Light-promoted catalysis of nickel hydride complexes in the isomerization and hydrogenation of cis,cis-1,5-cyclooctadiene: mechanistic studies

1986 ◽  
Vol 64 (11) ◽  
pp. 2229-2231 ◽  
Author(s):  
Yuan L. Chow ◽  
Huali Li
Keyword(s):  
Double Bond ◽  
Mechanistic Studies ◽  
Hydride Complexes ◽  
Hydride Complex ◽  
Nickel Hydride ◽  
Subsequent Elimination

Xanthone-sensitized photoreduction of Ni(acac)2 in benzene under hydrogen, in the presence of cis,cis-1,5-cyclooctadiene (1,5-COD), causes isomerization and hydrogenation of the diene according to the consecutive transformation 1,5-COD → 1,4-COD → 1,3-COD → cyclooctene → cyclooctane. Evidence was provided that (i) a nickel hydride complex was generated, (ii) the sensitized excitation of this complex caused addition to the double bond, (iii) subsequent elimination caused isomerization, and (iv) triplet excited xanthone sensitized the transformations.

scholarly journals Light-promoted catalytic hydrogenation of olefins with nickel complexes: the formation of nickel hydrides from the reaction of Ni(I) complexes with hydrogen

1988 ◽  
Vol 66 (11) ◽  
pp. 2920-2927 ◽  
Author(s):  
Yuan L. Chow ◽  
Huali Li ◽  
Meng-Su Yang
Keyword(s):  
Double Bond ◽  
Hydride Complexes ◽  
Alkyl Complexes ◽  
Heterogeneous Catalytic ◽  
Nickel Hydride ◽  
Bicyclic System ◽  
Wide Range ◽  
Nickel Hydrides ◽  
Heterogeneous Catalytic Processes ◽  
Homogeneous Catalytic Process

The conditions pertaining to triplet excited state ketone-sensitized photoreduction of Ni(acac)2 under hydrogen were shown to serve as a method for light-promoted hydrogenation of olefins with clean chemospecificity. For example, the double bond in the bicyclic system was preferentially hydrogenated over the other double bond in dicyclopentadiene and in 5-methylenebicyclo-[2.2.1]heptene. This photohydrogenation could be run under a wide range of conditions and was apparently a homogeneous catalytic process; in a late stage of photohydrogenation, concurrence of heterogeneous catalytic processes was not ruled out. The Ni(I) complexes of tetrahydrofuran and olefins generated from the photoreduction of Ni(acac)2 were shown to react with hydrogen to give nickel hydride complexes. By analogy with the generally accepted reaction pattern, coordinated olefins in these nickel hydride complexes probably spontaneously undergo intramolecular addition to give Ni–alkyl complexes. It is suggested that these Ni–alkyl complexes are photoexcited to generate a vacant coordination site so that the reaction with hydrogen can proceed to give products and regenerate a nickel hydride catalyst.

scholarly journals Improved hydrogen storage properties of Mg/MgH2 thanks to the addition of nickel hydride complex precursors

2019 ◽  
Vol 44 (54) ◽  
pp. 28848-28862 ◽  
Author(s):  
Basile Galey ◽  
Aline Auroux ◽  
Sylviane Sabo-Etienne ◽  
Sameh Dhaher ◽  
Mary Grellier ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Hydrogen Storage Properties ◽  
Hydride Complex ◽  
Nickel Hydride ◽  
Storage Properties

Dehydrogenative Coupling of Aldehydes with Alcohols Catalyzed by a Nickel Hydride Complex

2019 ◽  
Vol 38 (7) ◽  
pp. 1468-1478 ◽  
Author(s):  
Nathan A. Eberhardt ◽  
Nadeesha P. N. Wellala ◽  
Yingze Li ◽  
Jeanette A. Krause ◽  
Hairong Guan
Keyword(s):  
Hydride Complex ◽  
Nickel Hydride ◽  
Dehydrogenative Coupling

scholarly journals Rapid oxidative hydrogen evolution from a family of square-planar nickel hydride complexes

2016 ◽  
Vol 7 (1) ◽  
pp. 117-127 ◽  
Author(s):  
Srinivasan Ramakrishnan ◽  
Sumit Chakraborty ◽  
William W. Brennessel ◽  
Christopher E. D. Chidsey ◽  
William D. Jones
Keyword(s):  
Hydrogen Evolution ◽  
Hydride Complexes ◽  
Nickel Hydride ◽  
Square Planar

One-electron oxidation in a family of square planar nickel hydride complexes leads to facile H2 evolution.

ChemInform Abstract: Reaction of Methane with Nickel Hydride Complexes Yielding Methyl Derivatives.

ChemInform ◽  
2010 ◽  
Vol 25 (33) ◽  
pp. no-no
Author(s):  
T. B. RUBTSOVA ◽  
N. V. KIRJAKOV ◽  
G. L. SOLOVEICHIK ◽  
A. E. SHILOV
Keyword(s):  
Hydride Complexes ◽  
Nickel Hydride ◽  
Methyl Derivatives

A Nickel Hydride Complex in the Active Site of Methyl-Coenzyme M Reductase: Implications for the Catalytic Cycle

2008 ◽  
Vol 130 (33) ◽  
pp. 10907-10920 ◽  
Author(s):  
Jeffrey Harmer ◽  
Cinzia Finazzo ◽  
Rafal Piskorski ◽  
Sieglinde Ebner ◽  
Evert C. Duin ◽  
...  
Keyword(s):  
Active Site ◽  
Catalytic Cycle ◽  
Coenzyme M ◽  
Hydride Complex ◽  
Nickel Hydride ◽  
Methyl Coenzyme M Reductase

Skeletal isomerization of dienes by nickel hydride complexes

1971 ◽  
Vol 12 (27) ◽  
pp. 2555-2558 ◽  
Author(s):  
L.W. Gosser ◽  
G.W. Parshall
Keyword(s):  
Skeletal Isomerization ◽  
Hydride Complexes ◽  
Nickel Hydride

Stable nickel hydride complexes

1970 ◽  
Vol 9 (2) ◽  
pp. 394-395 ◽  
Author(s):  
R. A. Schunn
Keyword(s):  
Hydride Complexes ◽  
Nickel Hydride
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