Triosmium Carbonyl Clusters with Two Different Diphosphine Ligands PDF Download
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Author: Emily R. Mikeska
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Languages : en
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Hundreds of triosmium carbonyl complexes containing bidentate phosphine ligands have been reported, but very few have involved more than one type of diphosphine ligand. Using microwave heating, we have investigated the reactivity of Os3(CO)12 with the two diphosphines bis(diphenylphosphino)methane (dppm) and 1,2-bis(diphenylphosphino)ethane (dppe). Four new osmium carbonyl complexes have been isolated and characterized by X-ray crystallographic analysis: Os3(CO)8(u00b5-dppe)(u03ba2-dppe) (1), Os3(CO)8(u00b5-dppe)(u03ba2-dppm) (2), [Os3(CO)9(u00b5-dppm)]2(u00b5-dppe) (3), and [Os3(CO)9(u00b5-dppe)]2(u00b5-dppe) (4). Complexes 1 and 2 are the first known examples of triosmium clusters containing diphosphine ligands that exhibit both bridging and chelating bonding modes in the same molecule. Complexes 2 and 3 are the first examples of triosmium clusters containing both dppm and dppe ligands in the same molecule. In complexes 3 and 4, two triangular Os3 units containing a diphosphine ligand are held together by a third bridging diphosphine ligand. We will present details of the syntheses of these new compounds and compare their structural features.
Author: Emily R. Mikeska
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Languages : en
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Book Description
Hundreds of triosmium carbonyl complexes containing bidentate phosphine ligands have been reported, but very few have involved more than one type of diphosphine ligand. Using microwave heating, we have investigated the reactivity of Os3(CO)12 with the two diphosphines bis(diphenylphosphino)methane (dppm) and 1,2-bis(diphenylphosphino)ethane (dppe). Four new osmium carbonyl complexes have been isolated and characterized by X-ray crystallographic analysis: Os3(CO)8(u00b5-dppe)(u03ba2-dppe) (1), Os3(CO)8(u00b5-dppe)(u03ba2-dppm) (2), [Os3(CO)9(u00b5-dppm)]2(u00b5-dppe) (3), and [Os3(CO)9(u00b5-dppe)]2(u00b5-dppe) (4). Complexes 1 and 2 are the first known examples of triosmium clusters containing diphosphine ligands that exhibit both bridging and chelating bonding modes in the same molecule. Complexes 2 and 3 are the first examples of triosmium clusters containing both dppm and dppe ligands in the same molecule. In complexes 3 and 4, two triangular Os3 units containing a diphosphine ligand are held together by a third bridging diphosphine ligand. We will present details of the syntheses of these new compounds and compare their structural features.
Author: 李兆銘
Publisher: Open Dissertation Press
ISBN: 9781374810983
Category :
Languages : en
Pages :
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This dissertation, "The Chemistry of Triosmium Carbonyl Clusters Containing Oxygen and Sulphur Donor Ligands" by 李兆銘, Siu-ming, Lee, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b4389375 Subjects: Carbonyl compounds Ligands
Author: Siu-ming Lee
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ISBN:
Category : Carbonyl compounds
Languages : en
Pages : 436
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Author:
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ISBN:
Category : Carbonyl compounds
Languages : en
Pages : 138
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Author: 黃維揚
Publisher: Open Dissertation Press
ISBN: 9781374763524
Category : Science
Languages : en
Pages : 360
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This dissertation, "The Chemistry of Triosmium Alkylidyne Carbonyl Clusters" by 黃維揚, Wai-yeung, Wong, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3123453 Subjects: Carbonyl compounds - Synthesis Ligands Organometallic compounds
Author: Wai-yeung Wong
Publisher:
ISBN:
Category : Carbonyl compounds
Languages : en
Pages : 686
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Author: Robert Edward Sommerhalter
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Category : Metal clusters
Languages : en
Pages : 96
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With the goal of developing systematic syntheses of linked triosmium carbonyl clusters, we report the substitution reactions of the dibridged cluster Os3(CO)10(μ2-OEt)2 with the bifunctional ligand 1,5-pentanediol. Reaction of Os3(CO)10(μ2-OEt)2 with 1,5-pentanediol affords the cluster Os3(CO)10(μ2O(CH2)5OH)2 as the major product. Over extended reaction periods, quantitative conversion to the cluster H4Os4(CO)12 is observed. Linking of two triosmium carbonyl clusters via the 1,5-pentanediol bridging ligands has been achieved in the reaction of Os3(CO)10(μ2-O(CH2)5OH)2 with one molar equivalent of Os3(CO)10(μ2-OEt)2. A secondary product of this reaction has been characterized spectroscopically and is believed to be an intermediate in the formation of H4Os4(CO)12. A synthetic route to Os3(CO)10(μ2-OEt)2 via di-halogenated cluster intermediate Os3(CO)12X2 or Os3(CO)10(μ2-X)2 (X = Cl, Br, I) is also reported.
Author: William R. Cullen
Publisher:
ISBN:
Category :
Languages : en
Pages : 346
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Author: Karen M. Waltz
Publisher:
ISBN:
Category : Metal carbonyls
Languages : en
Pages : 106
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Author: Guanmin Wu
Publisher:
ISBN:
Category : Carbonyl compounds
Languages : en
Pages : 177
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