scholarly journals The Electrostatic Effect of the Solvents on the Frequency Shifts and the Intensity Changes of the Infrared Absorption Spectra

1954 ◽  
Vol 27 (5) ◽  
pp. 295-297 ◽  
Author(s):  
Eizi Hirota
Keyword(s):  
Absorption Spectra ◽  
Infrared Absorption ◽  
Frequency Shifts ◽  
Electrostatic Effect ◽  
Intensity Changes ◽  
Infrared Absorption Spectra

The Infrared Absorption Spectra of Some Samarium Diketo-ester Complexes

1970 ◽  
Vol 25 (2) ◽  
pp. 139-141 ◽  
Author(s):  
S. P. Tandon ◽  
P. C. Mehta
Keyword(s):  
Coordination Number ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Relative Frequency ◽  
Methyl Acetoacetate ◽  
Frequency Shifts ◽  
Modes Of Vibration ◽  
Infrared Absorption Spectra ◽  
Stretching Vibrations ◽  
First Time

Infrared absorption spectra of some four- and five-coordinated (ethyl 1-methyl acetoacetate) complexes of trivalent samarium have been studied in the region 4000 - 250 cm-1 for the first time. About twenty bands in each chelate have been observed and assigned to different modes of vibration. A study of relative frequency shifts of CO stretching vibrations reveals that the metal-oxygen bonds in all the complexes are nearly of the same strength. The vibrational frequencies, with few exceptions, are found to be nearly independent of the coordination number of the metal.

3,5-Dialkyl Phenols and Their Allyl Substitution Products: Infrared Absorption Spectra and Interpretation of Characteristic Frequency Shifts

1970 ◽  
Vol 53 (2) ◽  
pp. 275-287
Author(s):  
J -Y T Chen ◽  
Nancy C Oates ◽  
David Firestone
Keyword(s):  
Absorption Spectra ◽  
Infrared Spectra ◽  
Infrared Absorption ◽  
Characteristic Frequency ◽  
Frequency Shifts ◽  
Mass Effects ◽  
Infrared Absorption Spectra ◽  
Absorption Frequencies ◽  
Allyl Substitution

Abstract The infrared spectra of five 3,5-dialkyl phenols, six 2-allyl-3,5-dialkyl phenols, and five 4-allyl-3,5-dialkyl phenols are presented. The characteristic infrared absorption frequencies are tabulated in correlation charts. The hyperconjugation and mass effects of substituent groups are discussed.

The Infrared Absorption Spectra of Some Samarium Chelates

1970 ◽  
Vol 25 (5) ◽  
pp. 472-475 ◽  
Author(s):  
S. P. Tandon ◽  
P. C. Mehta ◽  
R. N. Kapoor ◽  
S. N. Misra
Keyword(s):  
Absorption Spectra ◽  
Infrared Absorption ◽  
Relative Frequency ◽  
Vibration Modes ◽  
Frequency Shifts ◽  
Infrared Absorption Spectra

The infrared absorption of samarium (di-isopropoxy) mono dibenzoylmethide [Sm (ΟΡri) 2DBM] and samarium tris dibenzoylmethide [Sm(DBM)3] in the region 4000 - 250 cm-1 have been studied. About 25 bands in each chelate have been observed and assigned to different modes of vibrations. The number of metal-oxygen vibration modes of the chelates suggest Vh and D3 sym. metries for Sm (OPri) 2DBM and Sm (DBM) 3 respectively. The relative frequency shifts of CO and CC stretching modes indicate that the metal-oxygen bonding in Sm(DBM)3 is relatively stronger than in Sm (OPri) 2DBM.

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