Add time:09/07/2019         Source:sciencedirect.com

The action of pyridine, α-,β-,γ-picoline, 2,4-lutidne and PEt3 on CCl4 solutions of [NiCl(C6Cl5)(PPh3)]2 gives the new compounds [NiCl(C6Cl5)L(PPh3)]. In the case of pyridine only, use of an excess of the base gives the compound [NiCl(C6Cl5)(py)2]. The concomitant formation of [NiCl(C6Cl5)(PPh3)2] in all the reactions, and the formation of [NiCl(C6Cl5)(py)2] suggest that replacement of PPh3 by L ocurs before cleavage of the dinuclear compound. The action of HCl on chloroform solutions of the new compounds indicates a greater stability for those containing only phosphines as ligands.

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