ChemInform Abstract: THE CHEMISTRY OF PYRROLIC COMPOUNDS. XL. A NEW SYNTHESIS OF PROTOPORPHYRINS III AND XIII AND A PROTON NMR STUDY OF THE PREFERRED PATHWAY OF ELECTRON DELOCALIZATION IN THE PORPHYRIN MACROCYCLE

1978 ◽  
Vol 9 (28) ◽  
Author(s):  
P. S. CLEZY ◽  
C. J. R. FOOKES ◽  
S. STERNHELL
Keyword(s):  
Proton Nmr ◽  
Electron Delocalization ◽  
Porphyrin Macrocycle ◽  
Nmr Study ◽  
New Synthesis

The chemistry of pyrrolic compounds. XL. A new synthesis of protoporphyrins III and XIII and a 1H N.M.R. study of the preferred pathway of electron delocalization in the porphyrin macrocycle

1978 ◽  
Vol 31 (3) ◽  
pp. 639 ◽  
Author(s):  
PS Clezy ◽  
CJR Fookes ◽  
S Sternhell
Keyword(s):  
Double Bond ◽  
Bond Order ◽  
Oxidative Cyclization ◽  
Electron Delocalization ◽  
Coupling Constant ◽  
Proton Coupling ◽  
Porphyrin Macrocycle ◽  
New Synthesis

The synthesis of protoporphyrins III and XIII as the dimethyl esters has been completed by an oxidative cyclization of biladiene-ac intermediates. Protoporphyrin III has been converted into deuteroporphyrin III and measurements of the proton coupling constant in the allylic unit, CH3-C=C-H, of this latter porphyrin point to the double bond of this system having a significantly diminished bond order. This finding is in accord with the view that the π-electron delocalization pathway in the porphyrin macrocycle involves the periphery of the molecule.

Benzene confined in MCM-41 below its melting point : A proton NMR study

2000 ◽  
Vol 10 (PR7) ◽  
pp. Pr7-99-Pr7-102 ◽  
Author(s):  
G. Dosseh ◽  
D. Morineau ◽  
C. Alba-Simionesco
Keyword(s):  
Melting Point ◽  
Proton Nmr ◽  
Nmr Study ◽  
Mcm 41

ChemInform Abstract: PROTON NMR STUDY OF THE STRUCTURE OF SUBSTITUTED 3H,6H-6-SILA-3-AZAACEANTHRYLENES

1983 ◽  
Vol 14 (11) ◽  
Author(s):  
A. A. FOMICHEV ◽  
V. A. SVOREN' ◽  
N. F. SEPETOV ◽  
A. V. VARLAMOV ◽  
N. S. PROSTAKOV
Keyword(s):  
Proton Nmr ◽  
Nmr Study

A Proton NMR Study on the Structure of Water at Interfaces of Cationic Micelles. Effects of the Nature of the Surfactant Headgroup

Langmuir ◽  
1994 ◽  
Vol 10 (3) ◽  
pp. 653-657 ◽  
Author(s):  
Omar A. El Seoud ◽  
Andrei Blasko ◽  
Clifford A. Bunton
Keyword(s):  
Proton Nmr ◽  
Structure Of Water ◽  
Cationic Micelles ◽  
Nmr Study
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