XXIIIrd International Congress of Pure and Applied Chemistry 1971
DOI: 10.1016/b978-0-408-70318-5.50004-2
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CHEMICALLY INDUCED DYNAMIC NUCLEAR POLARIZATION IX (l): PHOTOREACTIONS OF SOME KETONES

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Cited by 10 publications
(4 citation statements)
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“…A similar influence of temperature on photo-CIDNP. has not been found for other ketones, e.g., pinacolone at -6 0°s t~2 5 " [21] [33] [36], di-t-butyl ketone at -9 3 "~t s 2 5 " [I91 [21], and dibenzyl ketone at -3 5 "~t~7 O 0 [33] [37]. In all these cases the CIDNP.…”
mentioning
confidence: 99%
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“…A similar influence of temperature on photo-CIDNP. has not been found for other ketones, e.g., pinacolone at -6 0°s t~2 5 " [21] [33] [36], di-t-butyl ketone at -9 3 "~t s 2 5 " [I91 [21], and dibenzyl ketone at -3 5 "~t~7 O 0 [33] [37]. In all these cases the CIDNP.…”
mentioning
confidence: 99%
“…[21] [33] except in CC1, where exciplex mechanisms have been proposed [42]. From the lack of temperature-dependent fluorescence [38] [43] of several aliphatic ketones with long S1 lifetimes Turro et al [38] recently concluded that S , a-cleavage either proceeds with zero activation energy or does not occur in the temperature range -5"s t I 80".…”
mentioning
confidence: 99%
“…Neben dieser Keaktion wird, insbesondere bei u-Arylaldehyden, u , P-ungesattigten Aldehyden und bei rein aliphatischen Aldehyden fur A 5 270 nm eine intramolekulare Decarbonylierung nach HCR ---+ H R + CO (2) die nicht uber freie Radikale ablauft [9] [17] aus den Intensitaten A1 = I-I, der Signale wahrend und I,(t) nach Bestrahlungsende zur Zeit t bestimmt. Die Relaxationszeitlronstanten T, wurden nach der nrapid passage)) Methode [19] …”
Section: )unclassified
“…-In den letzten Jahren haben wir und andere in einer Reihe von Arbeiten [l- ------+ K-C. + * R R = CH,, R' = C(CH,), [2] R = R' -= CH(CH,), [4] K == R' = C(CH,), [6! an die sich Sekundarprozesse der entstehenden Acyl-und Alkylradikale anschliessen. Rei photochemischen Reaktionen in Fliissigkeiten und in der Gasphase nachgewiesene PI-odukte 112-141 lassen erkennen, dass G1.…”
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