title: p-Hydroquinone-metal compounds: synthesis and crystal structure of two novel VV-p-hydroquinonate and VIV-p-semiquinonate species.
abstract: Reaction of the p-hydroquinone derivative H2Na4bicah.4H2O with either VIVOSO(4).3H2O and NaVVO3 in equivalent quantities or with NaVVo3 yields the tetranuclear VIVO2+ macrocycle-semiquinonate compound Na6[(VIVO)4-(mu2-O)2[mu2-bicas.(-5)-N,O,O,O]2].Na2SO(4).20H2O (1.Na2SO(4).20H2O) and the dinuclear cis-VVO2(+)-hydroquinone species Na4[(VVO2)2[mu2-bicah(-6)-N,O,O,O]].11H2O (2.11H2O) respectively. Compounds 1.Na2SO(4).20H2O and 2.11H2O were characterized by X-ray structure analysis and ab initio calculations.
authors.affiliation: Department of Chemistry, University of Cyprus, Nicosia 1678, Cyprus.
authors.forename: Chryssoula
authors.initials: C
authors.lastname: Drouza
authors.forename: Vagelis
authors.initials: V
authors.lastname: Tolis
authors.forename: Volker
authors.initials: V
authors.lastname: Gramlich
authors.forename: Cathrine
authors.initials: C
authors.lastname: Raptopoulou
authors.forename: Aris
authors.initials: A
authors.lastname: Terzis
authors.forename: Michael P
authors.initials: MP
authors.lastname: Sigalas
authors.forename: Themistoklis A
authors.initials: TA
authors.lastname: Kabanos
authors.forename: Anastasios D
authors.initials: AD
authors.lastname: Keramidas