1971
DOI: 10.1021/ja00738a021
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Inert carbon free radicals. I. Perchlorodiphenylmethyl and perchlorotriphenylmethyl radical series

Abstract: maléate (10%, 8% yield). The last two fractions were essentially pure exo ester, bp 123°(22 mm), m24d 1.4675 (lit.37 bp 109-110°( 18 mm)).

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Cited by 207 publications
(134 citation statements)
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“…The electronic absorption spectrum of 1 ( Figure 2) shows an intense band at 25 500 cm À1 , which is typical of perchlorinated benzene derivatives [26][27][28] and a weaker band at 24 900 cm À1 , which is assigned to methoxy-substituted triarylamine systems. [29] Furthermore, two weak absorption bands at 19 000 cm À1 and 17 500 cm À1 can be observed which are characteristic for perchlorinated triarylmethyl radical systems.…”
mentioning
confidence: 99%
“…The electronic absorption spectrum of 1 ( Figure 2) shows an intense band at 25 500 cm À1 , which is typical of perchlorinated benzene derivatives [26][27][28] and a weaker band at 24 900 cm À1 , which is assigned to methoxy-substituted triarylamine systems. [29] Furthermore, two weak absorption bands at 19 000 cm À1 and 17 500 cm À1 can be observed which are characteristic for perchlorinated triarylmethyl radical systems.…”
mentioning
confidence: 99%
“…[25] Des Weiteren kann man eine reversible Reduktion bei E 1/2 = À670 mV beobachten, die der Reduktion des KohlenstoffRadikalzentrums zum Carbanion entspricht. [24] Die große Differenz der Halbstufenpotentiale der beiden Redoxprozesse spiegelt die Nichtentartung der Redoxzentren wider, anders als bei den oben erwähnten Bis(triarylamin)-oder [26][27][28] und eine schwächere Bande bei 24 900 cm À1 , die dem Methoxy-substituierten Triarylamin-System zuzuordnen ist. [29] Des Weiteren können zwei schwache, für perchlorierte Triarylmethyl-Radikal-Systeme charakteristische Banden bei 19 000 cm À1 und 17 500 cm À1 beobachtet werden.…”
unclassified
“…The so-called 'inert carbon-free radicals' belong mainly to the perchlorodiphenylmethyl (Ballester & Riera, 1954), perchlorotriphenylmethyl (Ballester, 1967;Ballester, Riera, Castafier, Badfa & Mons6, 1971) and 9-phenylfluorenyl radical (Ballester, Castafier & Pujadas, 1971) classes. They have chemical and thermal stabilities which are higher than those of the majority of normal tetrahedral carbon compounds and materials.…”
Section: Commentmentioning
confidence: 99%