Preparation of silicas combined with optically active organic compounds: optical resolution of metal chelate complexes on the silica composites

1995 ◽  
Vol 697 (1-2) ◽  
pp. 279-287 ◽  
Author(s):  
Fujio Mizukami ◽  
Hiroyuki Izutsu ◽  
Tetsuya Osaka ◽  
Yoshikatsu Akiyama ◽  
Naokazu Uiji ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Metal Chelate ◽  
Optical Resolution ◽  
Optically Active ◽  
Chelate Complexes

scholarly journals Antifungal and growths regulation activity of new metal-organic compounds

2019 ◽  
Vol 16 (2) ◽  
pp. 143-149
Author(s):  
O. V. Bashta ◽  
L. P. Pasichnyk ◽  
N. M. Voloshchuk ◽  
G. G. Repich ◽  
O. O. Zholob ◽  
...  
Keyword(s):  
Seed Germination ◽  
Organic Compounds ◽  
Copper Complex ◽  
Inhibition Zone ◽  
Diffusion Method ◽  
Chelate Complexes ◽  
Inhibition Zone Diameter ◽  
Zone Diameter ◽  
Grain Crops ◽  
Metal Organic

The aim of present paper is to study the antifungal activity of the new platinum, palladium and copper chelate complexes with different organic ligands against Fusarium strains and to determine the influence of these compounds on the germination energy and seed germination of investigated grain crops. Methods. In vitro antifungal activities of new chelate complexes were studied by the agar disk diffusion method. New complexes were tested against pathogenic Fusarium strains such as — F. culmorum 3260/4, F. verticillioides and F. sporotrichioides. The toxic effect of new complexes was evaluated according to changes in germination power and seed germination of grain crops — winter wheat, vernal barley and maize. The determination of these characteristics was carried out in accordance with the standard demands. Results. Our results revealed that palladium complex H exhibited fungicidal activity against F. culmorum 3260/4 and fungistatic activity against F. verticillioides with growth inhibition zone diameter 25 mm ad 20 mm respectively. Copper complex 2 showed a moderate fungicidal effect against F. culmorum 3260/4 strain (inhibition zone diameter 12 mm). The treatment of grain crops seeds with the H and 2 complexes demonstrated the less toxicity than standard agent — commercial fungicide tebuconazol. These complexes had also less negative influence on the germination power for all test cultures than tebuconazol. Copper complex 2 showed a noticeable growth promoting effect on studied seeds compared to seeds under conditions without treatment. Conclusions. Thus, the studied complexes can be considered as promising antifungal agents with growth regulating properties. The directional modification of the complexes to obtain the more potent derivatives will be performed.Keywords: metal-organic compounds, antifungal, growths regulation activity.

Controlled racemization of optically active organic compounds: Prospects for asymmetric transformation

Tetrahedron ◽  
1997 ◽  
Vol 53 (28) ◽  
pp. 9417-9476 ◽  
Author(s):  
Eelco J. Ebbers ◽  
Gerry J.A. Ariaans ◽  
Joannes P.M. Houbiers ◽  
Alle Bruggink ◽  
Binne Zwanenburg
Keyword(s):  
Organic Compounds ◽  
Optically Active ◽  
Asymmetric Transformation

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.

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