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Srikanth K, Kumar A, Tammineni RR. Unraveling the Photoelectron Spectrum of 1-Phospha-2,3,4-triazolate Anion, HCPN 3-, A Theoretical Approach. J Phys Chem A 2023; 127:78-91. [PMID: 36563286 DOI: 10.1021/acs.jpca.2c06701] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The first five low-lying electronic states of HCPN3 are probed through extensive ab initio electronic structure and quantum dynamics studies to reproduce the 193 nm photoelectron spectrum. Vibronic Hamiltonian is constructed and availed for time-dependent (TD) and time-independent (TI) quantum dynamical studies. The presence of numerous conical intersections (CIs) and crossings among electronic states yielded interesting nonadiabatic effects in the photoelectron bands of the overall spectrum. Moreover, the theoretical bands corresponding to five electronic states have reproduced all three experimental spectral bands. Among these, the first two bands originated due to a combination of four electronic states as predicted by previous studies. The third band corresponds to the fifth electronic state. The results calculated via TD and TI approaches exhibited satisfying agreement with the experimental results.
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Affiliation(s)
- Korutla Srikanth
- Department of Chemistry, Indian Institute of Technology Patna, Patna801106, India
| | - Abhishek Kumar
- Department of Chemistry, Indian Institute of Technology Patna, Patna801106, India
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2
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Petrov A, Conrad L, Coles NT, Weber M, Andrae D, Zagidullin A, Miluykov V, Müller C. Reactivity of Sodium Pentaphospholide Na[
cyclo
‐P
5
] towards C≡E (E=C, N, P) Triple Bonds. Chemistry 2022; 28:e202203056. [PMID: 36210344 PMCID: PMC10098531 DOI: 10.1002/chem.202203056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Indexed: 11/16/2022]
Abstract
A diglyme solution of Na[cyclo-P5 ] (1) reacts with alkynes and isolobal nitriles and phosphaalkynes to afford the otherwise elusive (aza)phospholide anions 2 a-c, 4 a,b, and 6. The reaction of Na[cyclo-P5 ] with alkynes and nitriles was studied by means of DFT methods, which suggested a concerted mechanism for the formation of 2 a and 4 b. The anions 2 a-c, 4 a,b, and 6 coordinate in an η5 -fashion towards FeII to give the sandwich (aza)phosphametallocenes 3 a-c, 5 a,b and 7 in moderate to good yields. The new compounds were characterized by means of multinuclear NMR spectroscopy, single-crystal X-ray diffraction and cyclic voltammetry.
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Affiliation(s)
- Andrey Petrov
- Institute of Chemistry and Biochemistry Freie Universität Berlin Fabeckstr. 34/36 14195 Berlin Germany
| | - Lawrence Conrad
- Institute of Chemistry and Biochemistry Freie Universität Berlin Arnimallee 22 14195 Berlin Germany
| | - Nathan T. Coles
- Institute of Chemistry and Biochemistry Freie Universität Berlin Fabeckstr. 34/36 14195 Berlin Germany
- School of Chemistry University of Nottingham University Park Nottingham NG7 2RD United Kingdom
| | - Manuela Weber
- Institute of Chemistry and Biochemistry Freie Universität Berlin Fabeckstr. 34/36 14195 Berlin Germany
| | - Dirk Andrae
- Institute of Chemistry and Biochemistry Freie Universität Berlin Arnimallee 22 14195 Berlin Germany
| | - Almaz Zagidullin
- Arbuzov Institute of Organic and Physical Chemistry FRC Kazan Scientific Center of RAS Arbuzov Str. 8 Kazan Russia
| | - Vasili Miluykov
- Arbuzov Institute of Organic and Physical Chemistry FRC Kazan Scientific Center of RAS Arbuzov Str. 8 Kazan Russia
| | - Christian Müller
- Institute of Chemistry and Biochemistry Freie Universität Berlin Fabeckstr. 34/36 14195 Berlin Germany
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3
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Gu X, Yang L, Jin P. Planar Inorganic Five-Membered Heterocycles with σ+π Dual Aromaticity in Both S0 and T1 States. Phys Chem Chem Phys 2022; 24:22091-22101. [DOI: 10.1039/d2cp03116g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclic species being aromatic in both the lowest singlet and triplet electronic states (so-called adaptive aromaticity) are scarce. To date, the reported systems are mostly organometallic heterocycles with the aromaticities...
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Hou GL, Chen B, Transue WJ, Hrovat DA, Cummins CC, Borden WT, Wang XB. A Joint Experimental and Computational Study of the Negative Ion Photoelectron Spectroscopy of the 1-Phospha-2,3,4-triazolate Anion, HCPN3(.). J Phys Chem A 2016; 120:6228-35. [PMID: 27434547 DOI: 10.1021/acs.jpca.6b06343] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report here the results of a combined experimental and computational study of the negative ion photoelectron spectroscopy (NIPES) of the recently synthesized, planar, aromatic, HCPN3(-) ion. The adiabatic electron detachment energy of HCPN3(-) (electron affinity of HCPN3(•)) was measured to be 3.555 ± 0.010 eV, a value that is intermediate between the electron detachment energies of the closely related (CH)2N3(-) and P2N3(-) ions. High level electronic structure calculations and Franck-Condon factor (FCF) simulations reveal that transitions from the ground state of the anion to two nearly degenerate, low-lying, electronic states, of the neutral HCPN3(•) radical are responsible for the congested peaks at low binding energies in the NIPE spectrum. The best fit of the simulated NIPE spectrum to the experimental spectrum indicates that the ground state of HCPN3(•) is a 5π-electron (2)A″ π radical state, with a 6π-electron, (2)A', σ radical state being at most 1.0 kcal/mol higher in energy.
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Affiliation(s)
- Gao-Lei Hou
- Physical Sciences Division, Pacific Northwest National Laboratory , P.O. Box 999, MS K8-88, Richland, Washington 99352, United States
| | - Bo Chen
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University , Ithaca, New York 14853, United States
| | - Wesley J Transue
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - David A Hrovat
- Department of Chemistry and the Center for Advanced Scientific Computing and Modeling, University of North Texas , 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
| | - Christopher C Cummins
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Weston Thatcher Borden
- Department of Chemistry and the Center for Advanced Scientific Computing and Modeling, University of North Texas , 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
| | - Xue-Bin Wang
- Physical Sciences Division, Pacific Northwest National Laboratory , P.O. Box 999, MS K8-88, Richland, Washington 99352, United States
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5
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Nizovtsev AS. Search for aromatic anions in the P2E3− (E = N, P, As, Sb, Bi) series. Phys Chem Chem Phys 2016; 18:16084-7. [DOI: 10.1039/c6cp02241c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nine aromatic five-membered rings were computationally characterized in the P2E3− (E = N, P, As, Sb, Bi) series of anions.
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Affiliation(s)
- Anton S. Nizovtsev
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of the Russian Academy of Sciences
- Novosibirsk
- Russian Federation
- Novosibirsk State University
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