The reaction of N-heterocyclic carbene, L:, with BeCl2 quantitatively yields L:BeCl2 1 (L: = :C{N(2,6-(Pr2C6H3)-C-i)CH}(2)). The carbene-stabilized beryllium borohydride monomer L:Be(BH4)(2) 2 is prepared by the reaction of 1 with LiBH4. Compound 3, prepared by the reaction of 2 with Na-2[Fe(CO)(4)]center dot dioxane, represents an unusual "dual reduction" of the imidazole ring (i.e., hydroboration of the C=C backbone and hydrogenation of the C2 carbene center).