A novel type of coordination mode of chloranilic acid leading to the formation of polymeric coordination ribbon in the series of mixed-ligand copper(ii) complexes with 1,10-phenanthroline

2014 ◽  
Vol 43 (19) ◽  
pp. 7208-7218 ◽  
Author(s):  
Krešimir Molčanov ◽  
Marijana Jurić ◽  
Biserka Kojić-Prodić
Keyword(s):  
Ir Spectroscopy ◽  
Coordination Mode ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Chloranilic Acid ◽  
X Ray ◽  
Polymeric Coordination

A series of four novel mixed-ligand complexes of copper(ii) with 3,6-dichloro-2,5-dihydroxybenzoquinone (chloranilic acid) and 1,10-phenanthroline was prepared and characterised by X-ray analysis and IR spectroscopy.

Interaction of ditertiary phosphines with phenyl- and 1-naphthyldithiocarbamatonickel(II)

1985 ◽  
Vol 50 (6) ◽  
pp. 1383-1390
Author(s):  
Aref A. M. Aly ◽  
Ahmed A. Mohamed ◽  
Mahmoud A. Mousa ◽  
Mohamed El-Shabasy
Keyword(s):  
Thermal Analysis ◽  
Powder Diffraction ◽  
Spin Structure ◽  
Magnetic Measurements ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
X Ray ◽  
Square Planar

The synthesis of the following mixed ligand complexes is reported: [Ni(phdtc)2(dpm)2], [Ni(phdtc)2(dpe)2], [Ni(phdtc)2(dpp)3], [Ni(1-naphdtc)2(dpm)2], [Ni(1-naphdtc)2], and [Ni(1-naphdtc)2(dpp)2], where phdtc = PhNHCSS-, 1-naphdtc = 1-NaPhNHCSS-, dpm = Ph2PCH2PPh2, dpe = Ph2P(CH2)2PPh2, and dpp = Ph2P(CH2)3PPh2. The complexes are characterised by microanalysis, IR and UV-Vis spectra, magnetic measurements, conductivity, X-ray powder diffraction, and thermal analysis. All the mixed ligand complexes are diamagnetic, and thus a square-planar or square-pyramidal (low-spin) structure was proposed for the present complexes.

Preparation, Spectral and Structural Characterization of Two Polymeric 1:1 Mixed Ligand Complexes of Copper(II) Azide with 4-Methylquinoline and 2-Methylpyridine

1991 ◽  
Vol 46 (5) ◽  
pp. 687-692 ◽  
Author(s):  
Mohamed A. S. Goher ◽  
Franz A. Mautner
Keyword(s):  
Columnar Structure ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Polymeric Complex ◽  
Bridging Ligands ◽  
Space Group ◽  
X Ray ◽  
X Ray Crystallography ◽  
Centrosymmetric Dimers

Two 1:1 mixed ligand complexes of copper(II) azide with substituted quinoline and pyridine, namely catena di-μ(1,1)-azido-(4-methylquinoline)copper(II) (1) and catena di-μ(1,3)-azido-[di-μ(1,1)-azido-bis(2-methylpyridine)dicopper(II)] (2) have been prepared and characterized by X-ray crystallography.Crystal data: 1, C10H9N7Cu, space group P21/c, a = 577.8(2), b = 2202.3(5), c = 919.9(2) pm, β = 93.92(2)°, Ζ = 4, and R = 0.035 for 1293 observed MoKa data; 2, C6H7N7Cu, space group P21/a, a = 823.7(2), b = 1303.8(4), c = 895.3(3) pm, β = 112.23(2)°, Ζ = 4, and R = 0.022 for 2133 observed ΜοΚα diffractometer data. In the structure of 1, the Cu(II) has a strongly distorted trigonal bypyramidal coordination, where both azido groups function as μ(1,1) bridging ligands resulting in a columnar structure along the a axis. The polymeric complex 2 has a less distorted square pyramidal structure; one half of the azide groups act as μ(1,1) bridging ligands to form centrosymmetric dimers. These dimeric units are further connected by the remaining μ(1,3) bridging azido groups to form layers within the ab-plane. Infrared and electronic spectral data are also presented and discussed.

scholarly journals THERMODESTRUCTION OF Lа(III) COORDINATION COMPOUNDS WITH ALIPHATIC β-KETO­ESTERS

2021 ◽  
Vol 87 (8) ◽  
pp. 99-115
Author(s):  
Artem Mishchenko ◽  
Elena Trunova ◽  
Tamara Makotryk
Keyword(s):  
Carbon Dioxide ◽  
Ir Spectroscopy ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Oligomeric Structure ◽  
Temperature Range ◽  
Oxidation Of Methanol ◽  
Hydroxo Complexes ◽  
Composition Structure ◽  
First Time

Mono- and mixed-ligand complexes of La (III) with aliphatic β-ketoesters were synthesized in the solid state. The complexes have the general formulas LаL2OH·H2O (L=meacac, etacac, alacac) and La(meacac)2X·nCH3OH(X = NO3, CH3COO; n = 1, 2). Their composition, structure, and thermal properties were established by chemical and thermal analysis,  IR spectroscopy. It is shown that β-ketoesters are coordinated to the La (III) ion bidentate-cyclically into monoligand hydroxocomp­lexes. Ligand complexes with methylacetoacetate have an oligomeric structure. They consist of cationic fragments [La(meacac)2]+ with bridged connection of the nitrate or acetate anions. The thermal destructions of LaL2OH·H2O (L = meacac, etacac, alacac), La(meacac)2NO3· 2CH3OH and La(meacac)2(CH3COO)·CH3OH were studied for the first time in the helium dynamic atmosphere by TGA-MS in the temperature range of 25–900 °C. Depending on the ligand, dehydratation of the hydroxo-complexes takes place in the 120–180 (meacac), 120–190 (etacac) or 110–160 °C (alacac) temperature range, and the mass loss corresponds with the detachment of one water molecule. Decomposition of mixed-ligand complexes starts with the detachment of methanol in the 60–100 °C range. For La(meacac)2NO3·2CH3OH the decomposition process is attended with oxidation of methanol to carbon dioxide due to reduction of the nitrate-ion to nitrogen dioxide. Further heating to 300–400 °C leads to destruction of organic parts of the complexes attended with the release of low-molecular oxygen-containing organic compounds (aldehydes, ketones, alcohols), carbon dioxide and water. At ~500 °C all the La(III) complexes under study totally decompose, yielding the oxycarbonate La2O2CO3, which was fixed by IR spectroscopy. Under further heating to 850 °С oxycarbonate gradually decomposes to La2O3 liberating CO2.

X-ray absorption fine structure studies of some copper(II) mixed-ligand complexes with glutamic acid as primary ligand

2002 ◽  
Vol 31 (4) ◽  
pp. 327-331 ◽  
Author(s):  
R. K. Katare ◽  
S. K. Joshi ◽  
B. D. Shrivastava ◽  
R. N. Patel ◽  
K. B. Pandeya ◽  
...  
Keyword(s):  
Fine Structure ◽  
Glutamic Acid ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

scholarly journals X-ray absorption spectral studies of copper (II) mixed ligand complexes

2014 ◽  
Vol 534 ◽  
pp. 012008
Author(s):  
B Soni ◽  
Davood Ah Dar ◽  
B D Shrivastava ◽  
J Prasad ◽  
K Srivastava
Keyword(s):  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Spectral Studies ◽  
X Ray ◽  
X Ray Absorption
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