ISSN:
0009-2940
Keywords:
Cerium(IV) bisporphyrinates
;
Monofunctionalized tetraarylporphyrins
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The synthesis of a cerium(IV) bisporphyrinate 1b starting from (p-hydroxyphenyl)tris(p-tolyl)porphyrin 2b is described. Derived from 2b by substitution of the phenolic OH group, the monofunctionalized tetraarylporphyrins 2c-f and their cerium(IV) sandwich complexes 1c-f were synthesized. The complexes are characterized by UV/Vis, IR, and 1H-NMR spectroscopy. 19F-NMR spectra of 1f show the presence of a vicinal and a transversal isomer due to the rigid squareantiprismatic coordination geometry of cerium(IV) bisporphyrinates. Variable-temperature 1H- and 19F-NMR spectra were recorded to investigate the rotational rigidity of the double-decker system. The spectra show that the vicinal and transversal isomers are stable up to 140°C, i.e. rotation of the two porphyrin macrocycles with respect to each other does not occur.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19941270402
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