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 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.

Organobismuth compounds. I. Studies on triphenylbismuth(V) derivatives, Ph3BiX2

1970 ◽  
Vol 48 (16) ◽  
pp. 2488-2493 ◽  
Author(s):  
R. G. Goel ◽  
H. S. Prasad
Keyword(s):  
Molecular Weight ◽  
Infrared Spectra ◽  
Molecular Species ◽  
Structural Features ◽  
Molecular Weights ◽  
Electrical Conductances ◽  
Conductance Data ◽  
Chemical Constitution ◽  
Derivatives Of ◽  
Coordinate Structures

Triphenylbismuth(V) acid derivatives of the type, Ph3BiX2, where X = halide, nitrate, cyanate, acetate, haloacetate, or cyanoacetate have been prepared. Infrared spectra (4000 to 200 cm−1 region), electrical conductances, and molecular weights of these compounds have been studied to elucidate their structural features and chemical constitution. The molecular weight and conductance data show that these compounds behave as molecular species in benzene or nitromethane. The infrared spectroscopic results also indicate non-ionic five-coordinate structures. Bi—X stretching frequencies have been assigned for the difluoride, dichloride, dinitrate, dicyanate, and diacetate. These frequencies occur in the region 410–240 cm−1.

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.

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.

Thio derivatives of β-diketones and their metal chelates. VIII. Adducts of metal chelates of fluorinated monothio-β-diketones

1968 ◽  
Vol 21 (1) ◽  
pp. 103 ◽  
Author(s):  
RKY Ho ◽  
SE Livingstone ◽  
TN Lockyer
Keyword(s):  
Molecular Weight ◽  
Metal Complexes ◽  
Infrared Spectra ◽  
Metal Chelates ◽  
Spectral Measurements ◽  
Nitrobenzene Solution ◽  
Nickel Zinc ◽  
Derivatives Of ◽  
Infrared Data ◽  
Palladium Platinum

Complexes of l,l,l-trifluoro-4-mercapto-4-phenylbut-3-en-2-one, PhC(SH)= CHCOCF3, with cobalt(111), nicke1(11), palladium(11), platinum(11), copper(11), zinc(11), cadmium(11), and mercury(11) have been prepared and characterized. Their infrared spectra and the spectra of metal complexes of two other fluorinated monothio-β-diketones are discussed. Adducts of nickel (11) palladium(11), platinum(11), zinc(11), cadmium(11), mercury(11), and lead(11) complexes of the fluorinated monothio-β-diketones, RC(SH)=CHCOCF3 (R = Ph, α-thienyl, or Me), with pyridine, α-picoline, γ-picoline, 2,2'-bipyridyl, 1,l0-phenanthroline, 2,9-dimethyl-1,l0-phenanthroline, 2,2',2"-terpyridyl, or triphenylphosphine are described. Molecular weight and visible spectral measurements on PdL2(PPh3)2 (L = C4H3SC(SH)=CHCOCF3) show that in nitro- benzene and toluene solution one phosphine moiety is lost. Similarly, ZnL2 pic2 (pic = α- or γ-picoline) loses one molecule of picoline in nitrobenzene solution. The infrared data indicate that in the adducts nickel, zinc, and probably cadmium are six-coordinate and palladium, platinum, mercury, and lead are four-coordinate, while zinc is five-coordinate in the mono-adducts ZnL2 pic.

Infrared Spectra of Some Chloro Derivatives of s-Triazine

1966 ◽  
Vol 20 (3) ◽  
pp. 159-160 ◽  
Author(s):  
T. S. Herman
Keyword(s):  
Infrared Spectra ◽  
Triazine Ring ◽  
Chlorine Atoms ◽  
Vibrational Assignments ◽  
Fundamental Frequencies ◽  
Bending Mode ◽  
Chloro Derivatives ◽  
Derivatives Of

The effects of chlorine atoms on the fundamental frequencies of the s-triazine ring are discussed and the vibrational assignments in the region 1600–700 cm−1 are extended. The variation in the position of the C3N3-ring bending mode in the region near 810 cm−1 is discussed.

Infrared spectra of some derivatives of unsaturated phosphinic acids

1961 ◽  
Vol 10 (1) ◽  
pp. 62-66 ◽  
Author(s):  
N. A. Slovokhotova ◽  
K. N. Anisimov ◽  
G. M. Kunitskaya ◽  
N. E. Kolobova
Keyword(s):  
Infrared Spectra ◽  
Phosphinic Acids ◽  
Derivatives Of

Infrared Spectra in Identification of Derivatives of Cyclopropane

1952 ◽  
Vol 24 (4) ◽  
pp. 623-625 ◽  
Author(s):  
S. E. Wiberley ◽  
S. C. Bunce
Keyword(s):  
Infrared Spectra ◽  
Derivatives Of

scholarly journals Crystal structures of four dimeric manganese(II) bromide coordination complexes with various derivatives of pyridine N-oxide

2019 ◽  
Vol 75 (8) ◽  
pp. 1284-1290
Author(s):  
Sheridan Lynch ◽  
Genevieve Lynch ◽  
Will E. Lynch ◽  
Clifford W. Padgett
Keyword(s):  
Hydrogen Bonding ◽  
Solvent Molecule ◽  
Bound Water ◽  
Manganese Atom ◽  
Coordination Complexes ◽  
Water Molecules ◽  
Inversion Center ◽  
Dimeric Complex ◽  
Bromide Ions ◽  
Derivatives Of

Four manganese(II) bromide coordination complexes have been prepared with four pyridine N-oxides, viz. pyridine N-oxide (PNO), 2-methylpyridine N-oxide (2MePNO), 3-methylpyridine N-oxide (3MePNO), and 4-methylpyridine N-oxide (4MePNO). The compounds are bis(μ-pyridine N-oxide)bis[aquadibromido(pyridine N-oxide)manganese(II)], [Mn2Br4(C5H5NO)4(H2O)2] (I), bis(μ-2-methylpyridine N-oxide)bis[diaquadibromidomanganese(II)]–2-methylpyridine N-oxide (1/2), [Mn2Br4(C6H7NO)2(H2O)4]·2C6H7NO (II), bis(μ-3-methylpyridine N-oxide)bis[aquadibromido(3-methylpyridine N-oxide)manganese(II)], [Mn2Br4(C6H7NO)4(H2O)2] (III), and bis(μ-4-methylpyridine N-oxide)bis[dibromidomethanol(4-methylpyridine N-oxide)manganese(II)], [Mn2Br4(C6H7NO)4(CH3OH)2] (IV). All the compounds have one unique MnII atom and form a dimeric complex that contains two MnII atoms related by a crystallographic inversion center. Pseudo-octahedral six-coordinate manganese(II) centers are found in all four compounds. All four compounds form dimers of Mn atoms bridged by the oxygen atom of the PNO ligand. Compounds I, II and III exhibit a bound water of solvation, whereas compound IV contains a bound methanol molecule of solvation. Compounds I, III and IV exhibit the same arrangement of molecules around each manganese atom, ligated by two bromide ions, oxygen atoms of two PNO ligands and one solvent molecule, whereas in compound II each manganese atom is ligated by two bromide ions, one O atom of a PNO ligand and two water molecules with a second PNO molecule interacting with the complex via hydrogen bonding through the bound water molecules. All of the compounds form extended hydrogen-bonding networks, and compounds I, II, and IV exhibit offset π-stacking between PNO ligands of neighboring dimers.

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