Experimental Test of the Theory of Carbon Chemical Shifts in Conjugated Molecules

1967 ◽  
Vol 46 (11) ◽  
pp. 4545-4546 ◽  
Author(s):  
H. L. Retcofsky ◽  
J. M. Hoffman ◽  
R. A. Friedel
Keyword(s):  
Experimental Test ◽  
Chemical Shifts ◽  
Conjugated Molecules

Core electron chemical shifts in conjugated molecules and polymers

1995 ◽  
Vol 103 (13) ◽  
pp. 5848-5859 ◽  
Author(s):  
Faris Gel’mukhanov ◽  
Hans Ågren
Keyword(s):  
Chemical Shifts ◽  
Core Electron ◽  
Conjugated Molecules

The calculation of chemical shifts in conjugated molecules

1971 ◽  
Vol 20 (6) ◽  
pp. 1073-1080 ◽  
Author(s):  
A.T. Amos ◽  
H.G. Ff. Roberts
Keyword(s):  
Chemical Shifts ◽  
Conjugated Molecules

The calculation of chemical shifts in conjugated molecules

1971 ◽  
Vol 20 (6) ◽  
pp. 1089-1098 ◽  
Author(s):  
H.G.Ff. Roberts ◽  
A.T. Amos
Keyword(s):  
Chemical Shifts ◽  
Conjugated Molecules

The calculation of chemical shifts in conjugated molecules

1971 ◽  
Vol 20 (6) ◽  
pp. 1081-1087 ◽  
Author(s):  
H.G.Ff. Roberts ◽  
A.T. Amos
Keyword(s):  
Chemical Shifts ◽  
Conjugated Molecules

The alternation of bond lengths in large conjugated molecules. III. The cyclic polyenes C 18 H 18 , C 24 H 24 and C 30 H 30

1960 ◽  
Vol 257 (1291) ◽  
pp. 445-456 ◽  
Keyword(s):  
Theoretical Study ◽  
Chemical Shifts ◽  
Ultra Violet ◽  
Conjugated Molecules ◽  
Bond Lengths ◽  
Bond Alternation ◽  
Cyclic Polyenes ◽  
C 30 ◽  
Proton Chemical Shifts ◽  
H 30

A theoretical study of the observed visible and ultra-violet spectra of C 18 H 18 , C 24 H 24 and C 30 H 30 indicates strongly that in these molecules the C—C bonds alternate in length. It is shown, furthermore, that the diamagnetic anisotropies and proton chemical shifts should indicate very sensitively the extent of bond alternation; as yet no measurements on these properties are available.

Microstructure and reactivity of small metal particles: The role of Ce additives

1992 ◽  
Vol 50 (1) ◽  
pp. 318-319
Author(s):  
L.D. Schmidt ◽  
K. R. Krause ◽  
J. M. Schwartz ◽  
X. Chu
Keyword(s):  
Atmospheric Pressure ◽  
Noble Metals ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
Chemical Shifts ◽  
Catalytic Converter ◽  
Structural Evolution ◽  
Single Particles ◽  
Small Metal Particles

The evolution of microstructures of 10- to 100-Å diameter particles of Rh and Pt on SiO2 and Al2O3 following treatment in reducing, oxidizing, and reacting conditions have been characterized by TEM. We are able to transfer particles repeatedly between microscope and a reactor furnace so that the structural evolution of single particles can be examined following treatments in gases at atmospheric pressure. We are especially interested in the role of Ce additives on noble metals such as Pt and Rh. These systems are crucial in the automotive catalytic converter, and rare earths can significantly modify catalytic properties in many reactions. In particular, we are concerned with the oxidation state of Ce and its role in formation of mixed oxides with metals or with the support. For this we employ EELS in TEM, a technique uniquely suited to detect chemical shifts with ∼30Å resolution.

The impact of expectations and satisfaction on the initiation and maintenance of smoking cessation: An experimental test.

2008 ◽  
Vol 27 (3, Suppl) ◽  
pp. S197-S206 ◽  
Author(s):  
Andrew W. Hertel ◽  
Emily A. Finch ◽  
Kristina M. Kelly ◽  
Christie King ◽  
Harry Lando ◽  
...  
Keyword(s):  
Smoking Cessation ◽  
Experimental Test ◽  
The Impact
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