Preparation and infrared spectra of some ammine complexes of ruthenium(II) and ruthenium(III)

1967 ◽  
Vol 45 (12) ◽  
pp. 1337-1341 ◽  
Author(s):  
A. D. Allen ◽  
C. V. Senoff
Keyword(s):  
Solid State ◽  
Infrared Spectra ◽  
Absorption Bands ◽  
Ammine Complexes ◽  
Stretching Vibrations

The infrared spectra of the complexes [Ru(NH3)6]X2 and [Ru(NH3)6]X3, where X = Cl−, Br−, I−, BF4− and [Ru(NH3)5X]X2, where X = Cl−, Br− and I−, have been measured in the solid state between 4 000 – 250 cm−1. Assignments have been made for the observed absorption bands. The metal–nitrogen stretching vibrations were observed between 485–424 cm−1 for the ruthenium(III) complexes but were not observed for the ruthenium(II) complexes in this region.

The infrared spectra of theobromine salts

1967 ◽  
Vol 45 (23) ◽  
pp. 2899-2902 ◽  
Author(s):  
Denys Cook ◽  
Zephyr R. Regnier
Keyword(s):  
Hydrogen Bond ◽  
Nitrogen Atom ◽  
Infrared Spectra ◽  
Imidazole Ring ◽  
Free Base ◽  
Absorption Bands ◽  
Out Of Plane ◽  
Stretching Vibrations ◽  
Deformation Modes ◽  
Infrared Absorption Bands

From the infrared spectra of theobromine salts it is concluded that the salts are probably arranged in hydrogen-bonded centrosymmetric pairs involving [Formula: see text] interactions. [Formula: see text] anion− hydrogen bonds are formed by protonation of the free nitrogen atom (N9) in the imidazole ring. Infrared absorption bands arising from the former hydrogen bond constantly appear near 3 000 cm−1, whereas those from the latter shift from 2 580 to 3 300 cm−1, depending on the anion. In-plane NH and N+H deformation modes give bands near 1 485 and 1 160 cm−1, respectively. Out-of-plane NH modes have been located, but precise assignments are not possible.The assignments for some other bands which show deuteration shifts are detailed, and the carbonyl stretching vibrations which increase in frequency on protonation of the free base are identified.

Synthetic, Infrared And Nmr (1H And 13C) Spectral Studies Of N-(Substituted Phenyl)-Methanesulphonamides

2004 ◽  
Vol 59 (7-8) ◽  
pp. 491-500 ◽  
Author(s):  
K. L. Jayalakshmi ◽  
B. Thimme Gowda
Keyword(s):  
Solid State ◽  
Infrared Spectra ◽  
Phenyl Ring ◽  
Chemical Shifts ◽  
Aromatic Proton ◽  
Spectral Studies ◽  
Substituted Anilines ◽  
Substituted Benzenes ◽  
Stretching Vibrations ◽  
Electron Donating Groups

Twenty two N-(substituted phenyl)-methanesulphonamides of the general formula, CH3SO2NHR, where R = 4-XC6H4(X = H, CH3, F, Cl, Br or NO2), i-XC6H4(X=CH3, Cl orNO2 and i=2 or 3) and i, j-X2C6H3(i, j-X2 = 2,3-(CH3)2, 2,4-(CH3)2, 2,5-(CH3)2, 2,6-(CH3)2, 3,5-(CH3)2, 2,3-Cl2, 2,4- Cl2, 2,5-Cl2, 2,6-Cl2 or 3,4-Cl2) were prepared, characterized and their infrared spectra in the solid state and the NMR (1H and 13C) spectra in solution studied. The N-H stretching vibrations absorb in the range, 3298 - 3232 cm−1. Asymmetric and symmetric SO2 stretching vibrations appear as strong absorptions in the ranges, 1331 - 1317 cm−1 and 1157 - 1139 cm−1, respectively. The sulphonamides exhibit S-N stretching vibrations in the range, 926 - 833 cm−1. The effect of substitution in the phenyl ring in terms of electron withdrawing and electron donating groups is non-systematic. The 1H and 13C chemical shifts of N-(substituted phenyl)-methanesulphonamides are assigned to various protons and carbons of the compounds. Further, incremental shifts of the ring protons and carbons due to CH3SO2- and CH3SO2NH- groups in the N-(phenyl)-methanesulphonamide are computed and used to calculate the 1H and 13C chemical shifts of various protons and carbons of N-(substituted phenyl)-methanesulphonamides, by adding substituent contributions to the corresponding aromatic proton or carbon chemical shifts of either aniline, substituted anilines, benzene or substituted benzenes, in different ways, as per the principle of substituent addition. The computed values by different procedures agree well with each other and with the experimental chemical shifts. The correlation of these incremental shifts with the Hammett substituent parameters is poor.

Infrared spectra of compounds with the methoxymethyl protecting group

1986 ◽  
Vol 51 (1) ◽  
pp. 90-100 ◽  
Author(s):  
Soňa Vašíčková ◽  
Vladimír Pouzar ◽  
Ivan Černý ◽  
Pavel Drašar ◽  
Miroslav Havel
Keyword(s):  
Infrared Spectra ◽  
Strong Absorption ◽  
Protecting Group ◽  
Absorption Bands ◽  
Stretching Vibrations

Infrared spectra of a series of compounds containing the CH3OCH2O- (MOM-O-) group have been studied. All the spectra exhibit three characteristic strong absorption bands due to coupled stretching vibrations of C-O-C-O-C grouping in the region 1 200 - 1 000 cm-1.

Correlation of Mössbauer Quadrupole Splitting (ΔΕQ) and Infrared Cyanide Frequency Separation in Alkali Metal Ferricyanides

1975 ◽  
Vol 30 (1-2) ◽  
pp. 96-98 ◽  
Author(s):  
A. N. Garg
Keyword(s):  
Solid State ◽  
Alkali Metal ◽  
Quadrupole Splitting ◽  
Infrared Spectra ◽  
Room Temperature ◽  
Frequency Separation ◽  
Hydrogen Atoms ◽  
Stretching Vibrations ◽  
Hydrogen Bonded

Mössbauer and infrared spectra of the alkali metal ferricyanides M3I [Fe(CN)6] · nH2O, where MI = H, Li and Na were studied at room temperature. All the three compounds displayed a doublet with small quadrupole splitting (ΔΕQ). Infrared spectra of these compounds in solid state gave two frequencies for C=N stretching vibrations with their separation (Δv) in increasing order which was found to be linearly correlated with ΔE Q. A plausible explanation has been given in terms of the interaction of Li+ and Na+ cations with the CN- ligands of octahedrally symmetric ferricyanide anion [Fe(CN)6]3- similar to that of hydrogen atoms which are hydrogen bonded in H3Fe(CN)6.

Organobismuth Compounds. III. Preparation and Infrared Spectra of Triphenylbismuth(V) Derivatives of Dibasic Acids

1971 ◽  
Vol 49 (15) ◽  
pp. 2529-2532 ◽  
Author(s):  
R. G. Goel ◽  
H. S. Prasad
Keyword(s):  
Solid State ◽  
Infrared Spectra ◽  
Frequency Region ◽  
The Other ◽  
Stretching Vibrations ◽  
Derivatives Of ◽  
Polymeric Structures

Triphenylbismuth carbonate, oxalate, sulfate, selenate, and chromate have been prepared and their solid state infrared (i.r.) spectra have been studied in the frequency region 4000 to 200 cm−1. The i.r. spectroscopic results indicate that, like the corresponding trimethyl- and triphenylantimony(V) derivatives, these compounds also have non-ionic polymeric structures containing bridging anion groups and five co-ordinate bismuth. The i.r. frequencies associated with the bismuth–anion stretching vibrations appear to occur at 300 cm−1 for the carbonate and below 300 cm−1 for the other compounds.

Infrared spectra of lignin model compounds and of lignins from Eucalyptus regnans

1966 ◽  
Vol 19 (12) ◽  
pp. 2285 ◽  
Author(s):  
AJ Michell
Keyword(s):  
Solid State ◽  
Infrared Spectra ◽  
Carboxyl Groups ◽  
Hydroxyl Groups ◽  
Model Compounds ◽  
Eucalyptus Regnans ◽  
Lignin Model Compounds ◽  
Solvent Dependence ◽  
Lignin Model ◽  
Stretching Vibrations

Infrared spectra in the O-H and C=O stretching regions of lignin model compounds and of lignins isolated in various ways from Eucalyptus regnans F. Muell. have been obtained for samples both in the solid state and in solution. The effects of solvents on the stretching vibrations of free and intramolecularly bonded hydroxyl groups have been examined for a number of the model compounds, including some in which the groups are subject to steric hindrance. The results have been used to interpret the O-H stretching frequencies of the lignins in the same solvents. In the lignin macromolecules all hydroxyl groups appear to be involved in hydrogen bonds, and the phenolic groups are sterically hindered.��� Different solvent effects have also been observed in model compounds between the C=O stretching frequencies of carboxyl groups and those of aldehyde, ketone, and ester groups. The solvent dependence of the 1665 cm-1 band in the lignin spectra supports its assignment to a conjugated aldehyde or ketone group, but the dependence of the 1725 cm-1 band suggests that both carboxyl and carbony1 groups may contribute to the band envelope.

scholarly journals Infrared, 1H and 13C NMR Spectra of N,N-Dichloroarylsulphonamides, 4-X-C6H4SO2NCl2 (X = H, CH3, C2H5, F, Cl or Br) and i-X, j-YC6H3SO2NCl2 (i-X, j-Y = 2,3-(CH3)2, 2,4-(CH3)2, 2,5-(CH3)2, 2-CH3, 4-Cl, 2-CH3, 5-Cl, 3-CH3, 4-Cl, 2,4-Cl2 or 3,4-Cl2)

2003 ◽  
Vol 58 (9-10) ◽  
pp. 563-568
Author(s):  
B. Thimme Gowda ◽  
K. Jyothi ◽  
N. Damodara
Keyword(s):  
Infrared Spectra ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Empirical Correlations ◽  
Absorption Bands ◽  
1H And 13C Nmr ◽  
Modes Of Vibration ◽  
Stretching Vibrations ◽  
Electron Donating Groups ◽  
Infrared Absorption Bands

Several mono- and di-substituted N,N-dichloroarylsulphonamides of the configuration, 4-XC6H4SO2NCl2 (where X = H, CH3, C2H5, F, Cl or Br) and i-X, j-YC6H3SO2NCl2 (where i- X, j-Y = 2,3-(CH3)2, 2,4-(CH3)2, 2,5-(CH3)2, 2-CH3,4-Cl, 2-CH3,5-Cl, 3-CH3,4-Cl, 2,4-Cl2 or 3,4-Cl2), respectively, were prepared, characterised and their infrared spectra in the solid state and NMR spectra in solution state were measured and correlated. Comparison of the infrared spectra of the N,N-dichloroarylsulphonamides with the corresponding arylsulphonamides and Nchloroarylsulphonamides revealed that the infrared absorption bands in the ranges, 790 - 735 cm−1 and 595 - 546 cm−1 are due to N-Cl asymmetric and symmetric stretching vibrations, respectively, and that the effect of ring substitution on the N-Cl frequencies is not consistent. The frequencies in the ranges 1384 - 1333 cm−1 and 1181 - 1143 cm−1 are, respectively, assigned to S=O asymmetric and symmetric modes of vibration. The effect of substitution in the phenyl ring in terms of electron withdrawing and electron donating groups is non-systematic. Since the chemical shift depends on the electron density around the nucleus, empirical correlations relating the chemical shifts to the structures have been considered. The chemical shifts of aromatic protons and carbons in all the N,Ndichloroarylsulphonamides have been calculated by adding substituent contributions to the shift of benzene. Considering the approximation made, the agreement between the calculated and experimental chemical shifts is good.

Infrared and NMR (1H & 13C) Spectra of Sodium Salts of N-Bromo-Mono and Di-Substituted-Benzenesulphonamides

2003 ◽  
Vol 58 (5-6) ◽  
pp. 351-356 ◽  
Author(s):  
B. Thimme Gowda ◽  
K. M. Usha
Keyword(s):  
Solid State ◽  
Infrared Spectra ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Vibrational Frequencies ◽  
Sodium Salts ◽  
Stretching Vibrations

Fifteen sodium salts of mono and di-substituted N-bromobenzene-sulphonamides of the configuration, 4-X-C6H4SO2NaNBr (where X = H; CH3; C2H5; F; Cl; Br; or NO2) and i-X,j- YC6H3SO2NaNBr (where i-X, j-Y = 2,3-(CH3)2; 2,4-(CH3)2; 2,5-(CH3)2; 2-CH3,4-Cl; 2-CH3,5-Cl; 3-CH3,4-Cl; 2,4-Cl2 or 3,4-Cl2) are prepared and characterised by measuring their infrared spectra in the solid state and NMR spectra in solution. The N-Br vibrational frequencies, νN−Br of N-bromoarylsulphonamides vary in the range, 945 - 925 cm−1, while the N-Cl vibrational frequencies, νN−Cl, are observed in the range 950 - 927 cm−1 for the corresponding N-chloroarylsulphonamides. Asymmetric and symmetric SO2 stretching vibrations appear in the ranges, 1391 - 1352 cm−1 and 1148 - 1131 cm−1 for the monosubstituted N-bromoarylsulphonamides, while for the disubstituted N-bromocompounds they absorb in the ranges 1391 - 1331 cm−1 and 1149 - 1121 cm−1, respectively. The chemical shifts of aromatic protons and carbon-13 in all the N-bromoarylsulphonamides have been calculated by adding substituent contributions to the shift of benzene and compared with the observed values. The agreement between the calculated and experimental chemical shifts for different protons or carbon-13 is quite good.

Vibrational spectra of cyclopentadienyltrimethylplatinum(IV)

1971 ◽  
Vol 24 (5) ◽  
pp. 911 ◽  
Author(s):  
JR Hall ◽  
BE Smith
Keyword(s):  
Solid State ◽  
Spectral Data ◽  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Local Symmetry ◽  
Stretching Vibrations ◽  
Polarized Raman

The Raman spectra of cyclopentadienyltrimethylplatinum(IV) in the solid state and solution have been recorded and interpreted in conjunction with the corresponding infrared spectra over the range 4000-30 cm-1. Assignments have been made on the basis of local symmetry. Polarized Raman lines at 561 and 263 cm-1 have been assigned to symmetric Pt-CH3 stretching and Pt-cp stretching vibrations respectively. The spectral data are consistent with a pentahapto π-bonded cp ring.

Coordination complexes of gallium(III) and indium(III) halides. II. Far-infrared spectra of gallium(III) halide complexes with triarylphosphines

1967 ◽  
Vol 45 (24) ◽  
pp. 3187-3192 ◽  
Author(s):  
Arthur J. Carty
Keyword(s):  
Solid State ◽  
Infrared Spectra ◽  
Far Infrared ◽  
Coordination Complexes ◽  
Halide Complexes ◽  
Stretching Vibrations ◽  
Far Infrared Spectra

Infrared spectra of some triarylphosphine and diphosphine complexes of gallium (III) chloride, bromide, and iodide have been recorded in the range 600–200 cm−1 and assignments of gallium–halogen stretching vibrations made. The number and frequencies of the ν (Ga–X) vibrations are consistent with monomeric structures for the triarylphosphine complexes in the solid state. Possible structures for the diphosphine complexes are discussed.

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