Abstract
The photochemistry of the clusters [Os3(CO)10(diene)] (diene = cis-1,3-butadiene, 1,3-cyclohexadiene) was studied in detail. Upon near-UV irradiation photofragmentation occurs to give mononuclear [Os(CO)3(diene)]. The second fragmentation product [Os2(CO)7] was trapped by reaction with CO, or with alkenes at low temperatures, to produce the dinuclear complexes [Os2(CO)7(L)2] (L = CO, ethene, 1-octene). The fragmentation was studied further with nanosecond time-resolved UV-Vis and IR spectroscopy and was found to proceed via the initial formation of a triosmium photoproduct with a lifetime of about 100 ns in hexane. From the spectroscopic data we infer that this intermediate has a coordinatively unsaturated open-triangle structure with two bridging carbonyl groups, one bridging the split (CO)4Os-Os(CO)2(diene) bond. (C) 2000 Elsevier Science S.A.
Original language | English |
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Pages (from-to) | 597-603 |
Number of pages | 7 |
Journal | Inorganica Chimica Acta |
Volume | 300-302 |
DOIs | |
Publication status | Published - 30 Apr 2000 |
Keywords
- Diene complexes
- Osmium complexes
- Photochemistry
- Triosmium complexes
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry