Organometallic Compounds with Bridged or (Dimethylaminoethyl)-Substituted Cyclopentadienyl Ligands

Abstract

We report here the synthesis and structure of organometallic compounds with bridged or dimethylaminoethyl-substituted cyclopentadienyl ligands. A short survey of p- and d-block complexes with pentafulvalenediyl or silicon-linked cyclopentadienyl systems is followed by a discussion of cyclopentadienyl compounds containing the bi(poly)dentate ligands C₅R₄CH₂CH₂NMe₂ (R=H, Me) and s- or p-block elements. Compounds of the type (C₅R₄CH₂CH₂NMe₂)M (M=Li, K, Tl), (C₅R₄CH₂CH₂NMe₂)₂Ca, (C₅R₄CH₂CH₂NMe₂)EIMe₃ (El=Si, Sn), and (C₅R₄CH₂CH₂NMe₂)MX₂ (M=Al, Ga, In; X=H, Me, Et, Cl, Br, I) have been obtained. Those with group 2 and group 13 elements as central atoms show an intramolecular coordination of the nitrogen atom and monomeric structures; sufficient volatilities make them potential candidates for MOCVD-processes.

Key Words:

• Bridged cyclopentadienyls
• dimethylaminoethyl-functionalized cyclopentadienyls
• metal complexes
• intramolecular coordination