Inorganic Chemistry, Vol.38, No.24, 5476-5477, 1999
The [Cu8Br15](6-) ion, a crystal-stabilized high-symmetry mixed-valence copper complex with a linear halogen bridge
The [Cu8Br15](6-) ion in green crystalline (MePh3P)(6)[Cu8Br15] is shown by X-ray crystallography to have the structure [Br-3(mu(3)-Br4Cu4)(mu(2)-Br)(mu(3)-BT4Cu4)Br-3](6-) derived from two Cu4Br8 cubane units. The unusual geometry and charge of the anion are determined by the high-symmetry (space group Pa (3) over bar) lattice of cations, maintained by phenyl ... phenyl interactions, and interacting with the anion by C-H ... Br hydrogen bonds.
Keywords:CYTOCHROME-C-OXIDASE;INTERVALENCE CHARGE-TRANSFER;FARINFRARED-SPECTROSCOPY;ELECTRON-TRANSFER;A CENTER;AMINELIGANDS;2.8 ANGSTROM;BOND;HALIDES;PHOSPHINE