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- W2024451700 endingPage "2290" @default.
- W2024451700 startingPage "2282" @default.
- W2024451700 abstract "Abstract On the basis of uranyl complexes reacting with a polypyrrolic ligand (H 4 L), we explored structures and reaction energies of a series of new binuclear uranium(VI) complexes using relativistic density functional theory. Full geometry optimizations on [(UO 2 ) 2 (L)], in which two uranyl groups were initially placed into the pacman ligand cavity, led to two minimum‐energy structures. These complexes with cation–cation interactions (CCI) exhibit unusual coordination modes of uranyls: one is a T‐shaped ( T ) skeleton formed by two linear uranyls {O exo U 2 O endo →U 1 (O exo ) 2 }, and another is a butterfly‐like ( B ) unit with one linear uranyl coordinating side‐by‐side to a second cis ‐uranyl. The CCI in T was confirmed by the calculated longest distance and lowest stretching vibrational frequency of U 2 O endo among the four UO bonds. Isomer B is more stable than T , for which experimental tetrameric analogues are known. The formation of B and T complexes from the mononuclear [(UO 2 )(H 2 L)(thf)] ( M ) was found to be endothermic. The further protonation and dehydration of B and T are thermodynamically favorable. As a possible product, we have found a trianglelike binuclear uranium(VI) complex having a OUOUO unit." @default.
- W2024451700 created "2016-06-24" @default.
- W2024451700 creator A5003496334 @default.
- W2024451700 creator A5072831412 @default.
- W2024451700 creator A5076218164 @default.
- W2024451700 date "2010-02-08" @default.
- W2024451700 modified "2023-10-18" @default.
- W2024451700 title "Binuclear Uranium(VI) Complexes with a “Pacman” Expanded Porphyrin: Computational Evidence for Highly Unusual Bis-Actinyl Structures" @default.
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