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Novel dirhodium coordination polymers: the impact of side chains on cyclopropanation

Liu, Jiquan and Xu, Yeping and Groszewicz, Pedro B. and Brodrecht, Martin and Fasel, Claudia and Hofmann, Kathrin and Tan, Xijuan and Gutmann, Torsten and Buntkowsky, Gerd (2018):
Novel dirhodium coordination polymers: the impact of side chains on cyclopropanation.
In: Catalysis Science & Technology, The Royal Society of Chemistry, pp. 5190-5200, 8, (20), ISSN 2044-4753,
DOI: 10.1039/c8cy01493k,
[Online-Edition: https://pubs.rsc.org/en/Content/ArticleLanding/2018/CY/C8CY0...],
[Article]

Abstract

Seven novel dirhodium coordination polymers (Rh2–Ln) (n = 1–7) are prepared by employing bitopic ligands to connect dirhodium nodes. The formation of the framework is confirmed by attenuated total reflectance Fourier transform infrared (ATR-FTIR) and 1H → 13C cross polarization magic angle spinning nuclear magnetic resonance (CP MAS NMR) spectroscopy. Defect sites resulting from incomplete ligand substitution are revealed by 19F MAS NMR. The random stacking behavior of the frameworks in the obtained solid is analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The Rh2/O interaction in neighboring layers is investigated by diffuse reflectance ultra-violet visible light (DR-UV-vis) spectroscopy and X-ray photoelectron spectroscopy (XPS). This interaction is relevant to understand the catalytic behavior of various Rh2–Ln catalysts in the cyclopropanation of styrene with ethyl diazoacetate (EDA). In this context, the structure-reactivity relationship is discussed by taking into consideration both interlayer Rh2/O interactions and steric effects of side chains.

Item Type: Article
Erschienen: 2018
Creators: Liu, Jiquan and Xu, Yeping and Groszewicz, Pedro B. and Brodrecht, Martin and Fasel, Claudia and Hofmann, Kathrin and Tan, Xijuan and Gutmann, Torsten and Buntkowsky, Gerd
Title: Novel dirhodium coordination polymers: the impact of side chains on cyclopropanation
Language: English
Abstract:

Seven novel dirhodium coordination polymers (Rh2–Ln) (n = 1–7) are prepared by employing bitopic ligands to connect dirhodium nodes. The formation of the framework is confirmed by attenuated total reflectance Fourier transform infrared (ATR-FTIR) and 1H → 13C cross polarization magic angle spinning nuclear magnetic resonance (CP MAS NMR) spectroscopy. Defect sites resulting from incomplete ligand substitution are revealed by 19F MAS NMR. The random stacking behavior of the frameworks in the obtained solid is analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The Rh2/O interaction in neighboring layers is investigated by diffuse reflectance ultra-violet visible light (DR-UV-vis) spectroscopy and X-ray photoelectron spectroscopy (XPS). This interaction is relevant to understand the catalytic behavior of various Rh2–Ln catalysts in the cyclopropanation of styrene with ethyl diazoacetate (EDA). In this context, the structure-reactivity relationship is discussed by taking into consideration both interlayer Rh2/O interactions and steric effects of side chains.

Journal or Publication Title: Catalysis Science & Technology
Volume: 8
Number: 20
Publisher: The Royal Society of Chemistry
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
LOEWE
LOEWE > LOEWE-Schwerpunkte
LOEWE > LOEWE-Schwerpunkte > iNAPO – ion conducting NAnoPOres
07 Department of Chemistry
07 Department of Chemistry > Physical Chemistry
Date Deposited: 26 Oct 2018 13:51
DOI: 10.1039/c8cy01493k
Official URL: https://pubs.rsc.org/en/Content/ArticleLanding/2018/CY/C8CY0...
Funders: German Research Foundation DFG: Bu 911/27-1, Hessen State Ministry of Higher Education, Research and the Arts: LOEWE iNAPO
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