Polymerization of ?-propiolactone via nickel-chelate complexes

1991 ◽  
Vol 27 (2) ◽  
pp. 185-191 ◽  
Author(s):  
J. Belleney ◽  
R. Blottiau ◽  
F. J. Carriere
Keyword(s):  
Chelate Complexes ◽  
Nickel Chelate

Synthesis of heterogeneous olefin-oligomerization catalysts using homogeneous nickel-chelate complexes as a basis

Polyhedron ◽  
1990 ◽  
Vol 9 (23) ◽  
pp. 2823-2831 ◽  
Author(s):  
Alison M.A. Bennett ◽  
Gary A. Foulds ◽  
David A. Thornton
Keyword(s):  
Chelate Complexes ◽  
Nickel Chelate ◽  
Olefin Oligomerization

scholarly journals The partial molal volume of two nickel chelate complexes

1980 ◽  
Vol 58 (17) ◽  
pp. 1795-1798 ◽  
Author(s):  
Y. K. Sze ◽  
W. A. E. McBryde
Keyword(s):  
Ethylenediaminetetraacetic Acid ◽  
Structural Features ◽  
Partial Molal Volume ◽  
Spectral Measurements ◽  
Chelate Complexes ◽  
Molal Volume ◽  
Nickel Chelate ◽  
Partial Molal Volumes ◽  
Molal Volumes ◽  
Methyliminodiacetic Acid

Partial molal volumes have been determined for the nickel(II) complexes of ethylenediaminetetraacetic acid (mono complex) and methyliminodiacetic acid (bis complex). The formation of these is accompanied by appreciable increases in volume, greater in the case of the second ligand. The observations are discussed in terms of reduced electrostriction of water by the complexes, and the different volume increases are accounted for by structural features of the complexes which are partially confirmed by spectral measurements.

Formation of η1-P-(2-Phosphinophenol)Ni(0)(PMe3)3 and Oxidation to cis/trans-Bis(2-phosphinophenolato)nickel(II) Complexes

1999 ◽  
Vol 54 (10) ◽  
pp. 1235-1243 ◽  
Author(s):  
Joachim Heinicke ◽  
Attila Dal ◽  
Hans-Friedrich Klein ◽  
Olaf Hetche ◽  
Ulrich Flörke ◽  
...  
Keyword(s):  
Solid State ◽  
Low Temperatures ◽  
Structure Elucidation ◽  
Solution Structure ◽  
Coupling Constants ◽  
Planar Geometry ◽  
Geometric Isomers ◽  
Chelate Complexes ◽  
Nickel Chelate ◽  
Square Planar

o-Phosphinophenols 1 (P⌒OH ) react with equimolar amounts of Ni(PMe3)4 at low temperatures to give yellow Ni(0) complexes such as [(HO∼P)Ni(PMe3)3] 2a with only P coordination of the P⌒OH ligand. Oxidation of solutions of 1 and Ni(PMe3)4 by dioxygen leads to brown bis(o-phosphinophenolato-P⌒O)nickel chelate complexes 3a-d. Structure elucidation by NMR is consistent with a cis-square planar geometry for 3a-c and a trans-square planar solution structure of the tert-butylphenylphosphino derivative 3d. The geometric isomers were distinguished by different ranges of phosphorus coordination shifts and 31P-13C-2 and 31P-13C-1 coupling constants. In the solid state, 3d adopts also a cis-square planar geometry. The steric stress of the substituents causes anti-orientation of the tert-butyl groups at phosphorus (R,R and S,S diastereoisomers) and a significant distorsion (22°) of the planes of the two five-membered rings. With less bulky substituents the R,S and S,R diastereoisomers are preferred as in the cis-square planar complex 3c with syn-orientation of the two isopropyl and phenyl groups, respectively.

NICKEL CHELATE COMPLEXES AS A SINGLE-SOURCE PRECURSOR OF NANOCOMPOSITES

2017 ◽  
Vol 8 (4) ◽  
pp. 331-346
Author(s):  
G. I. Dzhardimalieva ◽  
N. N. Volkova ◽  
Vitaly A. Shershnev ◽  
N. D. Golubeva ◽  
A. S. Burlov ◽  
...  
Keyword(s):  
Single Source ◽  
Chelate Complexes ◽  
Nickel Chelate ◽  
Single Source Precursor

Linear Oligomerization of olefins via nickel chelate complexes and mechanistic considerations based on semi-empirical calculations

1979 ◽  
Vol 6 (2) ◽  
pp. 79-97 ◽  
Author(s):  
Wilhelm Keim ◽  
Bernd Hoffmann ◽  
Rainer Lodewick ◽  
Marcel Peuckert ◽  
Gunter Schmitt ◽  
...  
Keyword(s):  
Chelate Complexes ◽  
Nickel Chelate ◽  
Linear Oligomerization ◽  
Semi Empirical
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