Phosphino-indenyl complexes of nickel(II)

Abstract

The BH3-protected phosphinoindenyl ligand indenyl(CH2)2PPh2·BH3 was used in the preparation of (η5/3:η0-indenyl(CH2)2PPh2·BH3)Ni(PPh3)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 (η5/3:η1-indenyl(CH2)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 {κP,κC,κP-1,3-(CH2CH2PPh2)2-2-indenyl}NiCl, which has been characterized by X-ray diffraction studies.Key words: indenyl complexes, tethered phosphines, PCP pincer complexes.