COORDINATION COMPLEXES OF TITANIUM (IV) HALIDES: IV. PREPARATION AND INFRARED SPECTRA OF THE COMPLEXES OF TITANIUM TETRACHLORIDE WITH CHLORINE-SUBSTITUTED ESTERS OF MONOBASIC ACIDS AS LIGANDS

1962 ◽  
Vol 40 (12) ◽  
pp. 2243-2248 ◽  
Author(s):  
Sumer Chand Jain ◽  
Roland Rivest
Keyword(s):  
Infrared Spectra ◽  
Alkyl Radical ◽  
Titanium Tetrachloride ◽  
Coordination Complexes ◽  
Melting Points ◽  
Ether Group ◽  
Basic Properties ◽  
Acid Radical ◽  
Chlorine Substitution ◽  
Coordination Bonds

Coordination complexes between titanium tetrachloride and some chlorine-substituted monoesters have been prepared.Infrared spectra of these complexes and their melting points indicate that the strength of the coordination bonds decreases as the number of chlorines increases in the acid radical. When the substitution is in the alkyl radical, it is possible to prepare complexes of the formula TiCl4•2 ester, since the chlorine substitution decreases the basic properties of the oxygen of the ether group in the ligand.

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.

COORDINATION COMPLEXES OF TITANIUM (IV) HALIDES: III. PREPARATION AND INFRARED SPECTRA OF THE COMPLEXES OF TITANIUM TETRACHLORIDE WITH UREA, THIOUREA, AND SOME OF THEIR DERIVATIVES

1962 ◽  
Vol 40 (12) ◽  
pp. 2234-2242 ◽  
Author(s):  
Roland Rivest
Keyword(s):  
Molecular Weight ◽  
Oxygen Atom ◽  
Infrared Spectra ◽  
Titanium Tetrachloride ◽  
Coordination Complexes ◽  
Dinuclear Complexes ◽  
Derivatives Of

The following coordination complexes of titanium (IV) have been prepared: TiCl4•2CO(NH2)2, TiCl4•CO(NHCH3)2, TiCl4•2CO(NHCH3)2, 2TiCl4•2NH2CON(C6H5)2, 2TiCl4•2CO(NHC6H5)2 TiCl4•2CS(NH2)2, 2TiCl4•CS(NHC2H5)2, 2TiCl4•NH2CSN(C6H5)2, and 2TiCl4•CS(NHC6H5)2; their infrared spectra have been measured and their molecular weight determined. For urea and its derivatives the coordination to titanium (IV) is always through the oxygen atom. The phenyl derivatives of urea led to dinuclear complexes which were best explained by assuming halogen bridging between the titanium atoms. Thiourea and its derivatives gave complexes in which coordination occurred through one of the nitrogens in the case of thiourea and through both nitrogens in the case of the derivatives. Halogen bridging was again assumed to explain the formation of the dinuclear complexes.

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 acetylene diphosphines. II. Diphosphine bridged palladium(II) and platinum(II) derivatives

1969 ◽  
Vol 47 (14) ◽  
pp. 2573-2578 ◽  
Author(s):  
A. J. Carty ◽  
A. Efraty
Keyword(s):  
Molecular Weight ◽  
Infrared Spectra ◽  
Coordination Complexes ◽  
Weight Data

Complexes of the type (MX2)2(DPPA)2 (M = Pd, Pt; X = Cl, Br, I, SCN; DPPA = bis(diphenylphosphino)acetylene) have been prepared and characterized. Raman, infrared, and molecular weight data have been used to show that the structures are binuclear with bridging bis(diphenylphosphino)acetylene groups. The infrared spectra of the compounds [M(SCN)2]2(DPPA)2 are suggestive of the presence of both N and S bonded thiocyanate within the same molecule.

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).

Xanthotoxin and Bergapten in Spring Parsley

Weed Science ◽  
1970 ◽  
Vol 18 (4) ◽  
pp. 479-480 ◽  
Author(s):  
M. Coburn Williams
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Infrared Spectra ◽  
Growing Season ◽  
Melting Points ◽  
Plant Samples ◽  
Rf Values ◽  
Layer Chromatography

Two phototoxic compounds, xanthotoxin (8-methoxysporalen) and bergapten (5-methoxypsoralen), were isolated from spring parsley [Cymopterus watsonii(Coult. & Rose) Jones] by thin-layer chromatography, and identified by comparison of Rf values, infrared spectra, and melting points, with pure samples. The concentration of xanthotoxin was two to four times that of bergapten in plant samples collected during the 2-month growing season. Seeds contained xanthotoxin and bergapten in equal concentrations.

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.

Physico-Chemical Characterization of Some 5,5-Disubstituted-1,3-Dixanthyl Barbituric Acids

1967 ◽  
Vol 21 (4) ◽  
pp. 225-231 ◽  
Author(s):  
B. C. Flann ◽  
J. A. R. Cloutier
Keyword(s):  
Experimental Data ◽  
Powder Diffraction ◽  
Infrared Spectra ◽  
Chemical Characterization ◽  
Melting Points ◽  
X Ray ◽  
Physico Chemical ◽  
Diffraction Patterns ◽  
Derivatives Of

The dixanthyl derivatives of 21 clinically important barbituric acids have been prepared. Melting points, infrared spectra, and x-ray powder-diffraction patterns of the purified compounds are presented. Infrared evidence is used to discuss the position of the linkage between the xanthyl and barbiturate portions of the derivatives. The experimental data should prove of particular value for the microchemical identification of barbiturates.

DONOR ACCEPTOR REACTIONS OF TITANIUM TETRACHLORIDE WITH FORMAMIDE AND N,N-DIMETHYL FORMAMIDE

1958 ◽  
Vol 36 (11) ◽  
pp. 1461-1466 ◽  
Author(s):  
Jacques Archambault ◽  
Roland Rivest
Keyword(s):  
Infrared Spectra ◽  
Titanium Tetrachloride ◽  
Dimethyl Formamide ◽  
Positive Shift ◽  
Negative Shift ◽  
Structural Formulas ◽  
Donor Acceptor

Co-ordination complexes of titanium tetrachloride with formamide and N,N-dimethyl formamide have been prepared. All the complexes found are explained through a co-ordination number of 6 for titanium (IV).The infrared spectra of these compounds were measured; a negative shift observed for the carbonyl frequency and a positive shift observed for what is thought to be the C—N frequency are explained by a co-ordination through the oxygen of these molecules. Structural formulas are proposed for the compounds obtained.

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