Although pentacoordinated Ge (1V) species' having a trigonal bipyramidal structure have been characterized by X-ray crystallography, no reports are available concerning the structure of a spirocyclic pentacoordinate Ge (1V) compound. We report herein the preparation and X-ray crystal structure of the first pentacoordinated Ge (1V) compound having a square pyramidal conformation. The compound, tetraethylammonium 2-chloro-2, ...