Monometallic and Multimetallic Zinc Complexes of 2,7-Bis(2-pyridyl)-1,8-naphthyridine

• Published in: Critical studies in media communication Vol. 75; no. 1&2; p. 135
• Main Authors: Stevens, Michael A, Hall, Peter D, Colebatch, Annie L
• Format: Journal Article
• Language: English
• Published: Collingwood CSIRO 01-01-2022
• Subjects: Catalysis; Chemical synthesis; Crystallography; Ligands; NMR; Nuclear magnetic resonance; Protonation; Single crystals; Zinc; Zinc acetate; Zinc chloride
• ISSN: 1529-5036
• DOI: 10.1071/CH21129

A series of zinc complexes of 2,7-bis(2-pyridyl)-1,8-naphthyridine (BPNP) has been synthesised and characterised by single crystal X-ray diffraction and solution state NMR spectroscopic studies. Reactions of BPNP with zinc acetate and zinc chloride were found to give mononuclear complexes of the form [Zn(BPNP)X2] (X = OAc, Cl), whereas reactions with zinc triflate led to a mixture of products. Several of these were identified crystallographically as [Zn(BPNP-H)(H2O)4](OTf)3 and [Zn(BPNP-H)(NCMe)(OTf)2]OTf, in which protonation of one pyridyl group occurred, and the dimeric species [Zn2(BPNP)4(μ-H2O)2](OTf)4. A trimetallic complex [Zn3(μ2-BPNP)(μ2-OAc)3(OAc)2(μ3-OH)] was also isolated from reactions involving zinc acetate, and demonstrates the ability of BPNP to coordinate two zinc atoms in the adjacent binding pockets.