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Title: A Combined Density Functional Theory and Spectrophotometry Study of the Bonding Interactions of [NpO2·M]4+ Cation–Cation Complexes

Abstract

The equilibrium constants for [NpO2M∙]4+ (M = Al3+, In3+, Sc3+, Fe3+) in μ = 10 M nitric acid and [NpO2∙Ga]4+ in μ = 10 M hydrochloric acid media have been determined. The trend in the interaction strength follows: Fe3+ > Sc3+ In3+ > Ga3+ Al3+. These equilibrium constants are compared to those of previously reported values for NpO2+ complexes with Cr3+ and Rh3+ within the literature. Thermodynamic parameters and bonding modes are discussed, with density functional theory and natural bond orbital analysis indicating that the NpO2+ dioxocation acts as a -donor with transition-metal cations and a sigma donor with group 13 cations. The small changes in electron-donating ability is modulated by the overlap with the coordinating metal ion's valence atomic orbitals.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [2];  [1];  [1]
+ Show Author Affiliations
  1. Washington State Univ., Pullman, WA (United States). Dept. of Chemistry
  2. Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Washington State Univ., Pullman, WA (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC)
OSTI Identifier:
1356947
Alternate Identifier(s):
OSTI ID: 1596319
Grant/Contract Number:  
AC05-00OR22725; SC0001815
Resource Type:
Accepted Manuscript
Journal Name:
Inorganic Chemistry
Additional Journal Information:
Journal Volume: 56; Journal Issue: 9; Journal ID: ISSN 0020-1669
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; cation-cation; neptunium; high ionic strength; spectrophotometry; density functional theory

Citation Formats

Freiderich, John W., Burn, Adam G., Martin, Leigh R., Nash, Kenneth L., and Clark, Aurora E. A Combined Density Functional Theory and Spectrophotometry Study of the Bonding Interactions of [NpO2·M]4+ Cation–Cation Complexes. United States: N. p., 2017. Web. doi:10.1021/acs.inorgchem.6b02369.
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Freiderich, John W., Burn, Adam G., Martin, Leigh R., Nash, Kenneth L., & Clark, Aurora E. A Combined Density Functional Theory and Spectrophotometry Study of the Bonding Interactions of [NpO2·M]4+ Cation–Cation Complexes. United States. https://doi.org/10.1021/acs.inorgchem.6b02369
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Freiderich, John W., Burn, Adam G., Martin, Leigh R., Nash, Kenneth L., and Clark, Aurora E. Fri . "A Combined Density Functional Theory and Spectrophotometry Study of the Bonding Interactions of [NpO2·M]4+ Cation–Cation Complexes". United States. https://doi.org/10.1021/acs.inorgchem.6b02369. https://www.osti.gov/servlets/purl/1356947.
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@article{osti_1356947,
title = {A Combined Density Functional Theory and Spectrophotometry Study of the Bonding Interactions of [NpO2·M]4+ Cation–Cation Complexes},
author = {Freiderich, John W. and Burn, Adam G. and Martin, Leigh R. and Nash, Kenneth L. and Clark, Aurora E.},
abstractNote = {The equilibrium constants for [NpO2M∙]4+ (M = Al3+, In3+, Sc3+, Fe3+) in μ = 10 M nitric acid and [NpO2∙Ga]4+ in μ = 10 M hydrochloric acid media have been determined. The trend in the interaction strength follows: Fe3+ > Sc3+ In3+ > Ga3+ Al3+. These equilibrium constants are compared to those of previously reported values for NpO2+ complexes with Cr3+ and Rh3+ within the literature. Thermodynamic parameters and bonding modes are discussed, with density functional theory and natural bond orbital analysis indicating that the NpO2+ dioxocation acts as a -donor with transition-metal cations and a sigma donor with group 13 cations. The small changes in electron-donating ability is modulated by the overlap with the coordinating metal ion's valence atomic orbitals.},
doi = {10.1021/acs.inorgchem.6b02369},
journal = {Inorganic Chemistry},
number = 9,
volume = 56,
place = {United States},
year = {Fri Apr 14 00:00:00 EDT 2017},
month = {Fri Apr 14 00:00:00 EDT 2017}
}
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https://doi.org/10.1021/acs.inorgchem.6b02369
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    Impacts of hydrogen bonding interactions with Np( v / vi )O 2 Cl 4 complexes: vibrational spectroscopy, redox behavior, and computational analysis
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