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RESEARCH ARTICLE
Contents Vol 75(2)

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

Michael A. Stevens https://orcid.org/0000-0001-9800-8366 A , Peter D. Hall https://orcid.org/0000-0001-9848-8224 A and Annie L. Colebatch https://orcid.org/0000-0001-6920-3744 A B
+ Author Affiliations
- Author Affiliations

A Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia.

B Corresponding author. Email: annie.colebatch@anu.edu.au




Annie received her PhD in 2015 from the Australian National University in the group of Professor Anthony Hill. She held an Endeavour Research Fellowship at the University of Bath with Professor Michael Hill, followed by post-doctoral positions with Professor Andrew Weller (University of Oxford) and Professor Dominic Wright (University of Cambridge). In July 2019, she was appointed as a Rita Cornforth Fellow at the Australian National University, where she currently holds an ARC DECRA exploring catalyst design strategies.

Australian Journal of Chemistry 75(2) 135-141 https://doi.org/10.1071/CH21129
Submitted: 28 May 2021  Accepted: 3 August 2021   Published: 19 August 2021

Abstract

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.

Keywords: zinc, naphthyridine, pyridyl, ligands, complexes, multimetallic, coordination compounds.


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