Hexasubstitution of apical triflate ligands 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
![](/images/entities/deg.gif)
C with simplepyridines and then extended to organometallic pyridines, yielding cluster-cored stars, and to dendronic polyallyl-and polyferrocenylpyridines, yielding cluster-cored polyallyl and polyferrocenyl dendrimers and dendrons. The orangepyridine-substituted clusters, whose pyridine protons are deshielded in
1H NMR (a practical tool for characterization),are air-stable and thermally stable with simple pyridines, light- and air-sensitive with organometallic pyridines, andair-fragile and thermally fragile with large dendronized pyridines.