12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Fluxionality and Lability in Rhenium 4’-Hydroxy...
View graph of relations

« Back

Fluxionality and Lability in Rhenium 4’-Hydroxyterpyridine complexes: Evidence for an Associative Mechanism and Cooperative Fluxionality and Lability

Research output: Contribution to journalJournal article

Published

  • Vanesa Fernandez-Moreira
  • Flora L. Thorp-Greenwood
  • Richard J. Arthur
  • BM Kariuki
  • Robert L. Jenkins
  • Michael Coogan
Journal publication date2010
JournalDalton Transactions
Journal number32
Volume39
Number of pages11
Pages7493-7503
Original languageEnglish

Abstract

The complexes [ReX(CO)3(N,N-η2-4′-hydroxy-2-2′,6′-2′′-terpyridine)] (X = Cl,Br,I) have been synthesised and their ligand exchange reactions and fluxionality of the terpyridine unit studied. The halides are far more labile in these species than in analogous bipyridines, and it is proposed that the ligand fluxionality is involved in this reactivity. Structural studies of the family are reported along with spectroscopic studies including variable temperature NMR which is used to demonstrate a negative entropy of activation for the fluxional process. Synthesis of an analogue which is incapable of fluxional behaviour confirms the link between fluxionality and lability in these complexes.