COORDINATION COMPLEXES OF GROUP (IV) HALIDES: PREPARATION AND INFRARED SPECTRA OF COORDINATION COMPOUNDS OF TITANIUM TETRACHLORIDE, TITANIUM TETRABROMIDE, ZIRCONIUM TETRACHLORIDE, AND TIN TETRACHLORIDE WITH α,ω-DINITRILES AS LIGANDS

1963 ◽  
Vol 41 (9) ◽  
pp. 2130-2136 ◽  
Author(s):  
Sumer Chand Jain ◽  
Roland Rivest
Keyword(s):  
Infrared Spectra ◽  
Dicarboxylic Acids ◽  
Coordination Complexes ◽  
Bidentate Ligand ◽  
Group Iv ◽  
Experimental Conditions ◽  
Short Chain Length ◽  
Metal Atoms ◽  
Titanium Tetrabromide ◽  
Tin Tetrachloride

Coordination complexes between dinitriles of dicarboxylic acids and tetrahalides of titanium, zirconium, or tin have been prepared. The analytical results and the infrared spectra indicate that on working under different experimental conditions three types of compounds are obtained: 2MX4.L—L, MX4.L—L, and MX4.2L—L where MX4 is a Lewis acid and L—L a bidentate ligand. The compounds 2MX4.L—L are explained by the formation of halogen bridging between the two metal atoms. The compounds MX4.L—L are considered to be either coordination polymers or chelates of variable ring size and the compounds MX4.2L—L, ordinary addition compounds where no chelation takes place because of the mutual interaction of the two CN groups in a dinitrile of a short chain length.

CO-ORDINATION COMPLEXES OF GROUP (IV) HALIDES: PREPARATION AND INFRARED SPECTRA OF THE CO-ORDINATION COMPOUNDS OF TITANIUM TETRACHLORIDE, TITANIUM TETRABROMIDE, ZIRCONIUM TETRACHLORIDE, TIN TETRACHLORIDE, AND BORON TRICHLORIDE WITH ETHYL CYANOACETATE AS LIGAND

1964 ◽  
Vol 42 (5) ◽  
pp. 1079-1083 ◽  
Author(s):  
Sumer Chand Jain ◽  
Roland Rivest
Keyword(s):  
Infrared Spectra ◽  
Titanium Tetrachloride ◽  
Ethyl Cyanoacetate ◽  
Group Iv ◽  
Membered Ring ◽  
Zirconium Tetrachloride ◽  
Experimental Conditions ◽  
Boron Trichloride ◽  
Titanium Tetrabromide ◽  
Tin Tetrachloride

Co-ordination compounds between ethyl cyanoacetate and boron trichloride, titanium tetrabromide, and tetrachlorides of titanium, zirconium, and tin have been prepared. The analytical results indicate that under similar experimental conditions, 1:1 addition compounds are obtained in each case. On the basis of infrared spectra it has been postulated that the compounds obtained are six-membered ring chelates, satisfying the most common co-ordination number six for the elements of group IV.

COORDINATION COMPLEXES OF GROUP (IV) HALIDES: PREPARATION OF THE COMPLEXES OF TITANIUM TETRACHLORIDE, TITANIUM TETRABROMIDE, AND TIN TETRACHLORIDE WITH SOME THIO-, ISOTHIO-, AND ISO-CYANATE LIGANDS

1965 ◽  
Vol 43 (4) ◽  
pp. 787-791 ◽  
Author(s):  
Sumer Chand Jain ◽  
Roland Rivest
Keyword(s):  
Lewis Acid ◽  
Titanium Tetrachloride ◽  
Coordination Complexes ◽  
Group Iv ◽  
Experimental Conditions ◽  
Type Formula ◽  
Analytical Results ◽  
Ethyl Isocyanate ◽  
Titanium Tetrabromide ◽  
Tin Tetrachloride

Coordination complexes between ethyl thiocyanate, ethyl isothiocyanate, ethylene dithiocyanate, ethyl isocyanate, and tetrachlorides of titanium and tin and titanium tetrabromide have been prepared. The analytical results indicate that under different experimental conditions one can obtain compounds of the following type:[Formula: see text]where MX4 is a Lewis acid and L, L—L are mono- and bi-dentate ligands respectively. The complexes obtained are compared with the dinitrile complexes prepared by us previously (1).

Coordination complexes of group (IV) halides. Preparation and infrared spectra of the complexes of group (IV) halides with α-cyanoacetamide as ligand

1967 ◽  
Vol 45 (2) ◽  
pp. 139-145 ◽  
Author(s):  
Sumer Chand Jain ◽  
Roland Rivest
Keyword(s):  
Physical Properties ◽  
Coordination Polymers ◽  
Infrared Spectra ◽  
Lewis Acids ◽  
Cyano Group ◽  
Coordination Complexes ◽  
Group Iv ◽  
Amide Group ◽  
Metal Atoms

Coordination complexes between α-cyanoacetamide as ligand and the group (IV) halides as Lewis acids have been prepared. In all these compounds the ligand has been found to be a bidentate, coordinating to two different metal atoms. The infrared results indicate coordination through the nitrogen of the cyano group and one of the donor atoms of the amide group, probably nitrogen. Some physical properties of the complexes strongly suggest that they are coordination polymers.

CO-ORDINATION COMPLEXES OF TITANIUM (IV) HALIDES: II. PREPARATION AND INFRARED SPECTRA OF THE COMPLEXES OF TITANIUM TETRACHLORIDE WITH DIESTERS OF α,ω-DICARBOXYLIC ACIDS AND COMPARISON WITH ANALOGOUS COMPLEXES OF ZIRCONIUM TETRACHLORIDE AND TIN TETRACHLORIDE

1961 ◽  
Vol 39 (11) ◽  
pp. 2343-2352 ◽  
Author(s):  
Ernest Rivet ◽  
Real Aubin ◽  
Roland Rivest
Keyword(s):  
Molecular Weight ◽  
Infrared Spectra ◽  
Titanium Tetrachloride ◽  
Complex Molecule ◽  
Dicarboxylic Acids ◽  
The Other ◽  
Zirconium Tetrachloride ◽  
Melting Points ◽  
Zirconium Complexes ◽  
Tin Tetrachloride

Co-ordination complexes between diesters of α,ω-dicarboxylic acids and titanium tetrachloride, tin tetrachloride, and zirconium tetrachloride have been prepared. The analytical results, the infrared spectra, the melting points, and the molecular-weight determinations indicate that for the titanium and zirconium complexes, two types of complexes are obtained, one having a general formula MX4•1 diester in which chelate rings from five to nine atoms are formed and the other one, 2MX4•1 diester in which there are two 4-membered rings per complex molecule. With tin tetrachloride only one type of complex is formed, which has two tin tetrachlorides and two diesters per complex molecule.

Metal Ion Complexes of Arom atic Am ino Acids. III. Diacids and Polynuclear Monacids

1966 ◽  
Vol 21 (7) ◽  
pp. 626-629 ◽  
Author(s):  
J. Smith Decker ◽  
Herschel Frye
Keyword(s):  
Metal Ion ◽  
Dicarboxylic Acids ◽  
Coordination Complexes ◽  
Bidentate Ligand ◽  
Metal Ion Complexes ◽  
Naphthoic Acid ◽  
Phthalic Acids ◽  
Anthranilic Acids ◽  
Coordinated Water ◽  
Infrared Data

This research has shown that the complexes of aromatic alpha amino dicarboxylic acids and of 2-amino-3-naphthoic acid are stable to about the same degree as those of the methyl substituted anthranilic acids. Infrared data show that of the thirty-three possible compounds, eighteen exist as coordination complexes; none of these has been previously reported. Stability series have been predicted, and in the case of 2-amino-3-naphthoic acid, the sequence was identical with that of methyl substituted anthranilic acids; in the case of 3-aminophthalic acid, the order was considerably different, and no valid sequence could be derived for 2-aminoterephthalic acid. As expected, the 2-amino-3-naphthoic acid acted as a bidentate ligand, whereas the two substituted phthalic acids behaved as tridentates, although the structures assigned were different. In each case, coordinated water was possible, but often the relative unavailability of the coordination positions and the presence of varying amounts of water in the lattice of these very insoluble complexes made determination difficult. In most cases, at least one molecule of water was present.

4,4'-Bipyridine complexes with some uranyl salts

1973 ◽  
Vol 26 (9) ◽  
pp. 1871 ◽  
Author(s):  
IS Ahuja ◽  
R Singh
Keyword(s):  
Solid State ◽  
Rock Salt ◽  
Infrared Spectra ◽  
Low Frequency ◽  
Bidentate Ligand ◽  
Frequency Region ◽  
Chelating Ligands ◽  
Uranyl Chloride ◽  
Metal Atoms ◽  
Polymeric Structures

The complexes formed by 4,4?-bipyridine with uranyl chloride, sulphate, and nitrate of the type UO2(4,4?-bipyridine)X2, where X = Cl or 1/2SO4, and UO2(4,4?-bi-pyridine)1.5(NO3)2 have been prepared and their infrared spectra in the rock salt and low-frequency region (down to 200 cm-1) studied in the solid state. I.r. spectra of these complexes show that 4,4?-bipyridine acts as a bidentate ligand bridging between two metal atoms. It is suggested that the sulphate and nitrate groups act as bidentate chelating ligands and the complexes are polymeric structures.

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