Tetranuclear MnII/ZnII and Novel Azido‐Bridged Chair‐Shaped Heptanuclear CdII Compounds: The Effect of Metal Ion and Coordination Mode of the Azide Group on the Structure of the Products. Issue 2 (27th December 2018)

• Record Type: Journal Article
• Authors: Afkhami, Farhad Akbari; Mahmoudi, Ghodrat; Khandar, Ali Akbar; Franconetti, Antonio; Zangrando, Ennio; Qureshi, Naseem; Lipkowski, Janusz; Gurbanov, Atash V.; Frontera, Antonio
• Is Part Of: European journal of inorganic chemistry. Issue 2(2019)
• Page Start: 262
• Page End: 270
• Publication Date: 2018-12-27
• Subjects: Azides -- Cadmium -- Molecular recognition -- Density functional calculations -- Hexameric water clusters; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201801254
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract : We report two tetranuclear compounds [MnL(N3 )]4 (1 ), [Zn4 L4 (N3 )2 ][Zn(N3 )4 ]· 3H2 O (2 ) and a novel heptanuclear cluster [Cd7 L6 (N3 )6 ](NO3 )1.33 (N3 )0.66 · 12H2 O (3 ) where L is a hydrazone Schiff base ligand based on pyridine. The ligand acts as a negatively charged tetradentate N3 O‐donor ligand and coordinates to the metal centers in the enolic form in 1 –3 . However, in compound 2, the ligand coordinated to the Zn II ion in the two different coordination modes. Metal centers in 1 and 2, bridged by the organic ligand form tetranuclear metal organic complexes and the N3 – anion acts as terminal ligand. In compound 3, N3 – acts as bridging ligand to the cadmium(II) centers, and form a rare heptanuclear cluster with an interesting chair conformation. The latter compound is a novel azido‐bridged chair‐shaped heptanuclear Cd II cluster that guides the formation of a water hexamer in the solid state. It acts as a robust binding block in the recognition of nitrate. The ability of the water hexamer to bind anions has been analyzed using DFT calculations and several computational tools. Abstract : Three multinuclear metal‐organic clusters have been prepared and characterized by X‐ray diffraction. For cadmium metal, a heptanuclear complex is formed that guides the creation of a hexameric water cluster that recognizes nitrate.