Hexasubstitution of apical triflate lig
ands in the octahedral clusters [
M]
2[Mo
6X
8(CF
3SO
3)
6] (M =
n-Bu
4N or Cs, X =Br or I)
and monosubstitution in [
n-Bu
4N]
2[Mo
6Br
13(CF
3SO
3)] was carried out in tetrahydrofuran at 60
mages/entities/deg.gif">C with si
mplepyridines
and then extended to organo
metallic pyridines, yielding cluster-cored stars,
and to dendronic polyallyl-
and polyferrocenylpyridines, yielding cluster-cored polyallyl
and polyferrocenyl dendri
mers
and dendrons. The orangepyridine-substituted clusters, whose pyridine protons are deshielded in
1H NMR (a practical tool for characterization),are air-stable
and ther
mally stable with si
mple pyridines, light-
and air-sensitive with organo
metallic pyridines,
andair-fragile
and ther
mally fragile with large dendronized pyridines.