Crystallographic Data. 177. Uranium Mononitride

Kempter, Charles P.; McGuire, Joseph C.; Nadler, Moshe

doi:10.1021/ac60145a601

Cited by 26 publications

(5 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A quadruply bridging nitrido ligand is included in the tetrahedron and binds the four uranium ions in an asymmetric mode with bond lengths ranging from 2.271(3) to 2.399 (5) . These values are close to that reported for six-coordinate uranium nitride (U À N = 2.444(9) ), [26] while a shorter U IV À (m 3 -N 3À ) bond length (2.15(3) ) was found for a trinuclear U IV complex containing a triply bridging nitrido ligand (m 3 -N 3À ) that was isolated from the reduction of azide by a U III (cyclopentadienyl) iodide species.…”

supporting

confidence: 87%

“…A quadruply bridging nitrido ligand is included in the tetrahe-dron and binds the four uranium ions in an asymmetric mode with bond lengths ranging from 2.271(3) to 2.399 (5) . These values are close to that reported for six-coordinate uranium nitride (U À N = 2.444(9) ), [26] while a shorter U IV À (m 3 -N 3À ) bond length (2.15(3) ) was found for a trinuclear U IV complex containing a triply bridging nitrido ligand (m 3 -N 3À ) that was isolated from the reduction of azide by a U III (cyclopentadienyl) iodide species. [15] N 3À -centered tetrahedra are found in the crystal structures of quaternary nitride tellurides of lanthanides prepared by a high-temperature, solid-state reaction; [27] the reported anisotropic thermal parameters are very similar to those found in the structure refinement of 3.…”

supporting

confidence: 87%

See 1 more Smart Citation

A Nitrido‐Centered Uranium Azido Cluster Obtained from a Uranium Azide

2008

View full text Add to dashboard Cite

Caught in the actinide: A tetranuclear azido/nitrido uranium anion containing eight end‐on bridging azido ligands and a μ4 interstitial nitrido ligand has been isolated and structurally characterized (see 1D chain; U green, Cs orange, I magenta, N blue, C white). A new two‐step procedure has been developed to promote the cluster assembly by oxidation of [UI3(thf)4] with a preformed uranium heptaazido complex.

show abstract

supporting

confidence: 87%

supporting

confidence: 87%

A Nitrido‐Centered Uranium Azido Cluster Obtained from a Uranium Azide

2008

View full text Add to dashboard Cite

show abstract

“…A quadruply bridging nitrido ligand is included in the tetrahedron and binds the four uranium ions in an asymmetric mode with bond lengths ranging from 2.271(3) to 2.399(5) Å. These values are close to that reported for six‐coordinate uranium nitride (UN=2.444(9) Å),26 while a shorter U IV (μ 3 ‐N 3− ) bond length (2.15(3) Å) was found for a trinuclear U IV complex containing a triply bridging nitrido ligand (μ 3 ‐N 3− ) that was isolated from the reduction of azide by a U III (cyclopentadienyl) iodide species 15. N 3− ‐centered tetrahedra are found in the crystal structures of quaternary nitride tellurides of lanthanides prepared by a high‐temperature, solid‐state reaction;27 the reported anisotropic thermal parameters are very similar to those found in the structure refinement of 3 .…”

supporting

confidence: 73%

Profiling the surfacome of Staphylococcus aureus

et al. 2010

View full text Add to dashboard Cite

Staphylococcus aureus is a widespread opportunistic pathogen that can cause a wide variety of life-threatening diseases. Especially for the colonization of human tissues and the development of invasiveness, surface-exposed proteins are of major importance. In the present studies, we optimized a proteolytic shaving approach to identify those surface-exposed protein domains - the surfacome - of S. aureus that are accessible to extracellular bio-macromolecules, for example in the host milieu. Subsequently, this approach was applied to define the surfacomes of four strains with different genetic backgrounds. This resulted in the identification of 96 different proteins. Surprisingly, the overlap between the surfacomes of the four different strains was below 10% and each strain displayed its own characteristic set of surface-exposed proteins. The data were also evaluated at the peptide level and here we observed a similar phenomenon. From 190 unique peptides only five were commonly found in the four strains. Besides well known cell wall proteins, we also identified some essential proteins, several yet uncharacterized exported proteins and predicted intracellular proteins. These results show for the first time that the cell surface of different S. aureus strains is not only highly variable, but also that the displayed proteins are very heterogeneous.

show abstract

“…A sequence of four of these UR 2 -N-UR 2 -NNN moieties (where R = cyclopentadienyl) forms the edges of a 24-membered uranium-nitrogen "molecular square." Uranium nitrides are generally obtained by reduction of a nitrogen-containing substrate, such as N 2 or NH 3 , with uranium reducing agents at high temperatures and pressures [37]. Several 24-membered uranium nitrogen rings (UNUN 3 ) 4 have been synthesized by reduction of sodium azide with organometallic metallocene derivatives.…”

Section: Novel Uranium-nitrogen Compoundsmentioning

confidence: 99%