Synthesis and characterisation of amino and bromo ring substituted derivatives of [Ru6C(CO)(14)L] (L = [2.2]paracyclophane)

The synthesis, isolation and characterisation of two new cluster complexes [Ru6C(CO)(14)(C16H15NH2)] 1 and [Ru6C(CO)(14)(C16H15Br)] 2 are reported. An X-ray crystallographic study has shown that the 4-amino[2.2]paracyclophane ligand in the former compound is coordinated via its aniline ring in the n ovel mu(3)-eta(1):eta(2):eta(2) mode. In contrast, correlation H-1 NMR show s that the 4-bromo[2.2]paracyclophane ligand in the latter compound is coor dinated via the unsubstituted ring. These observations are consistent with the relative activating and deactivating effects of the substituents.