Abstract
PtRu5 (CO)13 (PBu3t) (μ3 - PhC2 H) (μ5 - C) (2) has been shown to be a catalyst precursor for the hydrogenation of PhC2H to styrene and ethylbenzene. Three new organometallic products have been found in the catalyst solutions. These are Ru5 (CO)12 (μ5 - C) [PtPBu3t] (μ3 - PhC2 H) (μ - H)2 (4), Pt (PBu3t) (PhC2 H) (CO) (5), and Ru5(CO)11(μ4-CCHCPh)(μ4-HC2Ph)(μ3-HC2Ph) (6). Compounds 4-6 have been synthesized independently and structurally characterized and each one has been tested independently for its ability to produce hydrogenation of PhC2H catalytically. Compound 4 contains an open square-pyramidal cluster of five ruthenium atoms with one platinum atom bridging an edge of the cluster. It is structurally related to 2 but contains one less CO ligand and two hydrido ligands formed by the addition of one equivalent of hydrogen to the metal cluster. It can be obtained directly from 2 by reaction with hydrogen in the presence of trimethylamine oxide. Compound 5 is a tricoordinated mononuclear platinum complex containing one PBu3t ligand, one CO ligand and one μ2-PhC2H ligand. Compound 5 can be obtained directly from Pt (PBu3t)2 by reaction with PhC2H under an atmosphere of CO. Compound 6 was obtained from the reaction of Ru5(CO)15(μ5-C) with PhC2H in the presence of UV-Vis irradiation. Compound 6 contains three equivalents of PhC2H; one is present as triply bridging PhC2H ligand; one is a quadruply bridging ligand; the third one has formed a bond to the carbido ligand in the center of the metal cluster to form a novel tetra-metallated allyl ligand. Compound 5 has the highest catalytic activity of all three compounds and is believed to be responsible for the vast majority of the catalytic hydrogenation produced from the solutions of 2. Compound 4 is transformed into 5 under the conditions of catalysis.
| Original language | English |
|---|---|
| Pages (from-to) | 3122-3128 |
| Number of pages | 7 |
| Journal | Journal of Organometallic Chemistry |
| Volume | 691 |
| Issue number | 14 |
| DOIs | |
| State | Published - Jul 1 2006 |
| Externally published | Yes |
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Keywords
- Cluster fragmentation
- Hydrogenation
- Platinum
- Ruthenium
ASJC Scopus subject areas
- Chemical Engineering (miscellaneous)
- Materials Science (miscellaneous)
- Materials Chemistry
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Biochemistry
Cite this
The importance of cluster fragmentation in the catalytic hydrogenation of phenylacetylene by PtRu5 carbonyl cluster complexes. / Adams, Richard D.; Captain, Burjor; Zhu, Lei.
In: Journal of Organometallic Chemistry, Vol. 691, No. 14, 01.07.2006, p. 3122-3128.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The importance of cluster fragmentation in the catalytic hydrogenation of phenylacetylene by PtRu5 carbonyl cluster complexes
AU - Adams, Richard D.
AU - Captain, Burjor
AU - Zhu, Lei
PY - 2006/7/1
Y1 - 2006/7/1
N2 - PtRu5 (CO)13 (PBu3t) (μ3 - PhC2 H) (μ5 - C) (2) has been shown to be a catalyst precursor for the hydrogenation of PhC2H to styrene and ethylbenzene. Three new organometallic products have been found in the catalyst solutions. These are Ru5 (CO)12 (μ5 - C) [PtPBu3t] (μ3 - PhC2 H) (μ - H)2 (4), Pt (PBu3t) (PhC2 H) (CO) (5), and Ru5(CO)11(μ4-CCHCPh)(μ4-HC2Ph)(μ3-HC2Ph) (6). Compounds 4-6 have been synthesized independently and structurally characterized and each one has been tested independently for its ability to produce hydrogenation of PhC2H catalytically. Compound 4 contains an open square-pyramidal cluster of five ruthenium atoms with one platinum atom bridging an edge of the cluster. It is structurally related to 2 but contains one less CO ligand and two hydrido ligands formed by the addition of one equivalent of hydrogen to the metal cluster. It can be obtained directly from 2 by reaction with hydrogen in the presence of trimethylamine oxide. Compound 5 is a tricoordinated mononuclear platinum complex containing one PBu3t ligand, one CO ligand and one μ2-PhC2H ligand. Compound 5 can be obtained directly from Pt (PBu3t)2 by reaction with PhC2H under an atmosphere of CO. Compound 6 was obtained from the reaction of Ru5(CO)15(μ5-C) with PhC2H in the presence of UV-Vis irradiation. Compound 6 contains three equivalents of PhC2H; one is present as triply bridging PhC2H ligand; one is a quadruply bridging ligand; the third one has formed a bond to the carbido ligand in the center of the metal cluster to form a novel tetra-metallated allyl ligand. Compound 5 has the highest catalytic activity of all three compounds and is believed to be responsible for the vast majority of the catalytic hydrogenation produced from the solutions of 2. Compound 4 is transformed into 5 under the conditions of catalysis.
AB - PtRu5 (CO)13 (PBu3t) (μ3 - PhC2 H) (μ5 - C) (2) has been shown to be a catalyst precursor for the hydrogenation of PhC2H to styrene and ethylbenzene. Three new organometallic products have been found in the catalyst solutions. These are Ru5 (CO)12 (μ5 - C) [PtPBu3t] (μ3 - PhC2 H) (μ - H)2 (4), Pt (PBu3t) (PhC2 H) (CO) (5), and Ru5(CO)11(μ4-CCHCPh)(μ4-HC2Ph)(μ3-HC2Ph) (6). Compounds 4-6 have been synthesized independently and structurally characterized and each one has been tested independently for its ability to produce hydrogenation of PhC2H catalytically. Compound 4 contains an open square-pyramidal cluster of five ruthenium atoms with one platinum atom bridging an edge of the cluster. It is structurally related to 2 but contains one less CO ligand and two hydrido ligands formed by the addition of one equivalent of hydrogen to the metal cluster. It can be obtained directly from 2 by reaction with hydrogen in the presence of trimethylamine oxide. Compound 5 is a tricoordinated mononuclear platinum complex containing one PBu3t ligand, one CO ligand and one μ2-PhC2H ligand. Compound 5 can be obtained directly from Pt (PBu3t)2 by reaction with PhC2H under an atmosphere of CO. Compound 6 was obtained from the reaction of Ru5(CO)15(μ5-C) with PhC2H in the presence of UV-Vis irradiation. Compound 6 contains three equivalents of PhC2H; one is present as triply bridging PhC2H ligand; one is a quadruply bridging ligand; the third one has formed a bond to the carbido ligand in the center of the metal cluster to form a novel tetra-metallated allyl ligand. Compound 5 has the highest catalytic activity of all three compounds and is believed to be responsible for the vast majority of the catalytic hydrogenation produced from the solutions of 2. Compound 4 is transformed into 5 under the conditions of catalysis.
KW - Cluster fragmentation
KW - Hydrogenation
KW - Platinum
KW - Ruthenium
UR - http://www.scopus.com/inward/record.url?scp=33745130345&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33745130345&partnerID=8YFLogxK
U2 - 10.1016/j.jorganchem.2005.12.041
DO - 10.1016/j.jorganchem.2005.12.041
M3 - Article
AN - SCOPUS:33745130345
VL - 691
SP - 3122
EP - 3128
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
SN - 0022-328X
IS - 14
ER -