NEt₃ adducts to BeCl₂, BeBr₂ and BeI₂ were synthesized and characterised via NMR and IR spectroscopy as well as X-ray diffractometry. Depending on the halide and the state of matter these are either mono- or dinuclear. Population analyses were performed to determine the influence of the metal's partial charge on the coordination geometry. Additionally, the reactivity of these compounds towards C–Cl- and O–H-bonds was studied.