Synthesis, reactivity, and structures of dialuminum complexes containing linked ketiminate ligands

Pei Chen Kuo, I. Chun Chen, Hon Man Lee, Cheng Hsiang Hung, Jui Hsien Huang

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Linked bis(ketimine) (1) can be prepared with the reaction of excess 2,4-pentanedione and 4,4′-methylene-bis(2,6-diisopropylaniline) in methanol in the presence of catalytic amount of formic acid. The dialuminum alkyl complexes containing the linked bis(ketiminate) dianionic ligands, [OC(Me)CHC(Me)N(2,6-iPr2C6H2-4) AlR2]2CH2 (2, R = Me; 3, R = Et), were prepared by a reaction of 2 equiv AlR3 with [OC(Me)CHC(Me)NH(2,6- iPr2C6H2-4)]2CH 2 in methylene chloride. Reactions of 2 with 2 and 4 equiv of I 2 gave corresponding aluminum iodo complexes 4 and 5, respectively. Treatment of 5 with 2 equiv of AgBF4, however, gave a diboron complex, [OC(Me)CHC(Me)N(2,6-iPr2C6H 2-4)BF2]2CH2 (6), in 18% isolated yield. All new complexes have been characterized by 1H and 13C NMR spectroscopy and complexes 2, 3, and 6 are also confirmed by X-ray diffraction.

Original languageEnglish
Pages (from-to)3761-3767
Number of pages7
JournalInorganica Chimica Acta
Volume358
Issue number13
DOIs
Publication statusPublished - 2005 Sep 1

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formic acid
Methylene Chloride
Formic acid
Dichloromethane
Aluminum
Nuclear magnetic resonance spectroscopy
Methanol
reactivity
Ligands
methylene
X ray diffraction
ligands
synthesis
methyl alcohol
chlorides
aluminum
nuclear magnetic resonance
diffraction
spectroscopy
acetylacetone

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

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title = "Synthesis, reactivity, and structures of dialuminum complexes containing linked ketiminate ligands",
abstract = "Linked bis(ketimine) (1) can be prepared with the reaction of excess 2,4-pentanedione and 4,4′-methylene-bis(2,6-diisopropylaniline) in methanol in the presence of catalytic amount of formic acid. The dialuminum alkyl complexes containing the linked bis(ketiminate) dianionic ligands, [OC(Me)CHC(Me)N(2,6-iPr2C6H2-4) AlR2]2CH2 (2, R = Me; 3, R = Et), were prepared by a reaction of 2 equiv AlR3 with [OC(Me)CHC(Me)NH(2,6- iPr2C6H2-4)]2CH 2 in methylene chloride. Reactions of 2 with 2 and 4 equiv of I 2 gave corresponding aluminum iodo complexes 4 and 5, respectively. Treatment of 5 with 2 equiv of AgBF4, however, gave a diboron complex, [OC(Me)CHC(Me)N(2,6-iPr2C6H 2-4)BF2]2CH2 (6), in 18{\%} isolated yield. All new complexes have been characterized by 1H and 13C NMR spectroscopy and complexes 2, 3, and 6 are also confirmed by X-ray diffraction.",
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Synthesis, reactivity, and structures of dialuminum complexes containing linked ketiminate ligands. / Kuo, Pei Chen; Chen, I. Chun; Lee, Hon Man; Hung, Cheng Hsiang; Huang, Jui Hsien.

In: Inorganica Chimica Acta, Vol. 358, No. 13, 01.09.2005, p. 3761-3767.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Synthesis, reactivity, and structures of dialuminum complexes containing linked ketiminate ligands

AU - Kuo, Pei Chen

AU - Chen, I. Chun

AU - Lee, Hon Man

AU - Hung, Cheng Hsiang

AU - Huang, Jui Hsien

PY - 2005/9/1

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N2 - Linked bis(ketimine) (1) can be prepared with the reaction of excess 2,4-pentanedione and 4,4′-methylene-bis(2,6-diisopropylaniline) in methanol in the presence of catalytic amount of formic acid. The dialuminum alkyl complexes containing the linked bis(ketiminate) dianionic ligands, [OC(Me)CHC(Me)N(2,6-iPr2C6H2-4) AlR2]2CH2 (2, R = Me; 3, R = Et), were prepared by a reaction of 2 equiv AlR3 with [OC(Me)CHC(Me)NH(2,6- iPr2C6H2-4)]2CH 2 in methylene chloride. Reactions of 2 with 2 and 4 equiv of I 2 gave corresponding aluminum iodo complexes 4 and 5, respectively. Treatment of 5 with 2 equiv of AgBF4, however, gave a diboron complex, [OC(Me)CHC(Me)N(2,6-iPr2C6H 2-4)BF2]2CH2 (6), in 18% isolated yield. All new complexes have been characterized by 1H and 13C NMR spectroscopy and complexes 2, 3, and 6 are also confirmed by X-ray diffraction.

AB - Linked bis(ketimine) (1) can be prepared with the reaction of excess 2,4-pentanedione and 4,4′-methylene-bis(2,6-diisopropylaniline) in methanol in the presence of catalytic amount of formic acid. The dialuminum alkyl complexes containing the linked bis(ketiminate) dianionic ligands, [OC(Me)CHC(Me)N(2,6-iPr2C6H2-4) AlR2]2CH2 (2, R = Me; 3, R = Et), were prepared by a reaction of 2 equiv AlR3 with [OC(Me)CHC(Me)NH(2,6- iPr2C6H2-4)]2CH 2 in methylene chloride. Reactions of 2 with 2 and 4 equiv of I 2 gave corresponding aluminum iodo complexes 4 and 5, respectively. Treatment of 5 with 2 equiv of AgBF4, however, gave a diboron complex, [OC(Me)CHC(Me)N(2,6-iPr2C6H 2-4)BF2]2CH2 (6), in 18% isolated yield. All new complexes have been characterized by 1H and 13C NMR spectroscopy and complexes 2, 3, and 6 are also confirmed by X-ray diffraction.

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