Synthesis and Reactivity of Four- and Five-Coordinate Low-Spin Cobalt(II) PCP Pincer Complexes and Some Nickel(II) Analogues.

ABSTRACT: Anhydrous CoCl₂ or [NiCl₂(DME)] reacts with the ligand PCP^Me-iPr (1) in the presence of nBuLi to afford the 15e and 16e square planar complexes [Co(PCP^Me-iPr)Cl] (2) and [Ni(PCP^Me-iPr)Cl] (3), respectively. Complex 2 is a paramagnetic d⁷ low-spin complex, which is a useful precursor for a series of Co(I), Co(II), and Co(III) PCP complexes. Complex 2 reacts readily with CO and pyridine to afford the five-coordinate square-pyramidal 17e complexes [Co(PCP^Me-iPr)(CO)Cl] (4) and [Co(PCP^Me-iPr)(py)Cl] (5), respectively, while in the presence of Ag⁺ and CO the cationic complex [Co(PCP

SUBMITTER: Murugesan S 

PROVIDER: S-EPMC5021385 | biostudies-literature | 2014 Nov

REPOSITORIES: biostudies-literature