title: [Mo16O53F2]12-: a new polyoxofluoromolybdate anion.
abstract: Single crystals of a new beta-octamolybdate salt containing protonated 1,4-diazabicyclo[2.2.2]octane cations were prepared under mild hydrothermal conditions. This compound, [C6H13N2]2[C6H14N2][Mo8O26], was then used as a starting material in the synthesis of [C6H13N2]6[Mo16O53F2].4H2O, which contains previously unreported [Mo16O53F2]12- anions. The structure-directing properties of gamma-[Mo8O26]4-, a likely intermediate in this pH-dependent transformation, are responsible for the site selection of the fluoride incorporation. [Mo16O53F2]12-, the largest reported polyoxofluoromolybdate cluster, expands upon the limited number of such anions in the literature. The structures of both compounds were determined using single-crystal X-ray diffraction.
authors.affiliation: Department of Chemistry, Haverford College, Haverford, Pennsylvania 19041, USA.
authors.forename: Adam K
authors.initials: AK
authors.lastname: Stover
authors.forename: Jesse R
authors.initials: JR
authors.lastname: Gutnick
authors.forename: Amy Narducci
authors.initials: AN
authors.lastname: Sarjeant
authors.forename: Alexander J
authors.initials: AJ
authors.lastname: Norquist