A Dendritic Macrocyclic Organic Polyradical with a Very High Spin of <i>S</i> =10

Abstract

Designed as a ferromagnetically coupled spin pentamer, the macrocyclic polyradical 1 possesses an average spin of S=10 in the ground state. This is the highest spin quantum number that has yet been measured for an organic molecule. Ar=tBuC₆ H₄ .