Pablo Fernandez

Coordination chemistry of neutral quinolyl- and aminophenylcyclopentadiene derivatives

Abstract The cyclopentadiene and indene derivatives 1 – 4 being functionalised by a dimethylaniline and quinolyl group, respectively, were treated with metal carbonyl complexes. Whereas cyclopentadienes (C 5 R 5 H) normally loose one hydrogen atom prior or during metal complex formation, leading to negatively charged cyclopentadienide ligands, the compounds 1 – 4 are able to act as neutral ligands without hydrogen loss. Consequently transition metal complexes with coordination of the nitrogen donor and a CC double bond of the five membered ring have been obtained. In some cases a hydrogen atom is eliminated and the expected η 5 -(C 5 R 5 ) complexes are formed. Reaction of Ru 3 (CO) 12 with 2 leads to the binuclear η 6 -fulvene complex 8 . The octahedral molybdenum complex 9 and the square planar rhodium(I) complexes 10 and 11 which were obtained from Mo(CO) 6 and [Rh(CO) 2 Cl] 2 , respectively, are rare examples of η 2 -(C 5 R 5 H) coordination to metal atoms.