MOLECULAR ZINTL PHASES with tetra-anionic Si, Ge, Sn, Pb accessible using soluble form of Mg(0). Although all E(4-) anions are full valence-shell octets, they are highly reactive. Some are stable, some not. The Sn(-IV) complex is an 8e-reductant shorturl.at/InmD6 @natsynth.nature.com
