Fig. 6. Selected examples of aryl-type stabilized dimetallenes and dimetallynes. 1: 1a6: E = Si, R = Mes (Mes = 2,4,6-trimethylphenyl) 1b70,71: E = Ge, R = Mes 1c72: E = Si, R = Tip (Tip = 2,4,6-triisopropylphenyl) 1d73: E = Ge, R = 2,5-tBu2C6H3; 2;743;754: 4a60: E = Si, Bbt: R = CH(SiMe3)2 R′ = C(SiMe3)34b76: E = Ge, Bbt: R = CH(SiMe3)2 R′ = C(SiMe3)34c47: E = Si, Tbb: R = CH(SiMe3)2 R′ = t-Bu 4d45: E = Ge, Tbb: R = CH(SiMe3)2 R′ = t-Bu; 5: 5a12: E = Ge, Ar′: R = i-Pr R′ = H 5b11: E = Sn, Ar′: R = i-Pr R′ = H 5c29: E = Pb, Ar′: R = i-Pr R′ = H 5d77,78: E = Ge, Ar*: R = i-Pr R′ = i-Pr 5e56: E = Sn, Ar*: R = i-Pr R′ = i-Pr 5f9: E = Pb, Ar*: R = i-Pr R′ = i-Pr.
