title: Stereoisomerism in polyoxometalates: structural and spectroscopic studies of bis(malate)-functionalized cluster systems.
abstract: The tetrameric macrocycle [(P(mu-NtBu))2(1,4-(NH)2C6H4)]4, obtained from the reaction of the phosphazane dimer [ClP(mu-NtBu)]2 with p-phenylenediamine, has an unusual folded conformation in the solid state and contains a roughly tetrahedral arrangement of endo N-H groups for the potential coordination of anions.
authors.affiliation: Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA 30322, USA.
authors.forename: Xikui
authors.initials: X
authors.lastname: Fang
authors.forename: Travis M
authors.initials: TM
authors.lastname: Anderson
authors.forename: Yu
authors.initials: Y
authors.lastname: Hou
authors.forename: Craig L
authors.initials: CL
authors.lastname: Hill
mesh_terms: D018360:Crystallography, X-Ray; D009682:Magnetic Resonance Spectroscopy; D008293:Malates / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D013237:Stereoisomerism; D017973:Tungsten Compounds / Q000737:chemistry*
chemical_list: D008293:Malates; D017973:Tungsten Compounds; C030298:malic acid