Germanium and Tin Monoxides Trapped by Oxophilic Germylene and Stannylene Ligands

Abstract

Germanium and tin monoxides (MO, M = Ge, Sn) were trapped by the 1,2,4-diazaphospholide-based germylene and stannylene M[3,5-tBu₂dp]₂ (M = Ge (2), Sn (3)), resulting in the Lewis acid-base adduct of composition M(μ-O)[M{η¹(N)-(3,5-tBu₂dp)}₂]₂ (M = Ge (4), Sn (5)). Compounds 4 and 5 were characterized by single-crystal X-ray structural analysis. The bonding features of 4 and 5 were supported by DFT calculations.