H,13C HMBC-measurements; the dynamics of the tetrahydropyridazine ring has been studied by 1H, 1H EXSY-technique and the structure of one congener (4′-methylphenyl-derivative, 2a) has been confirmed by X-ray structure analysis.

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

N-Heterocyclic Carbene-Stabilized Gold Nanoparticles: Mono- Versus Multidentate Ligands

2021 ◽  
Vol 33 (3) ◽  
pp. 921-933 ◽  
Author(s):  
Neda Arabzadeh Nosratabad ◽  
Zhicheng Jin ◽  
Liang Du ◽  
Mannat Thakur ◽  
Hedi Mattoussi
Keyword(s):  
Gold Nanoparticles ◽  
Multidentate Ligands

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.

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