Butene Isomerization Catalyzed by Triosmium Clusters Anchored to Polymers Functionalized with -OH Groups

Liéto, J.; Procházka, M.; Arnold, D.B.; Gates, B. C.

doi:10.1016/0304-5102(85)85076-8

Cited by 12 publications

(1 citation statement)

References 11 publications

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“…Supporting metal clusters on polymers has also attracted significant interest, with supported species catalytically active for ethylene hydrogenation. 2 While clusters have been stabilized by aminated polymers as ion pairs of cluster anions and ammonium cations, [3][4][5][6][7][8][9] almost all studies have examined coordinating metal clusters to prefunctionalized polymers, mainly through P-linkages, [10][11][12][13] but also via O- 14 C-, [15][16][17] and N-interactions. 18 Polymer supports of this type certainly afford greater structural control than is possible with inorganic oxide supports, but problems arise due to polycoordination, 19 resulting in a mixture of mono-and polysubstituted clusters, together with noncoordinated polymer bound ligands attached to the backbone.…”

Section: Introductionmentioning

confidence: 99%

Mixed-Metal Cluster Chemistry. 16. Syntheses of Oligourethanes Containing Clusters in the Backbone

2001

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Bis(hydroxyalkylcyclopentadienyl)-containing mixed molybdenum-iridium clusters Mo2Ir2-(CO)10{η-C5H4(CH2)xOH}2 [x ) 2 (1), 10] react with alkyl or aryl 1,ω-diisocyanates OCNRNCO [R ) (CH2)y (y ) 4, 6, 12), trans-1,4-cyclohexyl, or 4-C6H4CH2-4-C6H4] to form oligourethanes with transition metal clusters in the oligomer backbone. Characterization of the cluster-containing oligourethanes is aided by spectral comparison with model cluster diurethanes Mo2Ir2 6), 6, 12], trans-1,4-cyclohexyl] prepared from reaction between the cluster diol 1 and alkyl isocyanates HRNCO. The precursor diol cluster 1 and cluster diurethane 6 have been characterized by single-crystal X-ray diffraction studies. The extent of polymerization has been assessed by gel permeation chromatography, with little dependence on diisocyanate precursor linker R but strong dependence on alkylcyclopentadienyl linker length (CH 2)x, suggesting that the steric influence of the bulky dimolybdenum-diiridium cluster core and co-ligands is the most important factor governing extent of polymerization. Supporting this assessment, the considerably more sterically hindered precursor 2-butyn-1,4-diolsubstituted cluster Mo2Ir2{µ4-η 2 -C2(CH2OH)2}(CO)8(η-C5H5)2 fails to react to any significant extent with 1,6-diisocyanatohexane.

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Section: Introductionmentioning

confidence: 99%

Mixed-Metal Cluster Chemistry. 16. Syntheses of Oligourethanes Containing Clusters in the Backbone

2001

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Heterogenized Homogeneous Catalysts

Bekturov¹,

Kudaibergenov²

1997

Catalysis by Polymers

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Metallclusterverbindungen  Chemie und Bedeutung; Homogene und heterogene Katalyse

Walther

1989

Zeitschrift fuer Chemie

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The interest in transition metal cluster catalysis has developed tremendously over the past decade because of the potential benefits metal cluster compounds may provide over traditional catalysts. Although these expectations have not been met yet transition metol cluster catalysis has offered many insights into the phenomenon of catalgsis and still remains the most important driving ,force of the metal cluster chemistry. This part of the review on transition metal cluster compounds deals with the homogeneous and heterogeneous catalysis by such compounds. Hydrido-alkenyl-Cluster abreagieren kann. OEt I , H 2 J E t OOC -CH2-C H 2 -COOEt / \ 0 s -\ /"' TI : 0 s O&-Os / \ ' H ' Z . Cliein. 29. .lg. (1989) lIe/t 4 Erhalt des Ru,-Clustergeriistes vor, Zyklus (7) (Schema 2).

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Butene Isomerization Catalyzed by Triosmium Clusters Anchored to Polymers Functionalized with -OH Groups

Cited by 12 publications

References 11 publications

Mixed-Metal Cluster Chemistry. 16. Syntheses of Oligourethanes Containing Clusters in the Backbone

Mixed-Metal Cluster Chemistry. 16. Syntheses of Oligourethanes Containing Clusters in the Backbone

Heterogenized Homogeneous Catalysts

Metallclusterverbindungen  Chemie und Bedeutung; Homogene und heterogene Katalyse

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