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Synthesis and Characterization of β ‐Diketiminate Aluminum Compounds and Their Use in the Ring‐Opening Polymerization of ε ‐Caprolactone
Author(s) -
Ma Xiaoli,
Yao Miaomiao,
Zhong Mingdong,
Deng Ziyan,
Li Wenling,
Yang Zhi,
Roesky Herbert W.
Publication year - 2017
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201600396
Subject(s) - chemistry , polymerization , alkyl , ring opening polymerization , ring (chemistry) , nuclear magnetic resonance spectroscopy , stereochemistry , aluminium , polymer chemistry , medicinal chemistry , polymer , organic chemistry
Four aluminum alkyl compounds, [CH{(CH 3 )CN‐2,4,6‐MeC 6 H 2 } 2 AlMe 2 ] ( 1 ), [CH{(CH 3 )CN‐2,4,6‐MeC 6 H 2 } 2 AlEt 2 ] ( 2 ), [CH{(CH 3 )CN‐2‐ i PrC 6 H 4 } 2 AlMe 2 ] ( 3 ), and [CH{(CH 3 )CN‐2‐ i PrC 6 H 4 } 2 AlEt 2 ] ( 4 ), bearing β ‐diketiminate ligands [CH{(Me)CN‐2,4,6‐MeC 6 H 2 }] 2 (L 1 H) and [CH{(Me)CN‐2‐ i PrC 6 H 4 }] 2 (L 2 H) were obtained from the reactions of trimethylaluminum, triethylaluminum with the corresponding β ‐diketiminate, respectively. All compounds were characterized by 1 H NMR and 13 C NMR spectroscopy, single‐crystal X‐ray structural analysis, and elemental analysis. Compounds 1 – 4 were found to catalyze the ring‐opening polymerization (ROP) of ε ‐caprolactone ( ε ‐CL) with good activity.