2-Aminothiazole, acetylaminothiazole, dimethylhydantoin and thiohydantoin complexes of tin(IV) and titanium(IV) halides

1974 ◽  
Vol 27 (8) ◽  
pp. 1827 ◽  
Author(s):  
PP Singh ◽  
UP Shukla
Keyword(s):  
Infrared Spectra ◽  
Donor Site ◽  
Far Infrared ◽  
Carbonyl Oxygen ◽  
Spectral Studies ◽  
Infrared Spectral ◽  
Far Infrared Spectra

Complexes of the type MX4L2 (M = Sn, Ti; X = Cl, Br, I; L = dimethylhydantoin, thiohydantoin, 2-aminothiazole and 2-acetylaminothiazole) have been prepared and characterized. Infrared spectral studies indicate exocyclic nitrogen of 2:aminothiazole and carbonyl oxygen of all other ligands as the donor site. Far-infrared spectra suggest that dimethylhydantoin and 2-acetylaminothiazole complexes are trans, and 2-aminothiazole and thiohydantoin complexes are cis octahedral.

scholarly journals Removal of Etalon Features in the Far-Infrared–Terahertz Transmittance Spectra of Thin Polymer Films

2020 ◽  
Vol 74 (12) ◽  
pp. 1530-1539
Author(s):  
Ulrich Schade ◽  
Dawei Cao ◽  
Ljiljana Puskar ◽  
Eglof Ritter ◽  
Jörg Beckmann
Keyword(s):  
Infrared Spectra ◽  
Polymer Films ◽  
Far Infrared ◽  
Thin Polymer Films ◽  
Model Calculations ◽  
Mid Infrared ◽  
Thin Polymer ◽  
Infrared Spectral ◽  
Total Transmittance ◽  
Far Infrared Spectra

Etalon features in infrared spectra of stratified samples, their influence on the interpretation, and methods to circumvent their presence in infrared spectra have been in discussion for decades. This paper focuses on the application of a method originally developed to remove interference fringes in the mid-infrared spectra for far-infrared Fourier transform spectroscopy on thin polymer films. We show that the total transmittance reflectance technique, commonly used for mid-infrared, also works successfully in the far-infrared spectral range where other approaches fail. Experimental spectra obtained by such technique are supported by model calculations and reveal the possibility and limits to obtain almost undisturbed far-infrared spectra which are suitable to determine low-energy vibrations of ionomer salts under certain sample conditions.

Structure of donor-acceptor complexes. X. Complexes of cyanoacetamide with Lewis acids

1969 ◽  
Vol 22 (7) ◽  
pp. 1381 ◽  
Author(s):  
RC Paul ◽  
SL Chadha
Keyword(s):  
Oxygen Atom ◽  
Spectral Data ◽  
Infrared Spectra ◽  
Lewis Acids ◽  
Far Infrared ◽  
Carbonyl Oxygen ◽  
Aluminium Chloride ◽  
Infrared Spectral ◽  
Donor Acceptor ◽  
Ionic Nature

Complexes of cyanoacetamide with aluminium chloride and bromide, anti- mony(V) chloride, boron(III) bromide, tin(IV) chloride and bromide, titanium(IV) chloride and bromide, and zirconium(IV) chloride have been prepared. The molar conductances of the complexes in nitrobenzene indicate their non-ionic nature. The infrared spectra indicate bonding of the metal halides to the carbonyl oxygen atom of the ligand. Metal- to-oxygen bonding also gets support from the far-infrared spectral data.

Cobalt(II) and Nickel(II) Complexes with Nitrogen, Sulfur, and Selenium Containing Heterocyclic Ligands

1974 ◽  
Vol 52 (11) ◽  
pp. 2021-2028 ◽  
Author(s):  
C. Preti ◽  
G. Tosi ◽  
D. De Filippo ◽  
G. Verani
Keyword(s):  
Magnetic Susceptibility ◽  
Infrared Spectra ◽  
Far Infrared ◽  
Spectral Studies ◽  
Heterocyclic Ligands ◽  
Tetrahedral Symmetry ◽  
Halide Complexes ◽  
Probable Site ◽  
Derivatives Of ◽  
Far Infrared Spectra

Cobalt(II) and nickel(II) halide complexes with thiomorpholin-3-thione and thiazolidine-2-selenone have been prepared. Infrared and far infrared spectra, electronic spectral studies, and magnetic susceptibility measurements indicate that the cobalt derivatives are tetrahedral in structure, nickel chloro- and bromo-thiomorpholin-3-thione derivatives are octahedral while [Nits2I2] and all nickel thiazolidine-2-selenone complexes have a pseudo-tetrahedral symmetry. The probable site of bonding in the ligands is nitrogen in all the complexes studied here, except the nickel derivatives of thiazolidine-2-selenone. These results are confirmed by n.m.r. measurements. Spectroscopic parameters for the complexes have been calculated and compared against similar chromophores containing MN2X2 and MS2X2 chromophores.

Far-infrared spectra of polycrystallineBa2YCu3O9−δ

1987 ◽  
Vol 36 (1) ◽  
pp. 846-849 ◽  
Author(s):  
G. A. Thomas ◽  
H. K. Ng ◽  
A. J. Millis ◽  
R. N. Bhatt ◽  
R. J. Cava ◽  
...  
Keyword(s):  
Infrared Spectra ◽  
Far Infrared ◽  
Far Infrared Spectra
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