Collect. Czech. Chem. Commun. 1979, 44, 2772-2779

Contribution to the structure of aluminium caprolactamate based on the study of infrared and proton magnetic resonance spectra

Otomar Kříž and Bohuslav Čásenský

Institute of Inorganic Chemistry, Czechoslovak Academy of Sciences, 250 68 Řež


Aluminium caprolactamate (I) was prepared by the reaction of ε-caprolactam with isopropyliminoalane (II) in benzene. IR and 1H-NMR spectra of I in various solvents are described as well as low-temperature 1H-NMR spectra in hexane and dichlormethane. On the basis of these results together with the determination of molecular weights, structural arrangement was proposed for the dimer of I containing an eight-membered ring formed by two -O-C-N-bridges between aluminium atoms and two caprolactam ligands on each aluminium atom bonded through oxygen atom of carbonyl.