title: Unprecedented linking of two polyoxometalate units with a metal-metal multiple bond.
abstract: The reaction of (Bu(4)N)(2)[Re(2)Cl(8)] with lacunary Keggin polyoxometalate K(7)[PW(11)O(39)] in water produces a new dumbbell-shaped heteropolyoxometalate anion, [Re(2)(PW(11)O(39))(2)](8-), whose structure contains a central Re(2) core with a quadruple bond between Re atoms (Re-Re 2.25 A), coordinated to two polyoxometalate units. This complex represents the first example of the direct linking of two polyoxometalate units via a metal-metal multiple bond. The compounds were characterized by X-ray analysis, IR, and electrospray ionization mass spectrometry.
authors.affiliation: Nikolayev Institute of Inorganic Chemistry, SB RAS, 630090 Novosibirsk, Russia.
authors.forename: Maxim N
authors.initials: MN
authors.lastname: Sokolov
authors.forename: Vladimir S
authors.initials: VS
authors.lastname: Korenev
authors.forename: Natalya V
authors.initials: NV
authors.lastname: Izarova
authors.forename: Eugenia V
authors.initials: EV
authors.lastname: Peresypkina
authors.forename: Cristian
authors.initials: C
authors.lastname: Vicent
authors.forename: Vladimir P
authors.initials: VP
authors.lastname: Fedin