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Siberchicot B, Aupiais J. Bond-bending isomerism and metallophilicity in metal-halogen anions (Cu,Ag,Au) 2X 3 -, X = F, Cl, Br, I, At. RSC Adv 2023; 13:7129-7134. [PMID: 36875882 PMCID: PMC9979621 DOI: 10.1039/d2ra07457e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 02/16/2023] [Indexed: 03/06/2023] Open
Abstract
In the framework of DFT (ABINIT package), we have performed atomic relaxations on the (Cu,Ag,Au)2X3 -, X = F, Cl, Br, I, At anion series. Opposite to linear (MX2)- anions, all (M2X3)- systems are triangular (C 2v symmetry). According to the system, we classified these anions in three categories according to the relative strength of electronegativity, chemical hardness, metallophilicity and van der Waals interaction. We found two bond-bending isomers: (Au2I3)- and (Au2At3)-.
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Affiliation(s)
- Bruno Siberchicot
- CEA, DAM, DIF F-92297 Arpajon France .,CEA, Laboratoire Matière en Conditions Extrêmes, Université Paris-Saclay F-91680 Bruyères-le-Châtel France
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Li WL, Liu HT, Jian T, Lopez GV, Piazza ZA, Huang DL, Chen TT, Su J, Yang P, Chen X, Wang LS, Li J. Bond-bending isomerism of Au 2I 3-: competition between covalent bonding and aurophilicity. Chem Sci 2016; 7:475-481. [PMID: 29896343 PMCID: PMC5952886 DOI: 10.1039/c5sc03568f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 10/12/2015] [Indexed: 11/29/2022] Open
Abstract
We report a joint photoelectron spectroscopy and theoretical investigation of the gaseous Au2I3- cluster, which is found to exhibit two types of isomers due to competition between Au-I covalent bonding and Au-Au aurophilic interactions. The covalent bonding favors a bent IAuIAuI- structure with an obtuse Au-I-Au angle (100.7°), while aurophilic interactions pull the two Au atoms much closer, leading to an acutely bent structure (72.0°) with an Au-Au distance of 3.08 Å. The two isomers are separated by a small barrier and are nearly degenerate with the obtuse isomer being slightly more stable. At low temperature, only the obtuse isomer is observed; distinct experimental evidence is observed for the co-existence of a combination of isomers with both acute and obtuse bending angles at room temperature. The two bond-bending isomers of Au2I3- reveal a unique example of one molecule being able to oscillate between different structures as a result of two competing chemical forces.
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Affiliation(s)
- Wan-Lu Li
- Department of Chemistry & Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education , Tsinghua University , Beijing 100084 , China .
| | - Hong-Tao Liu
- Shanghai Institute of Applied Physics , Chinese Academy of Sciences , Shanghai 201800 , China
| | - Tian Jian
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , USA .
| | - Gary V Lopez
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , USA .
| | - Zachary A Piazza
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , USA .
| | - Dao-Ling Huang
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , USA .
| | - Teng-Teng Chen
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , USA .
| | - Jing Su
- Department of Chemistry & Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education , Tsinghua University , Beijing 100084 , China .
- Shanghai Institute of Applied Physics , Chinese Academy of Sciences , Shanghai 201800 , China
| | - Ping Yang
- Theoretical Division T-1 , Los Alamos National Laboratory , Los Alamos , NM 87544 , USA
| | - Xin Chen
- Department of Chemistry & Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education , Tsinghua University , Beijing 100084 , China .
| | - Lai-Sheng Wang
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , USA .
| | - Jun Li
- Department of Chemistry & Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education , Tsinghua University , Beijing 100084 , China .
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Di Nicola FP, Lanzi M, Marchetti F, Pampaloni G, Zacchini S. Is bond stretch isomerism in mononuclear transition metal complexes a real issue? The misleading case of the MoCl5/tetrahydropyran reaction system. Dalton Trans 2015; 44:12653-9. [PMID: 26080003 DOI: 10.1039/c5dt01378j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Distinct batches of orange (1a-e) and green crystals (2a-e) were isolated from the reactions of MoCl5 with tetrahydropyran (thp), respectively at room temperature (in CH2Cl2) and at ca. 80 °C (in ClCH2CH2Cl). Crystals 2a-e are isomorphous to 1a-e and the IR spectra are almost superimposable. 1a-e were identified by X-ray studies as cis-MoCl4(thp)2, in agreement with previous findings. Careful refinement of the X-ray data of 2a-e by modeling one position as disordered between chlorine (minor component) and oxygen (major component) led to the conclusion that 2a-e consisted of a mixture of cis-MoCl4(thp)2 and mer-MoOCl3(thp)2, the latter being largely prevalent.
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Affiliation(s)
- Francesco Paolo Di Nicola
- University of Bologna, Dipartimento di Chimica Industriale "Toso Montanari", Viale Risorgimento 4, I-40136 Bologna, Italy
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