Fig. 1: Crystal structures of Cu4-Li+@C60 and Cu2(L).
From: Heterospin frustration in a metal-fullerene-bonded semiconductive antiferromagnet
a The coordination geometry of [Cu(N)3]4(Li+@C60) and the arrangement of Li-ion. One Li+@C60 coordinates with four Cu ions. The four Cu ions form a rectangular-like plane with a length and width of 9.5 and 5.5 Å, respectively. b The Li-ion coordinates with six carbon-ring and locates above or below the Cu-plane with thermal ellipsoids at the 50% probability. The Cu-plane perfectly splits the Li+@C60 cage in half. c The structure of the donor, Cu2(L) and its bond length. Colour code: C (black), Cu (blue), N (cyan), S (yellow), O (red) and Li (pastel blue).
