Abstract
The reaction of the O,N,N,O-type ligands, namely, 4,7-bis(4-R-phenyloxy)-2,9-(HOCR′2-CH2)2-1,10-phenanthrolines, LH2 (R = But (1–4), Me (5–8), R′ = Ph (1), R′R′ = -(CH2)5-(2, 5), R′ = Me (3, 6), CR′2 = adamantane-2,2-diyl (4, 7)), with an equimolar amount of trimethylaluminum afforded the corresponding aluminum complexes 8–14, which were characterized by NMR spectroscopy (1H, 13C) and elemental analysis. The NMR spectroscopy data showed that the coordination number of the aluminum atom in 8–14 is equal to five due to the formation of two intramolecular Al-N bonds. Complexes 8 and 12–14 were tested as initiators for the polymerization of ε-caprolactone in the presence of a co-initiator (benzyl alcohol). Complex 8 (R = But, R′ = Ph) demonstrated the highest activity, leading to the polymer with a high molecular weight.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 712–716, April, 2022.
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Mankaev, B.N., Agaeva, M.U., Egorov, M.P. et al. Aluminum complexes based on 1,10-phenanthroline-containing diols: synthesis and application as initiators of polymerization of ε-caprolactone. Russ Chem Bull 71, 712–716 (2022). https://doi.org/10.1007/s11172-022-3470-x
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DOI: https://doi.org/10.1007/s11172-022-3470-x