Electronic Spectra of Organic Molecules

9-9 ELECTRONIC SPECTRA OF ORGANIC MOLECULES 9-9A General Characteristics 

A year after Herschel discovered infrared radiation, Johann Ritter discovered radiation beyond the violet end of the visible spectrum. This radiation came to be known as ultraviolet and soon was recognized as being especially effective in causing chemical reactions. 

Some Electronic Transitions of Simple Organic Molecules 

Compound Type maxi niTI c a cmax Solvent6 

6lt is necessary to specify the solvent because Xmax and emax vary somewhat with solvent. These assignments are not certain. 

---

Murrell, J.N. "The Theory of the Electronic Spectra of organic molecules" John Wiley New-York, 1963... 

Murrell, J. N. The theory of the electronic spectra of organic molecules. New York ... 

B. O. Roos, M. Fulscher, P.A. Malmqvist, M. Merchan and L. Serrano-Andres Theoretical Studies ofthe Electronic Spectra of Organic Molecules., in S.R. Langhoff (ed.) Quantum Mechanical Electronic Stmcture Calculations with Chemical Accuracy., Kluwer Academic Publishers, Dordrecht, (1995). 

B-63MI20100 J. N. Murrell The Theory of the Electronic Spectra of Organic Molecules ,... 

The observations of the effect of hydrogen bond formation on the electronic spectra of organic molecules represent experimental evidence for the polarization, i.e. the electron-shifts in the ground state, arising from true hydrogen bond formation. The difficulty to separate this effect from that due to the normal dielectric properties of solvents can be overcome in the case of phenolic substances by a comparison with the corresponding methyl ethers. 

Murrell, J. N., The Theory of the Electronic Spectra of Organic Molecules, Wiley, New York, 1963. Good discussions of the applications of HMO, FE MO, and Pariser-Parr-Pople theory to organic compounds. 

A Electronic Spectra of Organic Molecules. General Characteristics... 

Roos BO, Fiilscher MP, Malmqvist P-A, Merchan M, Serrano-Andres L (1996) Theoretical Studies of Electronic Spectra of Organic Molecules. In Langhoff SR (ed) Quantum Mechanical Electronic Structure Calculations with Chemical Accuracy, Kluwer, Dordrecht, p 357. 

Murrell, J.N. (1963), The Theory of Electronic Spectra of Organic Molecules Methuen Co. London. 

Instead of discussing the electronic spectra of organic molecules empirically in terms of chromophores and auxochromes, one is now in a position to systematize the spectral properties of molecules in this region according to the types of valence electrons they contain, Electrons forming single bonds... 

---