Scheme 1
From: Neutral 4π-electron tetrasilacyclobutadiene contains unusual features of a Möbius-type aromatic ring

Synthetic route. Formation of compounds 1–3, R = iPr2P-C6H4; L = PhC(NtBu)2.
From: Neutral 4π-electron tetrasilacyclobutadiene contains unusual features of a Möbius-type aromatic ring

Synthetic route. Formation of compounds 1–3, R = iPr2P-C6H4; L = PhC(NtBu)2.