PtII and PdII complexes with a trans-chelating bis(pyridyl) ligand

Nan Wang; Theresa M. McCormick; Soo Byung Ko; Suning Wang

doi:10.1002/ejic.201200442

Pt^II and Pd^II complexes with a trans-chelating bis(pyridyl) ligand

Nan Wang, Theresa M. McCormick, Soo Byung Ko, Suning Wang^*

^*Corresponding author for this work

Queen's University Kingston

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

10 Citations (Scopus)

Abstract

An atropisomeric bis(pyridyl) chelate ligand bis{3,3'-[N-Ph-2-(2'-py) indolyl]} (bpib) has been found to readily form trans-chelating Pd^II and Pt^II complexes. Two such complexes, Pt(bpib)Cl₂ and Pd(bpib)Cl₂ have been isolated and their structures were determined by single-crystal X-ray diffraction analysis. Both Pt(bpib)Cl₂ and Pd(bpib)Cl₂ have a chiral structure with C₂ symmetry. Pt(bpib)Cl₂ displays a long-lived phosphorescence with λ_em = 595 nm in a frozen CH₂Cl₂ solution at 77 K. To examine the potential use of the trans chelate bpib ligand in oxidative coupling reactions catalysed by Pd^II compounds, acetoxylation of benzene, chlorobenzene and toluene by PhI(OAc)₂ using Pd(OAc)₂/bpib (2:1) as the catalyst was examined and compared with the cis-chelating system Pd(OAc)₂/2,2'-bipyridine (bipy). The bpib system was found to accelerate the reaction but lower the overall yield.

Original language	English
Pages (from-to)	4463-4469
Number of pages	7
Journal	European Journal of Inorganic Chemistry
Issue number	28
DOIs	https://doi.org/10.1002/ejic.201200442
Publication status	Published - Oct 2012
Externally published	Yes

Keywords

Chelates
Homogeneous catalysis
N ligands
Palladium
Platinum

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title = "PtII and PdII complexes with a trans-chelating bis(pyridyl) ligand",

abstract = "An atropisomeric bis(pyridyl) chelate ligand bis{3,3'-[N-Ph-2-(2'-py) indolyl]} (bpib) has been found to readily form trans-chelating PdII and PtII complexes. Two such complexes, Pt(bpib)Cl2 and Pd(bpib)Cl2 have been isolated and their structures were determined by single-crystal X-ray diffraction analysis. Both Pt(bpib)Cl2 and Pd(bpib)Cl2 have a chiral structure with C2 symmetry. Pt(bpib)Cl2 displays a long-lived phosphorescence with λem = 595 nm in a frozen CH2Cl2 solution at 77 K. To examine the potential use of the trans chelate bpib ligand in oxidative coupling reactions catalysed by PdII compounds, acetoxylation of benzene, chlorobenzene and toluene by PhI(OAc)2 using Pd(OAc)2/bpib (2:1) as the catalyst was examined and compared with the cis-chelating system Pd(OAc)2/2,2'-bipyridine (bipy). The bpib system was found to accelerate the reaction but lower the overall yield.",

keywords = "Chelates, Homogeneous catalysis, N ligands, Palladium, Platinum",

author = "Nan Wang and McCormick, {Theresa M.} and Ko, {Soo Byung} and Suning Wang",

year = "2012",

month = oct,

doi = "10.1002/ejic.201200442",

language = "English",

pages = "4463--4469",

journal = "European Journal of Inorganic Chemistry",

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T1 - PtII and PdII complexes with a trans-chelating bis(pyridyl) ligand

AU - Wang, Nan

AU - McCormick, Theresa M.

AU - Ko, Soo Byung

AU - Wang, Suning

PY - 2012/10

Y1 - 2012/10

N2 - An atropisomeric bis(pyridyl) chelate ligand bis{3,3'-[N-Ph-2-(2'-py) indolyl]} (bpib) has been found to readily form trans-chelating PdII and PtII complexes. Two such complexes, Pt(bpib)Cl2 and Pd(bpib)Cl2 have been isolated and their structures were determined by single-crystal X-ray diffraction analysis. Both Pt(bpib)Cl2 and Pd(bpib)Cl2 have a chiral structure with C2 symmetry. Pt(bpib)Cl2 displays a long-lived phosphorescence with λem = 595 nm in a frozen CH2Cl2 solution at 77 K. To examine the potential use of the trans chelate bpib ligand in oxidative coupling reactions catalysed by PdII compounds, acetoxylation of benzene, chlorobenzene and toluene by PhI(OAc)2 using Pd(OAc)2/bpib (2:1) as the catalyst was examined and compared with the cis-chelating system Pd(OAc)2/2,2'-bipyridine (bipy). The bpib system was found to accelerate the reaction but lower the overall yield.

AB - An atropisomeric bis(pyridyl) chelate ligand bis{3,3'-[N-Ph-2-(2'-py) indolyl]} (bpib) has been found to readily form trans-chelating PdII and PtII complexes. Two such complexes, Pt(bpib)Cl2 and Pd(bpib)Cl2 have been isolated and their structures were determined by single-crystal X-ray diffraction analysis. Both Pt(bpib)Cl2 and Pd(bpib)Cl2 have a chiral structure with C2 symmetry. Pt(bpib)Cl2 displays a long-lived phosphorescence with λem = 595 nm in a frozen CH2Cl2 solution at 77 K. To examine the potential use of the trans chelate bpib ligand in oxidative coupling reactions catalysed by PdII compounds, acetoxylation of benzene, chlorobenzene and toluene by PhI(OAc)2 using Pd(OAc)2/bpib (2:1) as the catalyst was examined and compared with the cis-chelating system Pd(OAc)2/2,2'-bipyridine (bipy). The bpib system was found to accelerate the reaction but lower the overall yield.

KW - Chelates

KW - Homogeneous catalysis

KW - N ligands

KW - Palladium

KW - Platinum

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DO - 10.1002/ejic.201200442

M3 - Article

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JO - European Journal of Inorganic Chemistry

JF - European Journal of Inorganic Chemistry

IS - 28

ER -

Pt^II and Pd^II complexes with a trans-chelating bis(pyridyl) ligand

Abstract

Keywords

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