TY - JOUR
T1 - Hydrogen bonding of H2O2 molecules in crystal structures of alkali metal and tetraethylammonium nitrate peroxosolvates
AU - Medvedev, Alexander G.
AU - Mel'nik, Elena A.
AU - Mikhaylov, Alexey A.
AU - Mayorov, Nikita S.
AU - Tripol'skaya, Tatiana A.
AU - Lev, Ovadia
AU - Prikhodchenko, Petr V.
AU - Churakov, Andrei V.
N1 - Publisher Copyright:
© 2025 The Royal Society of Chemistry.
PY - 2025
Y1 - 2025
N2 - Peroxosolvates of nitrates remain a poorly studied class of compounds among the crystalline adducts of hydrogen peroxide and salts of inorganic acids. Herein, we report the synthesis, crystal structures, and FTIR and thermal studies of four hydrogen peroxide adducts of alkali metal and tetraethylammonium nitrates: KNO3·0.5H2O2, RbNO3·0.5H2O2, RbNO3·0.5H2O2·0.5H2O, and Et4N+NO3−·2H2O2. The peroxosolvates of potassium and rubidium nitrates are found to be non-isomorphous. Solid state DFT calculations were performed to compare the hydrogen bond energy values of the hydrogen peroxide molecule with nitrate anions in the obtained compounds and bromide, chloride, sulfate and carbonate anions in the previously reported crystalline peroxosolvates of the corresponding salts. The calculated hydrogen bond energy values of hydrogen peroxide molecules with the anions correlate with their basicity. For the nitrate anion, these values (29.7-34.7 kJ mol−1) are higher than those for halides and lower than for sulfate and carbonate anions. In addition, the interaction of alkali metal cations with the oxygen atom of hydrogen peroxide was analyzed, revealing a non-covalent binding.
AB - Peroxosolvates of nitrates remain a poorly studied class of compounds among the crystalline adducts of hydrogen peroxide and salts of inorganic acids. Herein, we report the synthesis, crystal structures, and FTIR and thermal studies of four hydrogen peroxide adducts of alkali metal and tetraethylammonium nitrates: KNO3·0.5H2O2, RbNO3·0.5H2O2, RbNO3·0.5H2O2·0.5H2O, and Et4N+NO3−·2H2O2. The peroxosolvates of potassium and rubidium nitrates are found to be non-isomorphous. Solid state DFT calculations were performed to compare the hydrogen bond energy values of the hydrogen peroxide molecule with nitrate anions in the obtained compounds and bromide, chloride, sulfate and carbonate anions in the previously reported crystalline peroxosolvates of the corresponding salts. The calculated hydrogen bond energy values of hydrogen peroxide molecules with the anions correlate with their basicity. For the nitrate anion, these values (29.7-34.7 kJ mol−1) are higher than those for halides and lower than for sulfate and carbonate anions. In addition, the interaction of alkali metal cations with the oxygen atom of hydrogen peroxide was analyzed, revealing a non-covalent binding.
UR - http://www.scopus.com/inward/record.url?scp=86000134717&partnerID=8YFLogxK
U2 - 10.1039/d4ce01109k
DO - 10.1039/d4ce01109k
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AN - SCOPUS:86000134717
SN - 1466-8033
JO - CrystEngComm
JF - CrystEngComm
ER -