Macrocyclic high-spin (S = 2) molecule: Spin identification of a sterically rigid metacyclophane-based nitroxide tetraradical by two-dimensional electron spin transient nutation spectroscopy

Abstract

A spin quintet: The electronic and molecular structure of the metacyclophane-based spin-quintet tetraradical 1 with a sterically controlled rigid structure and small fine-structure parameters is characterized. Pulse-ESR based 2D electron spin nutation spectroscopy allows the spin multiplicity of 1 to be unequivocally identified, providing its fine-structure parameters and g-values. (Chemical Equation Presented). © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.