Winkler was able to prepare several new compounds of germanium, including fluorides, chlorides, sulfides, dioxide, and tetraethylgermane (Ge(C2H5)4), the first organogermane.
Winkler a reușit să prepare câțiva compuși noi ai germaniului, inclusiv fluoruri, cloruri, sulfuri, dioxid de germaniu și tetraetilgerman (Ge(C2H5)4), primul organogerman.