Generation of Annelated Dicarbenes and Their Alkali-Metal Chelate Complexes in Solution: Equilibrium between Hetero- and Homoleptic NHC Lithium Complexes

2018 ◽  
Vol 37 (8) ◽  
pp. 1291-1303 ◽  
Author(s):  
Kim S. Flaig ◽  
Benjamin Raible ◽  
Verena Mormul ◽  
Natalie Denninger ◽  
Cäcilia Maichle-Mössmer ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Metal Chelate ◽  
Chelate Complexes ◽  
Solution Equilibrium ◽  
Lithium Complexes

Binuclear metal chelate complexes of anthraquinones having a MO4 chromophore. Part 1. Quinizarin

1987 ◽  
Vol 65 (7) ◽  
pp. 1485-1490 ◽  
Author(s):  
M. N. Bakola-Christianopoulou ◽  
P. D. Akrivos ◽  
M. Baumgarten
Keyword(s):  
Metal Ions ◽  
Magnetic Measurements ◽  
Metal Chelate ◽  
Transition Elements ◽  
Chelate Complexes ◽  
Cobalt Nickel ◽  
Oxygen Donor ◽  
Nickel Copper ◽  
Square Planar ◽  
Coordination Spheres

Homobinuclear metal chelate complexes having 1,4-dihydroxy-9,10-anthracenedione (quinizarin) as a bridging unit have been prepared with four bivalent first row transition elements, namely cobalt, nickel, copper, and zinc. The coordination spheres of the metal ions consist of two nearly equivalent six-membered rings with oxygen donor atoms derived from the quinizarin and the terminal ligands which are either β-diketones or salicylic aldehyde. TG, spectroscopic (ir, uv–vis, epr), and magnetic measurements have been applied to an investigation of the geometry adopted by the MO4 chromophores. The results are consistent with varying degrees of distortion from the ideal square planar toward a tetrahedral arrangement around the metal ions, closely related to the specific metal center involved.

Improving the Tribological Properties of Polyethylene Products by Modification with Metal Chelate Complexes

2019 ◽  
Vol 40 (4) ◽  
pp. 321-325
Author(s):  
G. A. Danusina ◽  
P. D. Derlugian ◽  
V. G. Shishka ◽  
S. N. Lyubchenko ◽  
A. A. Kuzarov ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Metal Chelate ◽  
Chelate Complexes

DIRECT ELECTROCHEMICAL SYNTHESIS OF SOME METAL CHELATE COMPLEXES

1978 ◽  
Vol 8 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Jacob J. Habeeb ◽  
Dennis G. Tuck ◽  
Frederick H. Walters
Keyword(s):  
Electrochemical Synthesis ◽  
Metal Chelate ◽  
Chelate Complexes

AlPO4 Molecular Sieves Modified with Metal Chelate Complexes

1992 ◽  
Vol 57 (4) ◽  
pp. 774-780 ◽  
Author(s):  
Stanisłav Kowalak ◽  
Kenneth J. Balkus
Keyword(s):  
Ion Exchange ◽  
Metal Complexes ◽  
Molecular Sieves ◽  
Metal Chelate ◽  
New Method ◽  
Cyclohexene Oxidation ◽  
Chelate Complexes ◽  
Pore System ◽  
Catalytic Applications ◽  
Exchange Properties

A new method for modification AlPO4 molecular sieves has been presented. Lack of ion-exchange properties makes the modification of aluminium phosphates for catalytic applications difficult. We have developed a method that involves the crystallization of AlPO4 molecular sieves around metal complexes. This results in encapsulation of the complexes within the intracrystalline pore system. Several metallophthalocyanines have been successfully encapsulated into AlPO4-5 and subsequently tested as catalysts for cyclohexene oxidation. Significant differences in activity result from the presence of different metallophthalocyanines.

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