Isomers and electronic states of Ni2O2H2 and evaluation of the effect of charge on the electronic properties and reactivity of Ni2O2
Different isomers of Ni2O2H2 are investigated by multireference configuration interaction (MRCI) calculations, based on complete active space self-consistent field (CASSCF) calculations. The lowest-lying Ni2(OH)2 isomer has a rhombic shape with two OH- groups bridging two NiI ions. Its ground term i...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
November 13, 2013
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| In: |
The journal of physical chemistry. A, Molecules, clusters, and aerosols
Year: 2013, Volume: 117, Issue: 47, Pages: 12635-12641 |
| ISSN: | 1520-5215 |
| DOI: | 10.1021/jp409138a |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/jp409138a
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| Author Notes: | Olaf Hübner and Hans-Jörg Himmel |
| Summary: | Different isomers of Ni2O2H2 are investigated by multireference configuration interaction (MRCI) calculations, based on complete active space self-consistent field (CASSCF) calculations. The lowest-lying Ni2(OH)2 isomer has a rhombic shape with two OH- groups bridging two NiI ions. Its ground term is a 1Ag term. At a relative energy of 1.06 eV, there is a chain-like NiONi(OH2) isomer. A rhombic (NiH)2O2 isomer with Ni-H bonds has a considerably higher energy of 2.93 eV. Both Ni2(OH)2 and NiONi(OH2) feature a large number of low-lying electronic terms that in the case of Ni2(OH)2 form Heisenberg spin ladders due to the coupling of the electrons of two NiI ions (3d84s1) with S = 3/2. For the reaction Ni2O2 + H2 → Ni2(OH)2, the reaction energy is estimated to −2 eV. Finally, neutral and charged Ni2O2 and their hydrogenation products (Ni2O2H20/+) are compared. |
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| Item Description: | Gesehen am 16.11.2021 |
| Physical Description: | Online Resource |
| ISSN: | 1520-5215 |
| DOI: | 10.1021/jp409138a |