Dynamic NMR study of the hindered Pt-N(bipyridine) rotation in metal-directed self-assembled macrocycles

Org Lett. 2005 Oct 27;7(22):4971-3. doi: 10.1021/ol051910u.

Abstract

[reaction: see text] The activation parameters for the hindered Pt-N(bipyridyl) rotation observed for a self-assembled rectangle and triangle have been investigated by temperature-dependent and selective inversion recovery (SIR) NMR spectroscopy. The enthalpy of activation (DeltaH) and change in entropy (DeltaS) were determined to be +52.2 kJ/mol and -58.2 J/mol.K for the rectangle and +59.1 kJ/mol and -71.8 J/mol.K for the triangle, respectively, by SIR.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Macrocyclic Compounds / chemical synthesis*
  • Macrocyclic Compounds / chemistry
  • Magnetic Resonance Spectroscopy
  • Platinum / chemistry*
  • Pyrimidines / chemistry*
  • Temperature
  • Thermodynamics

Substances

  • Macrocyclic Compounds
  • Pyrimidines
  • Platinum