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

Abstract

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 novel µ₃-η¹∶η²∶η² mode. In contrast, correlation ¹H NMR shows that the 4-bromo[2.2]paracyclophane ligand in the latter compound is coordinated via the unsubstituted ring. These observations are consistent with the relative activating and deactivating effects of the substituents.