Flux Synthesis of a Metal Carbide Hydride Using Anthracene As a Reactant

Tate O. Engstrand; Emily M. Cope; Guillermo Vasquez; Jo W. Haddock; Mary B. Hertz; Xiaoping Wang; Susan E. Latturner

doi:10.1021/acs.inorgchem.0c01505

Flux Synthesis of a Metal Carbide Hydride Using Anthracene As a Reactant

Tate O. Engstrand, Emily M. Cope, Guillermo Vasquez, Jo W. Haddock, Mary B. Hertz, Xiaoping Wang, Susan E. Latturner

Single Crystal Diffraction

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Abstract

La15(FeC6)4H was synthesized from the reaction of iron and anthracene in La/Ni eutectic flux. Anthracene was the source of both the carbon and hydrogen in the product. The structure of this metal carbide hydride features hydride ions in tetrahedral interstitial sites surrounded by lanthanum ions, which was confirmed by single-crystal neutron diffraction studies. The trigonal planar FeC6 units in which the central iron atom is coordinated by three ethylenide groups are similar to those found in La3.67FeC6, a previously reported compound that is formed in the absence of a hydride source. Magnetic susceptibility data confirm that the iron sites do not have magnetic moments. Density of states calculations indicate that La15(FeC6)4H is metallic and is stabilized by the incorporation of hydride anions.

Original language	English
Pages (from-to)	11651-11657
Number of pages	7
Journal	Inorganic Chemistry
Volume	59
Issue number	16
DOIs	https://doi.org/10.1021/acs.inorgchem.0c01505
State	Published - Aug 17 2020

Funding

This research was supported by the Division of Materials Research of the National Science Foundation (DMR-18-08471). This work made use of scanning electron microscope equipment of the Biological Sciences Imaging Resource (BSIR) in the Florida State University Department of Biology; we thank Dr. Eric Lochner for guidance with this instrument. A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by Oak Ridge National Laboratory.

Funders	Funder number
National Science Foundation	1808471, DMR-18-08471
Division of Materials Research

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10.1021/acs.inorgchem.0c01505

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title = "Flux Synthesis of a Metal Carbide Hydride Using Anthracene As a Reactant",

abstract = "La15(FeC6)4H was synthesized from the reaction of iron and anthracene in La/Ni eutectic flux. Anthracene was the source of both the carbon and hydrogen in the product. The structure of this metal carbide hydride features hydride ions in tetrahedral interstitial sites surrounded by lanthanum ions, which was confirmed by single-crystal neutron diffraction studies. The trigonal planar FeC6 units in which the central iron atom is coordinated by three ethylenide groups are similar to those found in La3.67FeC6, a previously reported compound that is formed in the absence of a hydride source. Magnetic susceptibility data confirm that the iron sites do not have magnetic moments. Density of states calculations indicate that La15(FeC6)4H is metallic and is stabilized by the incorporation of hydride anions.",

author = "Engstrand, {Tate O.} and Cope, {Emily M.} and Guillermo Vasquez and Haddock, {Jo W.} and Hertz, {Mary B.} and Xiaoping Wang and Latturner, {Susan E.}",

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AU - Engstrand, Tate O.

AU - Cope, Emily M.

AU - Vasquez, Guillermo

AU - Haddock, Jo W.

AU - Hertz, Mary B.

AU - Wang, Xiaoping

AU - Latturner, Susan E.

PY - 2020/8/17

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AB - La15(FeC6)4H was synthesized from the reaction of iron and anthracene in La/Ni eutectic flux. Anthracene was the source of both the carbon and hydrogen in the product. The structure of this metal carbide hydride features hydride ions in tetrahedral interstitial sites surrounded by lanthanum ions, which was confirmed by single-crystal neutron diffraction studies. The trigonal planar FeC6 units in which the central iron atom is coordinated by three ethylenide groups are similar to those found in La3.67FeC6, a previously reported compound that is formed in the absence of a hydride source. Magnetic susceptibility data confirm that the iron sites do not have magnetic moments. Density of states calculations indicate that La15(FeC6)4H is metallic and is stabilized by the incorporation of hydride anions.

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Flux Synthesis of a Metal Carbide Hydride Using Anthracene As a Reactant

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