Six-coordinate aluminium cations: Characterization, catalysis, and theory

Miguel Angel Munoz-Hernandez; Michael L. McKee; Timothy S. Keizer; Burl C. Yearwood; David A. Atwood

doi:10.1039/b106003c

Six-coordinate aluminium cations: Characterization, catalysis, and theory

Miguel Angel Munoz-Hernandez
, Michael L. McKee
, Timothy S. Keizer
, Burl C. Yearwood
, David A. Atwood

Chemistry

Producción científica: Article › revisión exhaustiva

54 Citas (Scopus)

Resumen

The new thf supported cations, [Salen(^tBu)Al(thf)₂]⁺ (2), [Salpen(^tBu)Al(thf)₂]⁺ (3), [Salben(^tBu)Al(thf)₂]⁺ (4) [Salophen(^tBu)Al(thf)₂]⁺ (5) and [Salomphen(^tBu)Al(thf)₂]⁺ (6), with BPh₄ ^- as the counter anion, have been prepared from salt elimination reactions with the respective Salen(^tBu)AlCl reagent, including one that is new, Salben(^tBu)AlCl (1). The cations were observed to polymerize propylene oxide. Based upon the results of experimental and theoretical work the mechanism appears to be one in which a carbocation is the propagating species although the PDI values are remarkably low, ≈1.2 in some cases. All of the potential catalysts were characterized spectroscopically and, in the case of 3, by X-ray crystallography.

Idioma original	English
Páginas (desde-hasta)	410-414
Número de páginas	5
Publicación	Journal of the Chemical Society, Dalton Transactions
Volumen	3
DOI	https://doi.org/10.1039/b106003c
Estado	Published - 2002

ASJC Scopus subject areas

General Chemistry

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title = "Six-coordinate aluminium cations: Characterization, catalysis, and theory",

abstract = "The new thf supported cations, [Salen(tBu)Al(thf)2]+ (2), [Salpen(tBu)Al(thf)2]+ (3), [Salben(tBu)Al(thf)2]+ (4) [Salophen(tBu)Al(thf)2]+ (5) and [Salomphen(tBu)Al(thf)2]+ (6), with BPh4 - as the counter anion, have been prepared from salt elimination reactions with the respective Salen(tBu)AlCl reagent, including one that is new, Salben(tBu)AlCl (1). The cations were observed to polymerize propylene oxide. Based upon the results of experimental and theoretical work the mechanism appears to be one in which a carbocation is the propagating species although the PDI values are remarkably low, ≈1.2 in some cases. All of the potential catalysts were characterized spectroscopically and, in the case of 3, by X-ray crystallography.",

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T2 - Characterization, catalysis, and theory

AU - Munoz-Hernandez, Miguel Angel

AU - McKee, Michael L.

AU - Keizer, Timothy S.

AU - Yearwood, Burl C.

AU - Atwood, David A.

PY - 2002

Y1 - 2002

N2 - The new thf supported cations, [Salen(tBu)Al(thf)2]+ (2), [Salpen(tBu)Al(thf)2]+ (3), [Salben(tBu)Al(thf)2]+ (4) [Salophen(tBu)Al(thf)2]+ (5) and [Salomphen(tBu)Al(thf)2]+ (6), with BPh4 - as the counter anion, have been prepared from salt elimination reactions with the respective Salen(tBu)AlCl reagent, including one that is new, Salben(tBu)AlCl (1). The cations were observed to polymerize propylene oxide. Based upon the results of experimental and theoretical work the mechanism appears to be one in which a carbocation is the propagating species although the PDI values are remarkably low, ≈1.2 in some cases. All of the potential catalysts were characterized spectroscopically and, in the case of 3, by X-ray crystallography.

AB - The new thf supported cations, [Salen(tBu)Al(thf)2]+ (2), [Salpen(tBu)Al(thf)2]+ (3), [Salben(tBu)Al(thf)2]+ (4) [Salophen(tBu)Al(thf)2]+ (5) and [Salomphen(tBu)Al(thf)2]+ (6), with BPh4 - as the counter anion, have been prepared from salt elimination reactions with the respective Salen(tBu)AlCl reagent, including one that is new, Salben(tBu)AlCl (1). The cations were observed to polymerize propylene oxide. Based upon the results of experimental and theoretical work the mechanism appears to be one in which a carbocation is the propagating species although the PDI values are remarkably low, ≈1.2 in some cases. All of the potential catalysts were characterized spectroscopically and, in the case of 3, by X-ray crystallography.

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U2 - 10.1039/b106003c

DO - 10.1039/b106003c

M3 - Article

AN - SCOPUS:0036007794

SN - 1470-479X

VL - 3

SP - 410

EP - 414

JO - Journal of the Chemical Society, Dalton Transactions

JF - Journal of the Chemical Society, Dalton Transactions

ER -

Six-coordinate aluminium cations: Characterization, catalysis, and theory

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