Synthesis of Trimethyltriazacyclohexane (Me3tach) Sandwich Complexes of Uranium, Neptunium, and Plutonium Triiodides: (Me3tach)2AnI3

Wedal, Justin C.; Murillo, Jesse; Ziller, Joseph W.; Scott, Brian Lindley; Gaunt, Andrew James; Evans, William J.

doi:10.1021/acs.inorgchem.2c03306

Synthesis of Trimethyltriazacyclohexane (Me₃tach) Sandwich Complexes of Uranium, Neptunium, and Plutonium Triiodides: (Me₃tach)₂AnI₃

Journal Article · Wed Dec 28 00:00:00 EST 2022 · Inorganic Chemistry

DOI:https://doi.org/10.1021/acs.inorgchem.2c03306· OSTI ID:1922797

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Univ. of California, Irvine, CA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

1,3,5-Trimethyl-1,3,5-triazacyclohexane (Me₃tach) readily complexes uranium triiodide to form (Me₃tach)₂UI₃. Further, the complex is soluble in THF and arenes and can function as a source of UI₃ to form organometallic U(III) complexes. When dissolved in pyridine (py), (Me3tach)2UI3 forms (Me₃tach)UI₃(py)₂. A related complex with the larger 1,4,7-trimethyl-1,4,7-triazacyclononane (Me₃tacn) ligand, namely (Me₃tacn)UI₃(THF), was synthesized for comparison. Since X-ray quality crystals of (Me₃tach)₂UI₃ can be synthesized in high yield even with small-scale reactions, the system is ideal for extension to transuranium elements. Accordingly, the neptunium and plutonium complexes (Me₃tach)₂NpI₃ and (Me₃tach)₂PuI₃ were synthesized in an analogous manner from NpI₃(THF)₄ and PuI₃(THF)₄, respectively.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division

Grant/Contract Number:: 89233218CNA000001; AC52-06NA25396; SC0004739

OSTI ID:: 1922797

Report Number(s):: LA-UR-22-29538

Journal Information:: Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 15 Vol. 62; ISSN 0020-1669

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Synthesis of Trimethyltriazacyclohexane (Me3tach) Sandwich Complexes of Uranium, Neptunium, and Plutonium Triiodides: (Me3tach)2AnI3

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Synthesis of Trimethyltriazacyclohexane (Me₃tach) Sandwich Complexes of Uranium, Neptunium, and Plutonium Triiodides: (Me₃tach)₂AnI₃