Metalated diphosphanylsiloxanes with polycyclic and polymeric structures

The reactions of the diphosphanylsiloxane O(SiiPr2PH2)2 (1) with MiPr3 (M = Ga, In) produced the polycyclic compounds [O{SiiPr2(PH)MiPr2}{SiiPr2(P)MiPr}] 2 (2, 3). Compounds 2 and 3 are composed of three M2P2 rings forming a ladder structure and two OSi2P2M rings. By reactions of 1 with n-BuLi the polymeric compound [O(SiiPr2PHLi)2(THF)(TMEDA)] · THF (4) was obtained.

The polycyclic compounds 2 and 3 (see figure) have been obtained from the reaction of the diphosphanylsiloxane O(SiiPr2PH2)2 with MiPr3 (M = Ga, In). The same diphosphanylsiloxane reacts with n-BuLi under formation of a polymeric Li–P chain compound.Figure optionsDownload as PowerPoint slide