Matrix photoionization of methyl halides. Ultraviolet spectra of the parent cations and infrared evidence for intramolecular hydrogen-bonded parent anions in solid argon

1979 ◽  
Vol 101 (24) ◽  
pp. 7158-7161 ◽  
Author(s):  
Lester Andrews ◽  
J. Houston Miller ◽  
Eleanor S. Prochaska
Keyword(s):  
Methyl Halides ◽  
Ultraviolet Spectra ◽  
Intramolecular Hydrogen ◽  
Solid Argon ◽  
Hydrogen Bonded

Application of photoelectron spectroscopy to intramolecularly hydrogen-bonded systems. Part II. On the n–π* blue shift of carbonyl-containing molecules

1976 ◽  
Vol 54 (20) ◽  
pp. 3203-3205 ◽  
Author(s):  
R. S. Brown
Keyword(s):  
Hydrogen Bond ◽  
Intramolecular Hydrogen Bond ◽  
Photoelectron Spectroscopy ◽  
Blue Shift ◽  
Photoelectron Spectra ◽  
Ultraviolet Spectra ◽  
Hydrogen Bonded Systems ◽  
Intramolecular Hydrogen ◽  
Hydrogen Bonded

The photoelectron spectra of 2-hydroxycyclohexanone and 2-methoxycyclohexanone, show that the ionization assigned to removal of the carbonyl n-electron is 0.6 eV higher in the former, presumably due to the intramolecular hydrogen bond. The ultraviolet spectra of these molecules also exhibit a marked blue shift of the n → π* transition in the former of roughly 0.5 eV. A discussion of the observations includes consideration of the effect of the intramolecular hydrogen bond on the ground and excited or ion state.

Photoelectron studies on intramolecularly hydrogen-bonded systems. I. The photoelectron spectra of cis- and trans-2-aminocyclopentanol, and cis- and trans-2-(N,N-dimethylamino)cyclopentanol

1976 ◽  
Vol 54 (4) ◽  
pp. 642-646 ◽  
Author(s):  
R. S. Brown
Keyword(s):  
Hydrogen Bonding ◽  
Ionization Energy ◽  
Lone Pair ◽  
Intramolecular Hydrogen Bonding ◽  
Photoelectron Spectra ◽  
Hydrogen Bonded Systems ◽  
Intramolecular Hydrogen ◽  
Cis And Trans ◽  
Infrared Data ◽  
Hydrogen Bonded

The photoelectron spectra of cis- and trans-2-aminocyclopentanol and cis- and trans-2-(N,N,-dimethylamino)cyclopentanol have been recorded and interpreted. The cis isomers exhibit N lone pair ionizations at higher ionization energy, and O lone pair ionizations at lower ionization energy than their trans isomers.The results are most consistent with the existence and observation of intramolecular hydrogen-bonding in the cis isomers. Infrared data on these systems also show that the cis isomers exist in the intramolecularly hydrogen-bonded state.

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