Read the seminal paper by Rivard entitled Donor/Acceptor stabilization of Ge(II) dihydride and come to class prepared to discuss it.
Read also the article Stabilization of the Heavy Methylene Analogues, GeH2 and SnH2, within the coordination sphere of a Transition Metal and come to class prepared to discuss it.
Follow the impact of the Rivard papers to the present day by reading one or more recent papers that cite them. Come prepared to discuss the recent Rivard-citing work as well.