Phosphino-indenyl complexes of nickel(II)

Article abstract of DOI:10.1139/v05-079

The BH₃-protected phosphinoindenyl ligand indenyl(CH ₂)₂PPh₂·BH₃ was used in the preparation of (η^5/3:η⁰-indenyl(CH ₂)₂PPh₂·BH₃)Ni(PPh ₃)Cl, which has been characterized by NMR spectroscopy and X-ray diffraction studies. On the other hand, all attempts at preparing the closely related complex (η^5/3:η¹indenyl(CH ₂)₂PPh₂)NiCl, in which the tethered phosphine moiety is coordinated to the Ni centre, were unsuccessful. One of these unsuccessful attempts yielded instead the novel indenyl-PCP pincer complex {K^P,K^C,K^P-1,3-(CH₂CH ₂PPh₂)₂-2-indenyl}NiCl, which has been characterized by X-ray diffraction studies.