Germanium dichloride dioxane is a chemical compound with the formula GeCl2(C4H8O2), where C4H8O2 is 1,4-dioxane.

The compound is notable as a source of Ge(II), which contrasts with the pervasiveness of Ge(IV) compounds.

This dioxane complex represents a well-behaved form of germanium dichloride.

Germanium adopts an SF4-like shape with cis Cl ligands (Cl-Ge-Cl angle = 94.4°) and axial positions occupied by oxygen provided by a bridging dioxane.

[5][6] In organic synthesis, the complex is used as a Lewis acid with reducing properties.