EXAFS characterization and spectroscopic FT-IR studies of the reactions of the surface species formed upon adsorption or Ir<inf>2</inf>(η-Cl)<inf>2</inf>(COD)<inf>2</inf> on γ-alumina

P. Esteban; J. Real; J. C. Bayón; H. Dexpert; D. Bazin; G. Maire

doi:10.1016/0022-328X(88)80679-X

EXAFS characterization and spectroscopic FT-IR studies of the reactions of the surface species formed upon adsorption or Ir<inf>2</inf>(η-Cl)<inf>2</inf>(COD)<inf>2</inf> on γ-alumina

P. Esteban, J. Real, J. C. Bayón, H. Dexpert, D. Bazin, G. Maire

Department of Chemistry

Research output: Contribution to journal › Article › Research › peer-review

2 Citations (Scopus)

Abstract

The adsorption of Ir2(η-Cl)2(COD)2 (1) (COD = cyclooctadiene) on alumina has been studied by EXAFS at the LIII edge of Ir. The reactions of the surface complex formed upon adsorption of 1, with CO and PPh3 have been investigated by FT-IR spectroscopy. The attachment of 1 on γ-alumina involves the replacement of the bridging chloride ligands by aluminato groups of the support, to form a dimeric surface complex formulated as Ir2(η-O-alumina)2(COD)2. The room temperature reaction of this species with CO gives Ir2(CO)4(η-O-alumina)2. This tetracarbonyl surface species reacts at room temperature with PPh3, to give trans-Ir2(η-O-alumina)2 (CO)2(PPh32. These new surface complexes have considerable potential as precursors for modified iridium-based reforming catalysts. © 1988.

Original language	English
Pages (from-to)	113-123
Journal	Journal of Organometallic Chemistry
Volume	356
Issue number	1
DOIs	https://doi.org/10.1016/0022-328X(88)80679-X
Publication status	Published - 15 Nov 1988

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@article{ae477e0bb02642aa8af70b25ae203f82,

title = "EXAFS characterization and spectroscopic FT-IR studies of the reactions of the surface species formed upon adsorption or Ir2(η-Cl)2(COD)2 on γ-alumina",

abstract = "The adsorption of Ir2(η-Cl)2(COD)2 (1) (COD = cyclooctadiene) on alumina has been studied by EXAFS at the LIII edge of Ir. The reactions of the surface complex formed upon adsorption of 1, with CO and PPh3 have been investigated by FT-IR spectroscopy. The attachment of 1 on γ-alumina involves the replacement of the bridging chloride ligands by aluminato groups of the support, to form a dimeric surface complex formulated as Ir2(η-O-alumina)2(COD)2. The room temperature reaction of this species with CO gives Ir2(CO)4(η-O-alumina)2. This tetracarbonyl surface species reacts at room temperature with PPh3, to give trans-Ir2(η-O-alumina)2 (CO)2(PPh32. These new surface complexes have considerable potential as precursors for modified iridium-based reforming catalysts. {\textcopyright} 1988.",

author = "P. Esteban and J. Real and Bay{\'o}n, {J. C.} and H. Dexpert and D. Bazin and G. Maire",

year = "1988",

month = nov,

day = "15",

doi = "10.1016/0022-328X(88)80679-X",

language = "English",

volume = "356",

pages = "113--123",

number = "1",

}

Esteban, P, Real, J, Bayón, JC, Dexpert, H, Bazin, D & Maire, G 1988, 'EXAFS characterization and spectroscopic FT-IR studies of the reactions of the surface species formed upon adsorption or Ir<inf>2</inf>(η-Cl)<inf>2</inf>(COD)<inf>2</inf> on γ-alumina', Journal of Organometallic Chemistry, vol. 356, no. 1, pp. 113-123. https://doi.org/10.1016/0022-328X(88)80679-X

EXAFS characterization and spectroscopic FT-IR studies of the reactions of the surface species formed upon adsorption or Ir<inf>2</inf>(η-Cl)<inf>2</inf>(COD)<inf>2</inf> on γ-alumina. / Esteban, P.; Real, J.; Bayón, J. C.; Dexpert, H.; Bazin, D.; Maire, G.

In: Journal of Organometallic Chemistry, Vol. 356, No. 1, 15.11.1988, p. 113-123.

Research output: Contribution to journal › Article › Research › peer-review

TY - JOUR

T1 - EXAFS characterization and spectroscopic FT-IR studies of the reactions of the surface species formed upon adsorption or Ir2(η-Cl)2(COD)2 on γ-alumina

AU - Esteban, P.

AU - Real, J.

AU - Bayón, J. C.

AU - Dexpert, H.

AU - Bazin, D.

AU - Maire, G.

PY - 1988/11/15

Y1 - 1988/11/15

N2 - The adsorption of Ir2(η-Cl)2(COD)2 (1) (COD = cyclooctadiene) on alumina has been studied by EXAFS at the LIII edge of Ir. The reactions of the surface complex formed upon adsorption of 1, with CO and PPh3 have been investigated by FT-IR spectroscopy. The attachment of 1 on γ-alumina involves the replacement of the bridging chloride ligands by aluminato groups of the support, to form a dimeric surface complex formulated as Ir2(η-O-alumina)2(COD)2. The room temperature reaction of this species with CO gives Ir2(CO)4(η-O-alumina)2. This tetracarbonyl surface species reacts at room temperature with PPh3, to give trans-Ir2(η-O-alumina)2 (CO)2(PPh32. These new surface complexes have considerable potential as precursors for modified iridium-based reforming catalysts. © 1988.

AB - The adsorption of Ir2(η-Cl)2(COD)2 (1) (COD = cyclooctadiene) on alumina has been studied by EXAFS at the LIII edge of Ir. The reactions of the surface complex formed upon adsorption of 1, with CO and PPh3 have been investigated by FT-IR spectroscopy. The attachment of 1 on γ-alumina involves the replacement of the bridging chloride ligands by aluminato groups of the support, to form a dimeric surface complex formulated as Ir2(η-O-alumina)2(COD)2. The room temperature reaction of this species with CO gives Ir2(CO)4(η-O-alumina)2. This tetracarbonyl surface species reacts at room temperature with PPh3, to give trans-Ir2(η-O-alumina)2 (CO)2(PPh32. These new surface complexes have considerable potential as precursors for modified iridium-based reforming catalysts. © 1988.

U2 - 10.1016/0022-328X(88)80679-X

DO - 10.1016/0022-328X(88)80679-X

M3 - Article

VL - 356

SP - 113

EP - 123

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