Acid activation of titanium alkoxide systems: structural characterisation of Ti(IV) sulfonyl-imide complexes

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Abstract

Treatment of [Ti((OPr)-Pr-i)(4)] with the sulfonyl-imine systems Tos(2)NH ([(p-Me-C6H4SO2)(2)NH]) and Tf2NH ([(CF3SO2)(2)NH]) results in the formation of the new Lewis acidic titanium sulfonyl-imide complexes [Ti((OPr)-Pr-i)(2)(O,O'-Tos(2)N)(2)] (1) and [Ti((OPr)-Pr-i)(2)((HOPr)-Pr-i)(2)(O-Tf2N)(2)] (2), respectively. The molecular structures of the complexes have been determined by single crystal X-ray diffraction. The reaction of [Ti((OPr)-Pr-i)(3)(OAr)] (Ar = 2,6-di-tert-butyl-4-methyl phenyl) with Tf2NH results in the formation of the dimeric complex [Ti((OPr)-Pr-i)(3)(O,O'-Tf2N)](2) (3), which has also been structurally characterised. The ability of the complexes to catalyst the Friedel-Crafts acylation of anisole has also been assessed.
Original languageEnglish
Pages (from-to)2209-2214
Number of pages6
JournalInorganica Chimica Acta
Volume363
Issue number10
DOIs
Publication statusPublished - 20 Jun 2010

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Imides
Acylation
Imines
imides
alkoxides
Titanium
Molecular structure
titanium
Chemical activation
Single crystals
activation
anisole
acylation
X ray diffraction
acids
Catalysts
Acids
imines
vehicles
molecular structure

Keywords

  • structure
  • catalysis
  • coordination
  • titanium
  • Lewis acid
  • alkoxide

Cite this

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title = "Acid activation of titanium alkoxide systems: structural characterisation of Ti(IV) sulfonyl-imide complexes",
abstract = "Treatment of [Ti((OPr)-Pr-i)(4)] with the sulfonyl-imine systems Tos(2)NH ([(p-Me-C6H4SO2)(2)NH]) and Tf2NH ([(CF3SO2)(2)NH]) results in the formation of the new Lewis acidic titanium sulfonyl-imide complexes [Ti((OPr)-Pr-i)(2)(O,O'-Tos(2)N)(2)] (1) and [Ti((OPr)-Pr-i)(2)((HOPr)-Pr-i)(2)(O-Tf2N)(2)] (2), respectively. The molecular structures of the complexes have been determined by single crystal X-ray diffraction. The reaction of [Ti((OPr)-Pr-i)(3)(OAr)] (Ar = 2,6-di-tert-butyl-4-methyl phenyl) with Tf2NH results in the formation of the dimeric complex [Ti((OPr)-Pr-i)(3)(O,O'-Tf2N)](2) (3), which has also been structurally characterised. The ability of the complexes to catalyst the Friedel-Crafts acylation of anisole has also been assessed.",
keywords = "structure, catalysis, coordination, titanium, Lewis acid, alkoxide",
author = "Andrew Johnson and Davidson, {Matthew G} and Jones, {Matthew D} and Lunn, {M D}",
year = "2010",
month = "6",
day = "20",
doi = "10.1016/j.ica.2010.03.027",
language = "English",
volume = "363",
pages = "2209--2214",
journal = "Inorganica Chimica Acta",
issn = "0020-1693",
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TY - JOUR

T1 - Acid activation of titanium alkoxide systems: structural characterisation of Ti(IV) sulfonyl-imide complexes

AU - Johnson, Andrew

AU - Davidson, Matthew G

AU - Jones, Matthew D

AU - Lunn, M D

PY - 2010/6/20

Y1 - 2010/6/20

N2 - Treatment of [Ti((OPr)-Pr-i)(4)] with the sulfonyl-imine systems Tos(2)NH ([(p-Me-C6H4SO2)(2)NH]) and Tf2NH ([(CF3SO2)(2)NH]) results in the formation of the new Lewis acidic titanium sulfonyl-imide complexes [Ti((OPr)-Pr-i)(2)(O,O'-Tos(2)N)(2)] (1) and [Ti((OPr)-Pr-i)(2)((HOPr)-Pr-i)(2)(O-Tf2N)(2)] (2), respectively. The molecular structures of the complexes have been determined by single crystal X-ray diffraction. The reaction of [Ti((OPr)-Pr-i)(3)(OAr)] (Ar = 2,6-di-tert-butyl-4-methyl phenyl) with Tf2NH results in the formation of the dimeric complex [Ti((OPr)-Pr-i)(3)(O,O'-Tf2N)](2) (3), which has also been structurally characterised. The ability of the complexes to catalyst the Friedel-Crafts acylation of anisole has also been assessed.

AB - Treatment of [Ti((OPr)-Pr-i)(4)] with the sulfonyl-imine systems Tos(2)NH ([(p-Me-C6H4SO2)(2)NH]) and Tf2NH ([(CF3SO2)(2)NH]) results in the formation of the new Lewis acidic titanium sulfonyl-imide complexes [Ti((OPr)-Pr-i)(2)(O,O'-Tos(2)N)(2)] (1) and [Ti((OPr)-Pr-i)(2)((HOPr)-Pr-i)(2)(O-Tf2N)(2)] (2), respectively. The molecular structures of the complexes have been determined by single crystal X-ray diffraction. The reaction of [Ti((OPr)-Pr-i)(3)(OAr)] (Ar = 2,6-di-tert-butyl-4-methyl phenyl) with Tf2NH results in the formation of the dimeric complex [Ti((OPr)-Pr-i)(3)(O,O'-Tf2N)](2) (3), which has also been structurally characterised. The ability of the complexes to catalyst the Friedel-Crafts acylation of anisole has also been assessed.

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KW - catalysis

KW - coordination

KW - titanium

KW - Lewis acid

KW - alkoxide

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