title: Tetra-kis(1,3,4,6,7,8-hexa-hydro-2H-pyrimido[1,2-a]pyrimidin-9-ido-κN,N)niobium(V) hexa-fluorido-phosphate.
abstract: The title complex, [Nb(C(7)H(12)N(3))(4)]PF(6), features chelating hpp anions (hpp is 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrim-idine) that define a distorted dodeca-hedral coordination geometry based on an N(8) donor set. The Nb atom is situated on a site of symmetry , and the PF(6) (-) anion has crystallographic fourfold symmetry.
authors.forename: F Albert
authors.initials: FA
authors.lastname: Cotton
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Murillo
authors.forename: Pavel V
authors.initials: PV
authors.lastname: Poplaukhin
authors.forename: Nattamai
authors.initials: N
authors.lastname: Bhuvanesh
authors.forename: Edward R T
authors.initials: ER
authors.lastname: Tiekink