In conclusion, we report the synthesis, characterisation and reactivity of a Mg2(n-Bu)2 complex, based on a new rigid, dinucleating ligand that enforces the Mg-centres in close proximity. Through a combination of computations and experiments we show that the dinuclear nature of such complexes render the butyl groups less reactive than their mononuclear analogues, partly due to delocalisation of their negative charge over two centres and partly due to the increased steric congestion and the absence of open coordination sites. We demonstrate that 1 reacts readily with coordinating substrates that can displace the THF ligands. Lastly, we report the RT dehydrogenation of amine-boranes at significantly lower temperatures than reported for related compounds which we ascribe to the rigidly enforced proximity of the Mg-centres. This work shows how the use of rigid dinucleating ligand environments enables the synthesis of robust dimagnesium complexes, and how the enforced close proximity alters the reactivity. Given the large role that organomagnesium reagents play in synthetic chemistry, we envision that these findings can aid in the development of new reagents for organomagnesium-aided synthetic strategies.