title: Polyoxotungstates now also with pentagonal units: supramolecular chemistry and tuning of magnetic exchange in {(M)M5}12V30 Keplerates (M = Mo, W).
abstract: The deliberate synthesis of the Keplerate [K(20) subset{(W)W(5)O(21)(SO(4))}(12)(VO)(30)(SO(4))(H(2)O)(63)](18-) with 20 pores all closed by K(+) in a supramolecular fashion proves that it is possible to follow new routes in polyoxotungstate chemistry based on pentagonal {(W)W(5)}-type units and to tune magnetic exchange couplings in {(M)M(5)}(12)M'(30) type Keplerates.
authors.affiliation: Fakultät für Chemie, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany.
authors.forename: Ana Maria
authors.initials: AM
authors.lastname: Todea
authors.forename: Alice
authors.initials: A
authors.lastname: Merca
authors.forename: Hartmut
authors.initials: H
authors.lastname: Bögge
authors.forename: Thorsten
authors.initials: T
authors.lastname: Glaser
authors.forename: Larry
authors.initials: L
authors.lastname: Engelhardt
authors.forename: Ruslan
authors.initials: R
authors.lastname: Prozorov
authors.forename: Marshall
authors.initials: M
authors.lastname: Luban
authors.forename: Achim
authors.initials: A
authors.lastname: Müller