Fluxional dynamics of terpyridine ligand in [Ru(bpy-d8)2(η2-tpy)]2+ complex

Authors

  • MA Rahman Department of Chemistry, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh
  • S Rajbangshi Department of Chemistry, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh

DOI:

https://doi.org/10.3329/bjsir.v55i4.50961

Keywords:

Terpyridine; Polypyridyl ligands; Deuteration; Fluxional; Tick-tock twist

Abstract

Herein, we report the fluxional dynamic behaviour of terpyridineligand in [Ru(bpy-d8)(η2-tpy)]2+ 1. Reaction of Ru(bpy-d8)2Cl2·2H2O with 2,2′:6′,2′′-terpyridine in refluxing methanol afforded 1. Complex 1 has been characterized by 1H NMR spectroscopic analysis. Variable temperature 1H NMR data reveals that the pendant pyridine ring of the tpy ligand in Ru(bpy-d8)2(tpy)]2+ rotates which effects the adjacent ring protons. Moreover, protonation of 1 with trifluoroacetic acid (TFA) confirms that peripheral N on the pendant pyridyl ring of the tpy ligand affects the chemical shifts of protons on the tpy pendant pyridyl ring.

Bangladesh J. Sci. Ind. Res.55(4), 253-260, 2020

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Published

2020-12-27

How to Cite

Rahman, M., & Rajbangshi, S. (2020). Fluxional dynamics of terpyridine ligand in [Ru(bpy-d8)2(η2-tpy)]2+ complex. Bangladesh Journal of Scientific and Industrial Research, 55(4), 253–260. https://doi.org/10.3329/bjsir.v55i4.50961

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Articles