1
|
Bondarenko OB, Komarov AI, Nikolaeva SN, Holt T, Kutateladze AG, Gloriozov IP. Rearrangements of the Radical Cations of 3-Aryl-5-fluoroisoxazoles: Further Evidence for Existence of Benzocyclopropenyl Cation. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2023; 34:2547-2555. [PMID: 37812762 DOI: 10.1021/jasms.3c00267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
The fragmentation reaction of the radical cations of 3-aryl-5-fluoroisoxazoles formed via EI-MS is described. A new rearrangement accompanied by fluorine atom migration is discovered. A mechanistic rationale for the rearrangement supporting the existence of a fluorinated benzocyclopropenyl cation was proposed based on the experimental data and quantum chemical calculations.
Collapse
Affiliation(s)
- Oksana B Bondarenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Arseniy I Komarov
- Department of Chemistry, M. V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Svetlana N Nikolaeva
- Department of Chemistry, M. V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Tina Holt
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208, United States
| | - Andrei G Kutateladze
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208, United States
| | - Igor P Gloriozov
- Department of Chemistry, M. V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| |
Collapse
|
2
|
Zaitsev KV, Veshchitsky GA, Oprunenko YF, Kharcheva AV, Moiseeva AA, Gloriozov IP, Lermontova EK. 1,2-Bis(triazolyl)tetraphenyldigermanes: Synthesis, Structure and Properties. Chem Asian J 2023:e202300753. [PMID: 37886881 DOI: 10.1002/asia.202300753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/26/2023] [Accepted: 10/27/2023] [Indexed: 10/28/2023]
Abstract
Using the [3+2] cycloaddition reaction of [HC≡C-GePh2 -]2 (1) and a number of RCH2 N3 , this work described the synthesis of a series of novel heterocyclic digermanes, bitriazoles [1,4-C2 HN3 (CH2 R)GePh2 -]2 , 2-12 (R=Ph, p-Tol, p-C6 H4 NMe2 , p-C6 H4 OMe, p-C6 H4 Br, m-C6 H4 NO2 , 2-Naphth, CH2 -p-OC6 H4 CHO, CH2 -p-OC6 H4 COOMe, CH2 P(O)(OEt)2 , COOEt), difficult to produce by other methods. The structural peculiarities of these compounds were studied in detail by NMR spectroscopy and by XRD analysis (for 6, 9 and 10). The properties of 1-12 were studied by UV/vis and luminescence emission spectroscopy, electrochemistry and DFT calculations, indicating an effective conjugation in their molecules.
Collapse
Affiliation(s)
- Kirill V Zaitsev
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1, 3, 119991, Moscow, Russia
| | - Gleb A Veshchitsky
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1, 3, 119991, Moscow, Russia
| | - Yuri F Oprunenko
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1, 3, 119991, Moscow, Russia
| | - Anastasia V Kharcheva
- Department of Physics, M.V. Lomonosov Moscow State University, Leninskie Gory 1, 2, 119991, Moscow, Russia
| | - Anna A Moiseeva
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1, 3, 119991, Moscow, Russia
| | - Igor P Gloriozov
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1, 3, 119991, Moscow, Russia
| | - Elmira Kh Lermontova
- N.S. Kurnakov General and Inorganic Chemistry Institute, Russian Academy of Sciences, Leninskii prospect, 31, 119991, Moscow, Russia
| |
Collapse
|
3
|
Shamsiev RS. The surface chemistry of norbornadiene and norbornene on Pd(111) and Pd(100): a comparative DFT study. J Mol Model 2023; 29:342. [PMID: 37843696 DOI: 10.1007/s00894-023-05738-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 09/27/2023] [Indexed: 10/17/2023]
Abstract
CONTEXT The interaction of norbornadiene (NBD) and norbornene (NBE) with the palladium (111) and (100) surfaces have been investigated using density functional theory (DFT). Five configurations of adsorbed NBD may be formed on Pd(111): endo-tetra-σ, endo-di-σ,π, endo-di-π, exo-di-σ, and exo-π. The NBE molecule adsorbed on Pd(111) may exist in 4 configurations: endo-di-σ, endo-π, exo-di-σ, and exo-π. On Pd(100), a smaller number adsorption configurations of NBD and NBE are formed, since the double bonds of these molecules in the endo-orientation are bound only in a di-σ mode. The adsorption energy of NBD and NBE molecules on Pd(100) is noticeably higher compared to Pd(111), which is due to the surface geometry of Pd(100). The most stable configurations on both Pd facets are endo-tetra-σ for NBD and exo-di-σ for NBE. However, due to smaller adsorption area of the exo-di-σ configuration on Pd(111), a larger number of NBD molecules may adsorbed on the same surface area. Energetically favorable endo-tetra-σ (NBD) and exo-di-σ (NBE) configurations are very mobile on Pd(111). On Pd(100), only NBE molecules can migrate, while NBD migration is hindered due to the high activation barrier. METHODS All DFT calculations were performed using the Perdew-Burke-Ernzerhof density functional (PBE) with the relativistic SBK effective core potential and TZ2P basis set in the PRIRODA program.
Collapse
Affiliation(s)
- Ravshan S Shamsiev
- MIREA - Russian Technological University, Lomonosov Institute of Fine Chemical Technologies, 86 Vernadsky Avenue, 119571, Moscow, Russian Federation.
| |
Collapse
|
4
|
Bis(oxiranes) Containing Cyclooctane Core: Synthesis and Reactivity towards NaN 3. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27206889. [PMID: 36296482 PMCID: PMC9607513 DOI: 10.3390/molecules27206889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/10/2022] [Accepted: 10/12/2022] [Indexed: 11/05/2022]
Abstract
Reactions of oxirane ring opening provide a powerful tool for regio- and stereoselective synthesis of polyfunctional and heterocyclic compounds, widely used in organic chemistry and drug design. Cyclooctane, alongside other medium-sized rings, is of interest as a novel molecular platform for the construction of target-oriented leads. Additionally, cyclooctane derivatives are well known to be prone to transannular reactions, which makes them a promising object in the search for novel approaches to polycyclic structures. In the present work, a series of cyclooctanediones was studied in Corey-Chaykovsky reactions, and novel spirocyclic bis(oxiranes) containing cyclooctane core, namely, 1,5-dioxadispiro[2.0.2.6]dodecane and 1,8-dioxadispiro[2.3.2.3]dodecane, were synthesized. Ring opening of the obtained bis(oxiranes) upon treatment with sodium azide was investigated, and it was found that the reaction path is determined by the reciprocal orientation of oxygen atoms in the oxirane moieties. Diastereomers of the bis(oxiranes) with cis-orientation underwent independent ring opening, supplying corresponding diazidodiols, while in the case of stereoisomers with trans-orientation, domino-like reactions occurred, including intramolecular nucleophilic attack and the formation of a novel three- or six-membered O-containing ring. Summarily, a straightforward approach to polyfunctional compounds containing cyclooctane or oxabicyclo[3.3.1]nonane cores, employing bis(oxiranes), was elaborated.
Collapse
|
5
|
First Trifluoromethylated Phenanthrolinediamides: Synthesis, Structure, Stereodynamics and Complexation with Ln(III). Molecules 2022; 27:molecules27103114. [PMID: 35630590 PMCID: PMC9143926 DOI: 10.3390/molecules27103114] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 05/05/2022] [Accepted: 05/10/2022] [Indexed: 11/17/2022] Open
Abstract
The first examples of 1,10-phenanthroline-2,9-diamides bearing CF3-groups on the side amide substituents were synthesized. Due to stereoisomerism and amide rotation, such complexes have complicated behavior in solutions. Using advanced NMR techniques and X-ray analysis, their structures were completely elucidated. The possibility of the formation of complex compounds with lanthanoids nitrates was shown, and the constants of their stability are quantified. The results obtained are explained in terms of quantum-chemical calculations.
Collapse
|
6
|
|
7
|
Lemport PS, Evsiunina MV, Matveev PI, Petrov VS, Pozdeev AS, Khult EK, Nelyubina YV, Isakovskaya KL, Roznyatovsky VA, Gloriozov IP, Tarasevich BN, Aldoshin AS, Petrov VG, Kalmykov SN, Ustynyuk YA, Nenajdenko VG. 2-Methylpyrrolidine derived 1,10-phenanthroline-2,9-diamides: promising extractants for Am( iii)/Ln( iii) separation. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00803c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work we report on new examples of phenanthrolindiamides containing asymmetric centers in amide substituents.
Collapse
Affiliation(s)
- P. S. Lemport
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - M. V. Evsiunina
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - P. I. Matveev
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - V. S. Petrov
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - A. S. Pozdeev
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - E. K. Khult
- Department of Materials Science, Lomonosov Moscow State University, Leninskie gory 1 bld. 73, Moscow 119991, Russia
| | - Yu. V. Nelyubina
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Russia
| | - K. L. Isakovskaya
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Russia
- D.I. Mendeleev University of Chemical Technology of Russia, Russia
| | - V. A. Roznyatovsky
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - I. P. Gloriozov
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - B. N. Tarasevich
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - A. S. Aldoshin
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - V. G. Petrov
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - S. N. Kalmykov
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - Yu. A. Ustynyuk
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - V. G. Nenajdenko
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| |
Collapse
|
8
|
Volosatova AD, Lukianova MA, Zasimov PV, Feldman VI. Direct evidence for a radiation-induced synthesis of acetonitrile and isoacetonitrile from a 1 : 1 CH 4HCN complex at cryogenic temperatures: is it a missing link between inorganic and prebiotic astrochemistry? Phys Chem Chem Phys 2021; 23:18449-18460. [PMID: 34612385 DOI: 10.1039/d1cp01598b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nitriles are important constituents of extraterrestrial media. Nitriles are supposed to play a crucial role in prebiotic chemistry occurring in the interstellar medium. In this work, we have investigated the low-temperature radiation-induced transformations of a 1 : 1 CH4HCN complex as a plausible precursor of the simplest nitriles using the matrix isolation approach with FTIR spectroscopic detection. The parent complexes isolated in a noble gas (Ng) matrix were obtained by deposition of the CH4/HCN/Ng gaseous mixture and characterized by comparison of experimental complexation-induced shifts of the HCN fundamentals with the results of the ab initio calculations. It was found that the X-ray irradiation of low-temperature matrices containing the isolated 1 : 1 CH4HCN complex resulted in the formation of acetonitrile (CH3CN) and isoacetonitrile (CH3NC) and it appears to be the first experimental evidence for the formation of C2 nitriles (acetonitrile and isoacetonitrile) from such a "building block". Additionally, a 1 : 1 CH4HNC complex was tentatively assigned to the irradiated Ar and Kr matrices. It is demonstrated that the matrix has a strong effect on the CH3CN/CH3NC yield ratio, which dramatically increases in the row Ar < Kr < Xe. Also, the efficiency of the radiation-induced formation of the CH4HNC complex was shown to decrease from Ar to Kr. It is believed that the proposed pathway for acetonitrile formation may be a significant step in the radiation-induced evolution leading to complex organic molecules and biomolecules under astrochemical conditions. Furthermore, the obtained results provide a prominent example of the impact of very weak intermolecular interactions on the radiation-induced transformations in cold media.
Collapse
|
9
|
Adeyiga O, Odoh SO. Methane Over-Oxidation by Extra-Framework Copper-Oxo Active Sites of Copper-Exchanged Zeolites: Crucial Role of Traps for the Separated Methyl Group. Chemphyschem 2021; 22:1101-1109. [PMID: 33786957 DOI: 10.1002/cphc.202100103] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/30/2021] [Indexed: 11/07/2022]
Abstract
Copper-exchanged zeolites are useful for stepwise conversion of methane to methanol at moderate temperatures. This process also generates some over-oxidation products like CO and CO2 . However, mechanistic pathways for methane over-oxidation by copper-oxo active sites in these zeolites have not been previously described. Adequate understanding of methane over-oxidation is useful for developing systems with higher methanol yields and selectivities. Here, we use density functional theory (DFT) to examine methane over-oxidation by [Cu3 O3 ]2+ active sites in zeolite mordenite MOR. The methyl group formed after activation of a methane C-H bond can be stabilized at a μ-oxo atom of the active site. This μ-(O-CH3 ) intermediate can undergo sequential hydrogen atom abstractions till eventual formation of a copper-monocarbonyl species. Adsorbed formaldehyde, water and formates are also formed during this process. The overall mechanistic path is exothermic, and all intermediate steps are facile at 200 °C. Release of CO from the copper-monocarbonyl costs only 3.4 kcal/mol. Thus, for high methanol selectivities, the methyl group from the first hydrogen atom abstraction step must be stabilized away from copper-oxo active sites. Indeed, it must be quickly trapped at an unreactive site (short diffusion lengths) while avoiding copper-oxo species (large paths between active sites). This stabilization of the methyl group away from the active sites is central to the high methanol selectivities obtained with stepwise methane-to-methanol conversion.
Collapse
Affiliation(s)
- Olajumoke Adeyiga
- Department of Chemistry, University of Nevada Reno, 1664 N. Virginia Street, Reno, NV 89557-0216, USA
| | - Samuel O Odoh
- Department of Chemistry, University of Nevada Reno, 1664 N. Virginia Street, Reno, NV 89557-0216, USA
| |
Collapse
|
10
|
Adeyiga O, Panthi D, Odoh SO. Heterometallic [Cu–O–M] 2+ active sites for methane C–H activation in zeolites: stability, reactivity, formation mechanism and relationship to other active sites. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00687h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Formation energies and mechanisms, autoreduction and methane C–H reactivities were obtained for [Cu–O–M]2+ species (M = Ti–Cu, Zr–Mo and Ru–Ag) in mordenite with DFT. These reveal that [Cu2O]2+ is best suited for MMC.
Collapse
Affiliation(s)
| | - Dipak Panthi
- Department of Chemistry
- University of Nevada Reno
- Reno
- USA
| | | |
Collapse
|