title: Trinuclear nickel-lanthanide compounds.
abstract: The Schiff base compound 2,2'-{[(2-aminoethyl)imino]bis[2,1-ethanediyl-nitriloethylidyne]}bis-2-hydroxy-benzoic acid (H(4)L) as a proligand was prepared in situ from 3-formylsalicylic acid with tris(2-aminoethyl)amine (tren). The trinuclear 3d-4f metal complexes of this ligand {[Ln{Ni(H(2)L)(tren)}(2)](NO(3))(3)} (Ln = Gd, Dy, Er, Lu) could be obtained as single crystalline material by synthesizing the proligand in the presence of the metal salts [Ni(NO(3))(2)·(H(2)O)(6)] and [Ln(NO(3))(3)·(H(2)O)(m)] (Ln = Gd, Dy, Er, Lu). In the solid state, the complexes adapt a new V shaped structure. Mass spectrometric ion signals related to the trinuclear complexes were detected both in positive and negative ion mode via electrospray ionization mass spectrometry supporting the single crystal X-ray analysis. Hydrogen/deuterium exchange (HDX) experiments in solution support the fragmentation scheme. The magnetic studies on all these compounds suggest the presence of weak antiferromagnetic interactions between neighboring metal centers.
authors.affiliation: Institut für Anorganische Chemie, Karlsruher Institut für Technologie, Engesserstr. 15, Geb. 30.45, 76131 Karlsruhe, Germany.
authors.forename: Asamanjoy
authors.initials: A
authors.lastname: Bhunia
authors.forename: Munendra
authors.initials: M
authors.lastname: Yadav
authors.forename: Yanhua
authors.initials: Y
authors.lastname: Lan
authors.forename: Annie K
authors.initials: AK
authors.lastname: Powell
authors.forename: Fabian
authors.initials: F
authors.lastname: Menges
authors.forename: Christoph
authors.initials: C
authors.lastname: Riehn
authors.forename: Gereon
authors.initials: G
authors.lastname: Niedner-Schatteburg
authors.forename: Partha P
authors.initials: PP
authors.lastname: Jana
authors.forename: Radostan
authors.initials: R
authors.lastname: Riedel
authors.forename: Klaus
authors.initials: K
authors.lastname: Harms
authors.forename: Stefanie
authors.initials: S
authors.lastname: Dehnen
authors.forename: Peter W
authors.initials: PW
authors.lastname: Roesky
mesh_terms: D018360:Crystallography, X-Ray; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry*; D013696:Temperature
chemical_list: D028581:Lanthanoid Series Elements; D009942:Organometallic Compounds; D012545:Schiff Bases; D009532:Nickel