Synthesis and Structure of a Terminal Uranium Nitride Complex

2012/06/29 by David M. King, Floriana Tuna, Eric J. L. McInnes +4 · 4 citations
Chemistry · Materials Science · Medicine · #Lanthanide and Transition Metal Complexes #Radioactive element chemistry and processing #Radiopharmaceutical Chemistry and Applications

paper · doi:10.1126/science.1223488

openalex publication_date 2012/06/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/23

Abstract

The terminal uranium nitride linkage is a fundamental target in the study of f-orbital participation in metal-ligand multiple bonding but has previously eluded characterization in an isolable molecule. Here, we report the preparation of the terminal uranium(V) nitride complex [UN(Tren(TIPS))][Na(12-crown-4)(2)] in which Tren(TIPS) = [N(CH(2)CH(2)NSiPr(i)(3))(3)](3-) and Pr(i) = CH(CH(3))(2) by reaction of the uranium(III) complex [U(Tren(TIPS))] with sodium azide followed by abstraction and encapsulation of the sodium cation by the polydentate crown ether 12-crown-4. Single-crystal x-ray diffraction reveals a uranium-terminal nitride bond length of 1.825(15) angstroms (where 15 is the standard uncertainty). The structural assignment is supported by means of (15)N-isotopic labeling, electronic absorption spectroscopy, magnetometry, electronic structure calculations, elemental analyses, and liberation of ammonia after treatment with water.

Citations

• Density-functional approximation for the correlation energy of the inhomogeneous electron gas
• Sayago-- al otro lado de la leyenda
• Accurate spin-dependent electron liquid correlation energies for local spin density calculations: a critical analysis
• Uranium−Nitrogen Multiple Bonding: Isostructural Anionic, Neutral, and Cationic Uranium Nitride Complexes Featuring a Linear U═N═U Core
• Chemistry with ADF
• Carbon Dioxide Activation with Sterically Pressured Mid- and High-Valent Uranium Complexes
• Simple NUF3 and PUF3 Molecules with Triple Bonds to Uranium
• Uranium−Nitrogen Multiple Bonding: The Case of a Four-Coordinate Uranium(VI) Nitridoborate Complex
• A Nitrido‐Centered Uranium Azido Cluster Obtained from a Uranium Azide
• Uranium azide photolysis results in C–H bond activation and provides evidence for a terminal uranium nitride

Cited by

• Triamidoamine uranium(IV)–arsenic complexes containing one-, two- and threefold U–As bonding interactions
• Reductive assembly of cyclobutadienyl and diphosphacyclobutadienyl rings at uranium
• Isolation and characterization of a uranium(VI)–nitride triple bond
• Uranium nitrides [wikipedia]