Ferrocenyl(dimethyl)aluminum dimer [(η5-C5H5)Fe(η5-C5H4)AlMe2]2

Synthesis, Characterization and Reactivity of Dinuclear and Trinuclear Aluminum‐Bridged Ferrocenophanes

“…This is in the region typical of bridging Al-C(fc)-Al groups. [8] Hence, this strongly supports fast exchange of the central aluminum between all four C 1 (fc) carbon atoms in order to relieve this aluminum atom from electronic and coordinative strain, as indicated in the formula for 4. Considering the solution-state structure of 4, it was tempting to offer another nucleophile such as a carbanion to the central aluminum.…”

“…The re-sulting mixture contained 4b together with Et 3 Al, Et 3 Al(py) and several unidentified side products ( 1 H and 13 C NMR). The brown oil thus obtained was washed with hexane (2 mL), and the orange solid after removal of the hexane was dried in vacuo to give 108 mg of 4b (about 50 %) together with Et 3 Al(py) and Et 3 8 ]toluene (1.5 mL). Solid materials were separated by centrifugation, the supernatant liquid phase was collected and volatile materials were removed in vacuo.…”

1,1′‐Disubstituted Ferrocenes with Aluminum: Dinuclear and Trinuclear Dialumina[1.1]ferrocenophanes as Pyridine Adducts

“…Considering the successful strategy leading to dialkyl(ferrocenyl)aluminum compounds,9 when we prepared the pyridine adducts FcAlR 2 (py),9,10 we optimized the conditions for the reaction of 1,1′‐dilithioferrocene(tmeda)20 with dialkylaluminum chlorides R 2 AlCl [R = Me ( a ), Et ( b )] in the presence of pyridine to obtain the desired 1,1′‐ferrocenediyl derivatives fc(AlR 2 ) 2 (py) 2 1a and 1b (Scheme ). Apparently, these reactions depend critically on conditions, as, for example, G 15 and H 16 were obtained from the same starting materials, however, without pyridine under different conditions.…”

“…In this context, ferrocenylaluminum compounds have also been somewhat neglected 8. Thus, the first dialkyl(ferrocenyl)alanes, (Fc‐AlR 2 ) 2 , were described only recently, and the molecular structure was determined for (Fc‐AlMe 2 ) 2 9. This is also true for tri(ferrocenyl)aluminum, Fc 3 Al, which was isolated and characterized as its pyridine adduct 10.…”

Structurally Defined Zincated and Aluminated Complexes of Ferrocene Made by Alkali-Metal Synergistic Syntheses

“…ChemDraw representations of a selection of crystallographically characterized aluminated ferrocene molecules. References: G , H , I , J , K , L , M , N , O , P , Q …”