摘要
A series of aluminum complexes featuring with the ketiminate ligand, OCMeCHCMeNHAr (Ar = 2,6-iPr2C6H3, 1), have been prepared and characterized spectroscopically and structurally. Reactions of 1 with trialkylaluminum in 1:1 or 1:2 molar ratio generate four- and five-coordinated aluminum complexes (OCMeCHCMeNAr)AlR2 (R = Me (2); R = Et (3)) and (OCMeCHCMeNAr)2AlR (R = Me (4); R = Et (5)) in high yields. Similarly, reaction of AlCl3 with 1 or 2 equiv of the lithiated 1 in toluene afforded bis(ketiminate) aluminum chloride complex, (OCMeCHCMeNAr)2AlCl (6) or (OCMeCHCMeNAr)AlCl2 (7). Surprisingly, reacting 6 with 1 equiv of AgBF4 in methylene/acetonitrile mixsolvents generates (OCMeCHCMeNAr)2AlF (8) in moderate yield. The structures of complexes 2-6 and 8 have been determined by X-ray crystallography. Complexes 2 and 3 both exhibit tetrahedron structures with the aluminum atom surrounded by oxygen and nitrogen atoms of chelating ketiminate and two alkyl groups. The mono- and bis-ketiminate aluminum complexes 2 - 5 have shown moderate activity toward the ring-opening polymerization of ε-caprolactone.
| 原文 | English |
|---|---|
| 頁（從 - 到） | 6450-6455 |
| 頁數 | 6 |
| 期刊 | Inorganic Chemistry |
| 卷 | 41 |
| 發行號 | 24 |
| DOIs | |
| 出版狀態 | Published - 2002 十二月 2 |
指紋
All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
- Inorganic Chemistry
引用此文
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Four- and five-coordinate aluminum ketiminate complexes : Synthesis, characterization, and ring-opening polymerization. / Yu, Ru Ching; Hung, Chen Hsiung; Huang, Jui Hsien; Lee, Horng Yi; Chen, Jwu Ting.
於: Inorganic Chemistry, 卷 41, 編號 24, 02.12.2002, p. 6450-6455.研究成果: Article
TY - JOUR
T1 - Four- and five-coordinate aluminum ketiminate complexes
T2 - Synthesis, characterization, and ring-opening polymerization
AU - Yu, Ru Ching
AU - Hung, Chen Hsiung
AU - Huang, Jui Hsien
AU - Lee, Horng Yi
AU - Chen, Jwu Ting
PY - 2002/12/2
Y1 - 2002/12/2
N2 - A series of aluminum complexes featuring with the ketiminate ligand, OCMeCHCMeNHAr (Ar = 2,6-iPr2C6H3, 1), have been prepared and characterized spectroscopically and structurally. Reactions of 1 with trialkylaluminum in 1:1 or 1:2 molar ratio generate four- and five-coordinated aluminum complexes (OCMeCHCMeNAr)AlR2 (R = Me (2); R = Et (3)) and (OCMeCHCMeNAr)2AlR (R = Me (4); R = Et (5)) in high yields. Similarly, reaction of AlCl3 with 1 or 2 equiv of the lithiated 1 in toluene afforded bis(ketiminate) aluminum chloride complex, (OCMeCHCMeNAr)2AlCl (6) or (OCMeCHCMeNAr)AlCl2 (7). Surprisingly, reacting 6 with 1 equiv of AgBF4 in methylene/acetonitrile mixsolvents generates (OCMeCHCMeNAr)2AlF (8) in moderate yield. The structures of complexes 2-6 and 8 have been determined by X-ray crystallography. Complexes 2 and 3 both exhibit tetrahedron structures with the aluminum atom surrounded by oxygen and nitrogen atoms of chelating ketiminate and two alkyl groups. The mono- and bis-ketiminate aluminum complexes 2 - 5 have shown moderate activity toward the ring-opening polymerization of ε-caprolactone.
AB - A series of aluminum complexes featuring with the ketiminate ligand, OCMeCHCMeNHAr (Ar = 2,6-iPr2C6H3, 1), have been prepared and characterized spectroscopically and structurally. Reactions of 1 with trialkylaluminum in 1:1 or 1:2 molar ratio generate four- and five-coordinated aluminum complexes (OCMeCHCMeNAr)AlR2 (R = Me (2); R = Et (3)) and (OCMeCHCMeNAr)2AlR (R = Me (4); R = Et (5)) in high yields. Similarly, reaction of AlCl3 with 1 or 2 equiv of the lithiated 1 in toluene afforded bis(ketiminate) aluminum chloride complex, (OCMeCHCMeNAr)2AlCl (6) or (OCMeCHCMeNAr)AlCl2 (7). Surprisingly, reacting 6 with 1 equiv of AgBF4 in methylene/acetonitrile mixsolvents generates (OCMeCHCMeNAr)2AlF (8) in moderate yield. The structures of complexes 2-6 and 8 have been determined by X-ray crystallography. Complexes 2 and 3 both exhibit tetrahedron structures with the aluminum atom surrounded by oxygen and nitrogen atoms of chelating ketiminate and two alkyl groups. The mono- and bis-ketiminate aluminum complexes 2 - 5 have shown moderate activity toward the ring-opening polymerization of ε-caprolactone.
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U2 - 10.1021/ic025785j
DO - 10.1021/ic025785j
M3 - Article
C2 - 12444790
AN - SCOPUS:0037010957
VL - 41
SP - 6450
EP - 6455
JO - Inorganic Chemistry
JF - Inorganic Chemistry
SN - 0020-1669
IS - 24
ER -