Structural diversity in Ni II cluster chemistry: Ni 5 , Ni 6 , and {NiNa 2 } n complexes bearing the Schiff-base ligand N-naphthalidene-2-amino-5-chlorobenzoic acid

• Published in: Dalton transactions : an international journal of inorganic chemistry 2016, Vol.45 (25), p.10256-10270
• Main Authors: Perlepe, Panagiota S., Cunha-Silva, Luís, Bekiari, Vlasoula, Gagnon, Kevin J., Teat, Simon J., Escuer, Albert, Stamatatos, Theocharis C.
• Format: Article
• Language: English
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/C6DT01162D

The employment of the fluorescent bridging and chelating ligand N -naphthalidene-2-amino-5-chlorobenzoic acid (nacbH 2 ) in Ni II cluster chemistry has led to a series of pentanuclear and hexanuclear compounds with different structural motifs, magnetic and optical properties, as well as an interesting 1-D coordination polymer. Synthetic parameters such as the inorganic anion present in the NiX 2 starting materials (X = ClO 4 − or Cl − ), the reaction solvent and the nature of the organic base employed for the deprotonation of nacbH 2 were proved to be structure-directing components. Undoubtedly, the reported results demonstrate the rich coordination chemistry of nacbH 2 in the presence of Ni II metal ions and the ability of this chelate to adopt a variety of different modes, thus fostering the formation of high-nuclearity molecules with many physical properties.