New pyridyl-functionalized organoiron alkynyl complexes. Easy access to polymetallic architectures featuring an electroactive site by simple co-ordination reactions
S. Le Stang et al., New pyridyl-functionalized organoiron alkynyl complexes. Easy access to polymetallic architectures featuring an electroactive site by simple co-ordination reactions, J ORGMET CH, 572(2), 1999, pp. 189-192
The functionalized complexes 3a-d [(dppe)Cp*Fe(C=C-L)] (L = 4-Py, 3-Py, 2-P
y) were isolated with good yields from the alkynyl complex 1 [(dppe)Cp*Fe(C
=CH)1 (dppe = 1,2-bis(diphenylphosphino)ethane) from the corresponding brom
opyridines using a Sonogashira-coupling reaction. These redox active compou
nds are stable under two redox states and react as usual pyridyl ligands to
wards methyl iodide or (THF)W(CO)(5). They allow easy access to the corresp
onding pyridinium salt 4a or to the dimetallic iron-tungsten complex 5a. (C
) 1999 Elsevier Science S.A. All rights reserved.