Extended Data Fig. 1: Overview of 1H NMR spectra.
From: The anti-aromatic dianion and aromatic tetraanion of [18]annulene
Comparison of the 1H NMR spectra of neutral 1 (THF-d8, 500 MHz, –40 °C), di-anion 1·Li2 (at –60 °C) and tetra-anion 12·Li8 (at –40 °C). All spectra in THF-d8, 500 MHz.
