title: Direct C-N Coupling in an in Situ Ligand Transformation and the Self-Assembly of a Tetrametallic [Ni(II)4] Staircase.
abstract: A [Ni(II)4] staircase complex was serendipitously prepared from the reaction of the binucleating Schiff base proligand 2,6-bis[[(3-hydroxypropyl)imino]methyl]-4-methylphenol (H3L2) and 3,5-dimethylpyrazole (Me2pzH) with nickel(II) nitrate in a reaction at room temperature, initially aimed to yield a dinuclear complex. From a room temperature metal ion/ligand reaction, the proligand H3L2 in situ transformed to modified forms HL3(2-) and HL4(2-), allowing the [Ni4] formation. Variable-temperature magnetic behavior of a [Ni4] complex reveals antiferromagnetic interactions with stabilization of a diamagnetic ground state (ST = 0).
authors.affiliation: †Department of Chemistry, Indian Institute of Technology, Kharagpur 721 302, India.
authors.forename: Aloke Kumar
authors.initials: AK
authors.lastname: Ghosh
authors.affiliation: †Department of Chemistry, Indian Institute of Technology, Kharagpur 721 302, India.
authors.forename: Tufan
authors.initials: T
authors.lastname: Singha Mahapatra
authors.affiliation: ‡CNRS, CRPP, UPR 8641, F-33600 Pessac, France.|§Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France.
authors.forename: Rodolphe
authors.initials: R
authors.lastname: Clérac
authors.affiliation: ⊥CNRS, ICMCB, UPR 9048, F-33600 Pessac, France.|∥Univ. Bordeaux, ICMCB, UPR 9048, F-33600 Pessac, France.
authors.forename: Corine
authors.initials: C
authors.lastname: Mathonière
authors.affiliation: ¶Dipartimento di Scienze Chimiche e Farmaceutiche and Centro di Strutturistica Diffrattometrica, Università di Ferrara, via L. Borsari, 46, I44121 Ferrara, Italy.
authors.forename: Valerio
authors.initials: V
authors.lastname: Bertolasi
authors.affiliation: †Department of Chemistry, Indian Institute of Technology, Kharagpur 721 302, India.
authors.forename: Debashis
authors.initials: D
authors.lastname: Ray