ISSN:
0009-2940
Schlagwort(e):
Aldehyde reactions
;
Ruthenium clusters
;
Oxidative addition
;
Chemistry
;
Inorganic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
Oxidative Addition of Aldehydes and Schiff Bases to Ru3(CO)12Aldehydes show a wide variation of their reactive behaviour towards Ru3(CO)12. Aliphatic and simple aromatic aldehydes form simple oxidative addition products Ru3(CO)10(μ-H)(μ-RC = O) (1) either not at all or in low yields as impure compounds, while under forcing conditions dinuclear ruthenium μ-carboxylate complexes or the hydride H2Ru4(CO)13 are formed. Electron-rich aldehydes give good yields of cluster type 1 (R = p-MeOC6H4, p-Me2NC6H4, ferrocenyl). Schiff bases behave similarly, their oxidative addition products being Ru3(CO)10(μ-H)(μ-RC = NR′) (10, R = C6H5, p-MeOC6H4, p-Me2NC6H4, R′ = C6H5, p-MeC6H4). Of the ortho-substituted benzaldehydes, the methoxy compound produces clusters 6 and 7 resulting from aldehyde oxidative addition and aromatic ortho metalation. Salicylaldehyde and its p-tolylimine give the compounds Ru3(CO)8(μ-η2-OC6H4CH = X)2 (9, 11, X = O, NC6H4Me) with a bridging phenolate and a terminally bound aldehydic O or Schiff base NR function. 3-Pyridinecarbaldehyde reacts quickly with Ru3(CO)12 to give products 8 derived from pyridine CH rather than aldehyde CH oxidative addition. The crystal structures of 9 and 11 were determined.
Zusätzliches Material:
2 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/cber.19921250521
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