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Title: Uranyl Naphthylsalophen and Pyrasal Complexes: Oxo Ligands Acting as Hydrogen Bond Acceptors in the Solid State

Journal Article · · Inorganic Chemistry
ORCiD logo [1]; ORCiD logo [2];  [3];  [3]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [3]
  1. Texas Tech Univ., Lubbock, TX (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  2. Texas Tech Univ., Lubbock, TX (United States); Auburn Univ., AL (United States); Univ. of Alabama, Tuscaloosa, AL (United States)
  3. Texas Tech Univ., Lubbock, TX (United States)
  4. Texas Tech Univ., Lubbock, TX (United States); Univ. of Texas, Austin, TX (United States)
+ Show Author Affiliations

Uranium is most stable when it is exposed to oxygen or water in its +6 oxidation state as the uranyl (UO22+) ion. This ion is subsequently particularly stable and very resistant to functionalization due to the inverse trans effect. Uranyl oxo ligands are typically not considered good hydrogen bond acceptors due to their weak Lewis basicity; however, the ligands bound in the equatorial plane greatly affect the strength of the oxo ligands’ hydrogen bonding. Here, in this work, new naphthylsalophen and pyrasal complexes of uranium were synthesized and crystallized for characterization in the solid state. The bond lengths and angles of the uranyl ion and the ligand conformation are compared. In the solid state, one of the pyrasal complexes showed a hydrogen bond directly from a water molecule to the uranyl oxo ligand, which resulted in an asymmetric lengthening of the U–Oyl bonds from 1.789 to 1.862 Å and 1.784 to 1.844 Å.

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 (CSGB)
Grant/Contract Number:
SC0019177; 89233218CNA000001
OSTI ID:
2500876
Report Number(s):
LA-UR--24-26692
Journal Information:
Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 1 Vol. 64; ISSN 0020-1669
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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