Five-membered metal chelate rings in complexes of palladium with 2-mercaptomethylazobenzene

1997 ◽  
Vol 7 (6) ◽  
pp. 239-240 ◽  
Author(s):  
Victor A. Kogan ◽  
Stanislav G. Kochin ◽  
Alla S. Antsyshkina ◽  
Georgii G. Sadikov ◽  
Alexander D. Garnovskii
Keyword(s):  
Metal Chelate ◽  
Chelate Rings

Conformational analysis of EDTA-type chromium(III) complexes with β-propionato metal chelate rings

2002 ◽  
Vol 609 (1-3) ◽  
pp. 1-9 ◽  
Author(s):  
Sonja Grubišić ◽  
Maja Gruden ◽  
S.R. Niketić ◽  
Narumi Sakagami- Yoshida ◽  
Sumio Kaizaki
Keyword(s):  
Conformational Analysis ◽  
Metal Chelate ◽  
Chelate Rings

scholarly journals Strong stacking interactions of metal–chelate rings are caused by substantial electrostatic component

2019 ◽  
Vol 48 (19) ◽  
pp. 6328-6332 ◽  
Author(s):  
Dušan P. Malenov ◽  
Snežana D. Zarić
Keyword(s):  
Metal Chelate ◽  
Electrostatic Energy ◽  
Stacking Interactions ◽  
Energy Component ◽  
Electrostatic Component ◽  
Chelate Rings

Stacking interactions of metal–chelate rings are strong due to very strong electrostatic energy component.

The Chemistry of Metal Chelate Rings. IV. Electrophilic Substitution of Optically Active Tris-acetylacetonates

1963 ◽  
Vol 2 (3) ◽  
pp. 576-580 ◽  
Author(s):  
James P. Collman ◽  
Robert P. Blair ◽  
Roger L. Marshall ◽  
Laird Slade
Keyword(s):  
Electrophilic Substitution ◽  
Metal Chelate ◽  
Optically Active ◽  
Chelate Rings

Disubstituted hydroxamic acids and the determination of vanadium

1968 ◽  
Vol 46 (2) ◽  
pp. 327-330 ◽  
Author(s):  
R. M. Cassidy ◽  
D. E. Ryan
Keyword(s):  
Extinction Coefficient ◽  
Metal Chelate ◽  
Visible Region ◽  
Hydroxamic Acids ◽  
Molecular Extinction Coefficient ◽  
Sensitivity Increase ◽  
Chelate Rings

A number of disubstituted hydroxamic acids were investigated as possible replacements for benzoylphenylhydroxylamine in the determination of vanadium; none is superior. At 378 mμ., p-phenylazobenzoylphenylhydroxylamine shows a marked sensitivity increase but selectivity is poor. In the visible region, there is an increase in molecular extinction coefficient as the reagent π system is extended; how ever, complete coplanarity of the aromatic and metal chelate rings is not possible and the increase is not large enough to be of much practical value.

scholarly journals Complexation Behavior of Pinene–Bipyridine Ligands towards Lanthanides: The Influence of the Carboxylic Arm

Chemistry ◽  
2021 ◽  
Vol 4 (1) ◽  
pp. 18-30
Author(s):  
Atena B. Solea ◽  
Liangru Yang ◽  
Aurelien Crochet ◽  
Katharina M. Fromm ◽  
Christophe Allemann ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Metal Chelate ◽  
Association Constants ◽  
Spectroscopic Methods ◽  
Additional Information ◽  
Mononuclear Complexes ◽  
First Case ◽  
Methylene Unit ◽  
Chelate Rings

The complexation behavior of two novel, chiral pinene–bipyridine-type ligands ((–)-HL1 and (–)-HL2) containing a carboxylic arm towards lanthanide Ln(III) (Ln = La, Eu, Lu) ions was investigated through spectroscopic methods. The association constants of the mononuclear complexes determined from the UV-Vis titrations indicated that the ligand (–)-HL1 possessing a shorter carboxylic arm formed more stable complexes compared with (–)-HL2, whose carboxylic arm had one more methylene unit. This is due to the formation of more stable seven-member metal chelate rings in the first case as compared with the eight-member metal chelate rings in the second. IR and fluorescence spectroscopy provided additional information about the structure of these complexes.

scholarly journals Conformational Analysis of Coordination Compounds. II. Dimethyl-substituted Five- and Six-membered Metal Chelate Rings.

1973 ◽  
Vol 27 ◽  
pp. 3811-3816 ◽  
Author(s):  
S. R. Niketić ◽  
F. Woldbye ◽  
Anne-Charlotte Wiehager ◽  
T. Laier ◽  
Wolfgang Nimmich
Keyword(s):  
Conformational Analysis ◽  
Coordination Compounds ◽  
Metal Chelate ◽  
Chelate Rings

The structure of [Cu(bipy)3][Cu(bipy)(ala)(ClO4)2]ClO4 � a Compound with Two Different Coordination Modes in the same Complex

2008 ◽  
Vol 59 (11) ◽  
Author(s):  
Mircea Braban ◽  
Ionel Haiduc
Keyword(s):  
Solid State ◽  
Chelate Ring ◽  
Octahedral Complex ◽  
State Structure ◽  
Complex Species ◽  
Solid State Structure ◽  
Coordination Modes ◽  
Coordination Center ◽  
Self Assembled ◽  
Chelate Rings

The paper describes the solid state structure of a compound of composition [Cu(bipy)3][Cu(bipy)(ala) (ClO4)2]ClO4, in which both the cation and anion are octahedral complex species with copper(II) as coordination center. The cation contains three chelate rings formed by bipy; the anion contains in the quatorial plane a CuONC2 chelate ring formed by the alaninato ligand and a CuN2C2 chelate ring formed by bipy, with two monodentate perchorato ligands in axial positions completing the six-coordination. In the crystal p-p stackings lead to a supramolecular self-assembled structure.

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