EMAIL THIS PAGE TO A FRIEND

Dalton transactions (Cambridge, England : 2003)

Synthesis of binuclear phenoxyimino organoaluminum complexes and their use as the catalyst precursors for efficient ring-opening polymerisation of ε-caprolactone.


PMID 23860908

Abstract

A series of novel binuclear phenoxyimino organoaluminum complexes of the type [(RN=CH)C6H3OAlMe2]2 [R = C6H5 (2a), 2,6-(i)Pr2C6H3 (2b), 2,6-Ph2C6H3 (2c), adamantyl (2d), (t)Bu (2e)] have been prepared in high yields, and these complexes were identified by (1)H, (13)C NMR and elemental analysis. Structural analysis for 2a-e revealed that these complexes have a distorted tetrahedral geometry around Al and both the Al-O and the Al-N bond distances were considerably influenced by substituents in the imino groups. The complexes were tested as catalyst precursors for ring-opening polymerisation (ROP) of ε-caprolactone (CL) in the presence of BnOH, and their catalytic activities were strongly affected by the catalyst structures and polymerisation conditions. An efficient living ROP has been achieved using the 2b/BnOH system.

Related Materials

Product #

Image

Description

Molecular Formula

Add to Cart

266523
Aluminum, ReagentPlus®, beads, 5-15 mm, 99.9% trace metals basis
Al
433705
Aluminum, evaporation slug, diam. × L 6.3 mm × 6.3 mm, 99.999% trace metals basis
Al
518573
Aluminum, granular, <1 mm, 99.7% trace metals basis
Al
266957
Aluminum, foil, thickness 1.0 mm, 99.999% trace metals basis
Al
266574
Aluminum, foil, thickness 0.45-0.55 mm, 99.999% trace metals basis
Al
326852
Aluminum, foil, thickness 0.25 mm, 99.999% trace metals basis
Al
326860
Aluminum, foil, thickness 0.13 mm, ≥99.99% trace metals basis
Al
653608
Aluminum, powder, <5 μm particle size, 99.5% trace metals basis
Al
326941
Aluminum, pellets, 3-8 mesh, ≥99.999% trace metals basis
Al
338788
Aluminum, pellets, 3-12 mm, 99.99% trace metals basis
Al
202584
Aluminum, powder, <75 μm, ≥99.95% trace metals basis
Al
266515
Aluminum, ≤30 μm, spherical powder, ≥99%
Al
202576
Aluminum, rod, diam. × L 3.0 mm × 100 mm, 99.999% trace metals basis
Al
310360
Aluminum, ACS reagent, 99%, wire, wire diam. ~1.5 mm
Al
266558
Aluminum, wire, diam. 1.0 mm, 99.999% trace metals basis
Al
326887
Aluminum, wire, diam. 0.58 mm, ≥99.99% trace metals basis
Al
IRMM523A
Aluminum, IRMM® certified Reference Material, 0.1 mm foil
Al
IRMM523B
Aluminum, IRMM® certified Reference Material, 1.0 mm foil
Al
IRMM523C
Aluminum, IRMM® certified Reference Material, 1.0 mm wire
Al
733369
Aluminum, foil, thickness 8 μm, 99% trace metals basis
Al