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Keywords:

  • deprotonation;
  • lithium;
  • metal–metal bonding;
  • tin;
  • X-ray diffraction
Thumbnail image of graphical abstract

An unusual, paramagnetic SnII-centered cage [{[Sn(L)(NMe2)Li(thf)][Sn(L)Li(thf)3]Sn}2] (see crystal structure) is generated by the treatment of 2-aminophenylphosphane (1-PH2-2-NH2C6H4) with nBuLi and [Sn(NMe2)2]. Remarkable quadruple deprotonation of the ligand results upon use of this mixed system consisting of an alkali-metal base and a p-block dimethylamide.