Preparation and structural characterization of a dicopper prehelicate

In the reaction of 4`-(4-ethynylphenyl)-2,2`:6`,2``-terpyridine (3) with trans- [PtI2(PEt3)(2)] and CuI, ligand 3 scavenges Cu(I) and forms [Cu-2(PPh3)(2)(mu-I)(mu-3)]I, structural characterization of which shows that ligand 3 adopts a helical twist that parallels that found in related double helicates. (C) 2005 Elsevier B.V. All rights reserved.

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