Аннотация:This chapter provides an overview of tetracoordinated organogermanium compounds, containing Ge–E bonds (E is an atom of a Group 13-17 element except Ge). The main focus is on the methods of synthesis; the major structural and spectral features of the germanes determined by XRD and NMR spectroscopy are discussed briefly. The literature coverage is from 2000 to 2020 and includes 700 references.