The correct quinoid structure for the dimer was suggested as early as 1904 but this structure was soon after abandoned by the scientific community in favor of hexaphenylethane which is structure 4 in scheme 1.
Правильная хиноидная структура димера была предложена уже в 1904, но вскоре научное сообщество отказалось от этой структуры в пользу структуры 4 (рис.