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Photochemische Primärreaktionen α‐verzweigter aliphatischer Ketone und Aldehyde in lösung
Author(s) -
Blank Bernd,
Henne Andreas,
Fischer Hanns
Publication year - 1974
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19740570348
Subject(s) - chemistry , cidnp , isobutyraldehyde , ketone , singlet state , aldehyde , photochemistry , benzene , triplet state , methyl ketone , molecule , primary (astronomy) , photodissociation , polarization (electrochemistry) , organic chemistry , excited state , catalysis , physics , astronomy , nuclear physics
UV.‐Irradiation of methyl t ‐butyl ketone, di‐ t ‐butyl ketone, pivalaldehyde and isobutyraldehyde in benzene solution leads to chemically induced dynamic nuclear polarization (CIDNP.) of the parent compounds and of various reaction products. CIDNP.‐effects and product distributions establish type I α‐cleavage predominantly of triplet state molecules as the major primary photochemical step for all the four α‐branched carbonyl compounds. In chlorinated solvents singlet reactions interfere with the triplet processes.