Structures of new bis(pentafluorophenyl)halogeno mercurates [{Hg(C6F5)2}3(μ-X)]- (X =Cl, Br, I)

From the reactions of [PNP]Cl or [PPh4]Y (Y = Br, I) with Hg(C6F5)(2) crystals of the composition [Cat][{Hg(C6F5)(2)}(3)X] (Cat = PNP, X = Cl (1); Cat = PPh4, X = Br (2), I (3)) are formed. I crystallizes in the triclinic space group P (1) over bar, 2 and 3 crystallize isotypically in the monoclinic space group C2/c. In the crystals the halide anions are surrounded by three Hg(C6F5)(2) molecules. The reaction of [PPh4]Br with Hg(C6F5)(2) under slightly changed conditions gives the compound [PPb4](2)[{Hg(C6F5)(2)}(3)(mu-Br)]-[{Hg(C6F5)(2)}(2)(mu-Br)] (4).