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Yang Z, Sun BJ, He C, Goettl S, Lin YT, Chang AHH, Kaiser RI. Combined Experimental and Computational Study on the Reaction Dynamics of the D1-Silylidyne(SiD) – Silane (SiH4) System. J Phys Chem A 2021; 125:2472-2479. [DOI: 10.1021/acs.jpca.0c11538] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhenghai Yang
- Department of Chemistry, University of Hawai’i at Manoa, Honolulu, Hawaii 96822, United States
| | - Bing-Jian Sun
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
| | - Chao He
- Department of Chemistry, University of Hawai’i at Manoa, Honolulu, Hawaii 96822, United States
| | - Shane Goettl
- Department of Chemistry, University of Hawai’i at Manoa, Honolulu, Hawaii 96822, United States
| | - Yu-Ting Lin
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
| | - Agnes H. H. Chang
- Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
| | - Ralf I. Kaiser
- Department of Chemistry, University of Hawai’i at Manoa, Honolulu, Hawaii 96822, United States
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2
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Moulder CA, Kafle K, Zhou CX, Cundari TR. Thermochemistry of Tungsten-3p Elements for Density Functional Theory, Caveat Lector! J Phys Chem A 2021; 125:681-690. [PMID: 33405918 DOI: 10.1021/acs.jpca.0c05351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
There are two primary foci in this research on WE (E = Si, P, and S) bonds: prediction of their bond dissociation enthalpies (BDEs), including σ- and π-bond energy components, and assessing the uncertainty of these BDE predictions for levels of theory commonly used in the literature. The internal standards for computational accuracy include metal-element bond lengths (mean absolute error = 1.8 ± 1.2%), main group homolog BDEs versus higher levels of ab initio theory (W1U and G4 BDEs, R2 = 0.98), and DLPNO-CCSD(T)/def2-QZVPP calculations for metal-ligand BDEs (R2 = 0.88). The W═Si first π-bond is underreported for density functional theory (DFT)/MP2 methods versus DLPNO-CCSD(T), while the latter shows negligible strength for the W;Si second π-bond, consistent with the literature. This research highlights clear issues with the underlying assumptions required for the use of perturbation theory methods for the fragments derived from W-P homolysis. The difficulties associated with modeling the metal thermochemistry with DFT (and MP2) levels of theory are manifest in the broad standard deviations observed. However, the average BDEs found using 48 popular DFT and MP2 levels of theory are reliable, 10.8 ± 6.8% mean absolute error (with W-P removed) versus DLPNO-CCSD(T), with the caveat that the individual basis set/pseudopotential/valence basis set combination can vary wildly. Analysis of the absolute error percentages with respect to the level of theory indicates little benefit to going higher on Jacob's Ladder, as simpler methods have lower error versus high-level ab initio techniques such as G4 and DLPNO-CCSD(T).
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Affiliation(s)
- Catherine A Moulder
- Department of Chemistry, Center for Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
| | - Kristina Kafle
- Department of Chemistry, Center for Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
| | - Christopher X Zhou
- Department of Chemistry, Center for Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
| | - Thomas R Cundari
- Department of Chemistry, Center for Advanced Scientific Computing and Modeling (CASCaM), University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5017, United States
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Lin SY, Chou SL, Lin MY, Huang WJ, Huang TP, Wu YJ. Formation and IR spectrum of monobridged Si 2H 4 isolated in solid argon. J Chem Phys 2020; 152:204308. [PMID: 32486679 DOI: 10.1063/5.0010293] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The infrared (IR) spectrum of monobridged Si2H4 (denoted as mbr-Si2H4) isolated in solid Ar was recorded, and a set of lines (in the major matrix site) observed at 858.3 cm-1, 971.5 cm-1, 999.2 cm-1, 1572.7 cm-1, 2017.7 cm-1, 2150.4 cm-1, and 2158.4 cm-1 were characterized. The species was produced by the electron bombardment of an Ar matrix sample containing a small proportion of SiH4 during matrix deposition. Upon photolysis of the matrix samples using 365 nm and 160 nm light, the content of mbr-Si2H4 increased. The band positions, relative intensity ratios, and D-isotopic shift ratios of the observed IR features are generally in good agreement with those predicted by the B3LYP/aug-cc-pVTZ method. In addition, the photochemistry of the observed products was discussed.
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Affiliation(s)
- Shu-Yu Lin
- National Synchrotron Radiation Research Center, Hsinchu Science Park, 101 Hsin-Ann Road, Hsinchu 30076, Taiwan
| | - Sheng-Lung Chou
- National Synchrotron Radiation Research Center, Hsinchu Science Park, 101 Hsin-Ann Road, Hsinchu 30076, Taiwan
| | - Meng-Yeh Lin
- National Synchrotron Radiation Research Center, Hsinchu Science Park, 101 Hsin-Ann Road, Hsinchu 30076, Taiwan
| | - Wen-Jian Huang
- National Synchrotron Radiation Research Center, Hsinchu Science Park, 101 Hsin-Ann Road, Hsinchu 30076, Taiwan
| | - Tzu-Ping Huang
- National Synchrotron Radiation Research Center, Hsinchu Science Park, 101 Hsin-Ann Road, Hsinchu 30076, Taiwan
| | - Yu-Jong Wu
- National Synchrotron Radiation Research Center, Hsinchu Science Park, 101 Hsin-Ann Road, Hsinchu 30076, Taiwan
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Bhattacharyya P, Rai DK, Shukla A. Systematic First-Principles Configuration-Interaction Calculations of Linear Optical Absorption Spectra in Silicon Hydrides: Si 2H 2n ( n = 1-3). J Phys Chem A 2019; 123:8619-8631. [PMID: 31508955 DOI: 10.1021/acs.jpca.9b06054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have performed first-principles electron-correlated calculations employing large basis sets to optimize the geometries and to compute linear optical absorption spectra of various low-lying conformers of silicon hydrides: Si2H2n, n = 1, 2, 3. The geometry optimization for various isomers was carried out at the coupled-cluster singles-doubles-perturbative-triples [CCSD(T)] level of theory, while their excited states and absorption spectra were computed using a large-scale multireference singles-doubles configuration-interaction approach, which includes electron-correlation effects at a sophisticated level. Our calculated spectra are the first ones for Si2H2 and Si2H4 conformers, while for Si2H6, we obtain excellent agreement with the experimental measurements, suggesting that our computational approach is reliable. Our calculated absorption spectra exhibit a strong structure-property relationship, suggesting the possibility of identifying various conformers based on their optical absorption fingerprints. Furthermore, we have also performed geometry optimization for the selected optically excited states, providing insights into their character.
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Affiliation(s)
- Pritam Bhattacharyya
- Department of Physics , Indian Institute of Technology Bombay , Powai , Mumbai 400076 , India
| | - Deepak Kumar Rai
- Department of Physics , Indian Institute of Technology Bombay , Powai , Mumbai 400076 , India
| | - Alok Shukla
- Department of Physics , Indian Institute of Technology Bombay , Powai , Mumbai 400076 , India
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5
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Ideal gas thermochemical properties of silicon containing inorganic, organic compounds, radicals, and ions. INT J CHEM KINET 2018. [DOI: 10.1002/kin.21188] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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6
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Nguyen TN, Lin MC. Ab Initio Chemical Kinetics for SiH xReactions with Si 2H y( x= 1,2,3,4; y= 6,5,4,3; x+ y= 7) under a-Si:H CVD Condition. INT J CHEM KINET 2017. [DOI: 10.1002/kin.21067] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Trong-Nghia Nguyen
- Center for Interdisciplinary Molecular Science; Department of Applied Chemistry; National Chiao Tung University; Hsinchu 300 Taiwan
- Department of Physical Chemistry; Hanoi University of Science and Technology; Hanoi Vietnam
| | - M. C. Lin
- Center for Interdisciplinary Molecular Science; Department of Applied Chemistry; National Chiao Tung University; Hsinchu 300 Taiwan
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Dolgonos GA, Mekalka K. Strain in nonclassical silicon hydrides: An insight into the “ultrastability” of sila-bi[6]prismane (Si18H12) cluster with the endohedrally trapped silicon atom, Si19H12. J Comput Chem 2015. [DOI: 10.1002/jcc.24014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Grygoriy A. Dolgonos
- Computational Centre of Chizevsky's Regional Scientific Library; 24 V Perspektyvna street Kirovograd 25006 Ukraine
| | - Koshka Mekalka
- Computational Centre of Chizevsky's Regional Scientific Library; 24 V Perspektyvna street Kirovograd 25006 Ukraine
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Seal P, Truhlar DG. Large entropic effects on the thermochemistry of silicon nanodusty plasma constituents. J Am Chem Soc 2014; 136:2786-99. [PMID: 24432718 DOI: 10.1021/ja410498d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Determination of the thermodynamic properties of reactor constituents is the first step in designing control strategies for plasma-mediated deposition processes and is also a key fundamental issue in physical chemistry. In this work, a recently proposed multistructural statistical thermodynamic method is used to show the importance of multiple structures and torsional anharmonicity in determining the thermodynamic properties of silicon hydride clusters, which are important both in plasmas and in thermally driven systems. It includes five different categories of silicon hydride clusters and radicals, including silanes, silyl radicals, and silenes. We employed a statistical mechanical approach, namely the recently developed multistructural (MS) anharmonicity method, in combination with density functional theory to calculate the partition functions, which in turn are used to estimate thermodynamic quantities, namely Gibbs free energy, enthalpy, entropy, and heat capacity, for all of the systems considered. The calculations are performed using all of the conformational structures of each molecule or radical by employing the multistructural quasiharmonic approximation (MS-QH) and also by including torsional potential anharmonicity (MS-T). For those cases where group additivity (GA) results are available, the thermodynamic quantities obtained from our MS-T calculations differ considerably due to the fact that the GA method is based on single-structure data for isomers of each stoichiometry, and hence lack multistructural effects; whereas we find that multistructural effects are very important in silicon hydride systems. Our results also indicate that the entropic effect on the thermochemistry is huge and is dominated by multistructural effects. The entropic effect of multiple structures is also expected to be important for other kinds of chain molecules, and its effect on nucleation kinetics is expected to be large.
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Affiliation(s)
- Prasenjit Seal
- Department of Chemistry, Supercomputing Institute, and Chemical Theory Center, University of Minnesota , Minneapolis, Minnesota 55455-0431, United States
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9
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Raghunath P, Lin MC. Ab initio chemical kinetics for SiH2 + Si2H6 and SiH3 + Si2H5 reactions and the related unimolecular decomposition of Si3H8 under a-Si/H CVD conditions. J Phys Chem A 2013; 117:10811-23. [PMID: 24059703 DOI: 10.1021/jp407553a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The kinetics and mechanisms for SiH2 + Si2H6 and SiH3 + Si2H5 reactions and the related unimolecular decomposition of Si3H8 have been investigated by ab initio molecular orbital theory based on the QCISD(T)/CBS//QCISD/6-311++G(d,p) method in conjunction with quantum statistical variational Rice-Ramsperger-Kassel-Marcus (RRKM) calculations. For the barrierless radical association processes, their variational transition states have been characterized by the CASPT2//CASSCF method. The species involved in the study are known to coexist under CVD conditions. The results show that the association reaction of SiH2 and Si2H6 producing Si3H8 occurs by insertion via its lowest-energy path forming a loose hydrogen-bonding molecular complex with 8.3 kcal/mol binding energy; the reaction is exothermic by 55.0 kcal/mol. The chemically activated Si3H8 adduct can fragment by several paths, producing SiH4 + SiH3SiH (-0.7 kcal/mol), Si(SiH3)2 + H2 (-1.4 kcal/mol), and SiH3SiH2SiH + H2 (-1.4 kcal/mol). The predicted enthalpy changes as given agree well with available thermochemical data. Three other decomposition channels of Si3H8 occurring by Si-H or Si-Si breaking were found to be highly endothermic, and the reactions take place without a well-defined barrier. The heats of formation of Si3H8, SiH2SiH, Si2H4, i-Si3H7, n-Si3H7, Si(SiH3)2, and SiH3SiH2SiH have been predicted and found to be in close agreement with those available data in the literature. The product branching rate constants for SiH2 + Si2H6 and SiH3 + Si2H5 reactions and the thermal unimolecular decomposition of Si3H8 for all low-energy paths have been calculated with multichannel variational RRKM theory covering varying P,T conditions typically employed in PECVD and Cat-CVD processes for hydrogenated amorphous silicon (a-Si/H) film growth. The results were also found to be in good agreement with available kinetic data. Our kinetic results may be employed to model and control very large-area a-Si/H film growth for a new generation of solar cell applications.
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Affiliation(s)
- P Raghunath
- Center for Interdisciplinary Molecular Science, Department of Applied Chemistry, National Chiao Tung University , Hsinchu 300, Taiwan
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10
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George MAR, Savoca M, Dopfer O. Infrared Spectrum of the Si3H8+Cation: Evidence for a Bridged Isomer with an Asymmetric Three-Center Two-Electron SiHSi Bond. Chemistry 2013; 19:15315-28. [DOI: 10.1002/chem.201302189] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2013] [Indexed: 11/09/2022]
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11
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Law MM, Fraser-Smith JT, Perotto CU. The potential energy surface of isomerising disilyne. Phys Chem Chem Phys 2012; 14:6922-36. [DOI: 10.1039/c2cp40605e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Oyedepo GA, Peterson C, Wilson AK. Accurate predictions of the energetics of silicon compounds using the multireference correlation consistent composite approach. J Chem Phys 2011; 135:094103. [DOI: 10.1063/1.3626838] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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13
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Jasinski JM. Gas Phase and Gas Surface Kinetics of Transient Silicoin Hydride Species. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-334-11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractThis paper presents a summary of the current state of our understanding of the absolute reactivity of transient silicon hydride species, such as SiH, SiH2and SiH3in the gas phase and at the surface of thin films.
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Wu SY, Raghunath P, Wu JS, Lin MC. Ab Initio Chemical Kinetic Study for Reactions of H Atoms with SiH4 and Si2H6: Comparison of Theory and Experiment. J Phys Chem A 2009; 114:633-9. [DOI: 10.1021/jp908222g] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- S. Y. Wu
- Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
| | - P. Raghunath
- Center for Interdisciplinary Molecular Science, Institute of Molecular Science, National Chiao Tung University, Hsinchu 300, Taiwan
| | - J. S. Wu
- Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
| | - M. C. Lin
- Center for Interdisciplinary Molecular Science, Institute of Molecular Science, National Chiao Tung University, Hsinchu 300, Taiwan
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16
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Damrauer R, Noble AL. Ions Related to Silynes and Disilynes: Computational Studies. Organometallics 2008. [DOI: 10.1021/om701220s] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robert Damrauer
- Chemistry Department, Downtown Campus, University of Colorado, Denver Campus, Box 194, P.O. Box 173364, Denver, Colorado 80217-3364
| | - Anna Louise Noble
- Chemistry Department, Downtown Campus, University of Colorado, Denver Campus, Box 194, P.O. Box 173364, Denver, Colorado 80217-3364
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17
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Dolgonos G. Thermodynamic properties of possible isomers of disilyne: A high-level ab initio study. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.02.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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18
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Carrier W, Zheng W, Osamura Y, Kaiser RI. Infrared spectroscopic identification of digermene, Ge2H4(X1Ag), and of the digermenyl radical, Ge2H3(X2A″), together with their deuterated counterparts in low temperature germane matrices. Chem Phys 2006. [DOI: 10.1016/j.chemphys.2006.08.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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First infrared spectroscopic characterization of digermyl (Ge2H5) and d5-digermyl (Ge2D5) radicals in low temperature germane matrices. Chem Phys 2006. [DOI: 10.1016/j.chemphys.2005.11.046] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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20
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Becerra R, Gaspar PP, Harrington CR, Leigh WJ, Vargas-Baca I, Walsh R, Zhou D. Direct detection of dimethylstannylene and tetramethyldistannene in solution and the gas phase by laser flash photolysis of 1,1-dimethylstannacyclopent-3-enes. J Am Chem Soc 2006; 127:17469-78. [PMID: 16332099 DOI: 10.1021/ja052675d] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The photochemistry of 1,1-dimethyl- and 1,1,3,4-tetramethylstannacyclopent-3-ene (4a and 4b, respectively) has been studied in the gas phase and in hexane solution by steady-state and 193-nm laser flash photolysis methods. Photolysis of the two compounds results in the formation of 1,3-butadiene (from 4a) and 2,3-dimethyl-1,3-butadiene (from 4b) as the major products, suggesting that cycloreversion to yield dimethylstannylene (SnMe2) is the main photodecomposition pathway of these molecules. Indeed, the stannylene has been trapped as the Sn-H insertion product upon photolysis of 4a in hexane containing trimethylstannane. Flash photolysis of 4a in the gas phase affords a transient absorbing in the 450-520-nm range that is assigned to SnMe2 by comparison of its spectrum and reactivity to those previously reported from other precursors. Flash photolysis of 4b in hexane solution affords results consistent with the initial formation of SnMe2 (lambda(max) approximately 500 nm), which decays over approximately 10 micros to form tetramethyldistannene (5b; lambda(max) approximately 470 nm). The distannene decays over the next ca. 50 micros to form at least two other longer-lived species, which are assigned to higher SnMe2 oligomers. Time-dependent DFT calculations support the spectral assignments for SnMe2 and Sn2Me4, and calculations examining the variation in bond dissociation energy with substituent (H, Me, and Ph) in disilenes, digermenes, and distannenes rule out the possibility that dimerization of SnMe2 proceeds reversibly. Addition of methanol leads to reversible reaction with SnMe2 to form a transient absorbing at lambda(max) approximately 360 nm, which is assigned to the Lewis acid-base complex between SnMe2 and the alcohol.
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Affiliation(s)
- Rosa Becerra
- Instituto de Quimica-Fisica Rocasolano, C.S.I.C., C/Serrano 119, 28006 Madrid, Spain
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Sillars D, Bennett CJ, Osamura Y, Kaiser RI. First infrared spectroscopic characterization of the disilyl (Si2H5) and d5-disilyl (Si2D5) radicals in low temperature silane matrices. Chem Phys 2004. [DOI: 10.1016/j.chemphys.2004.05.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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22
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Infrared spectroscopic detection of the disilenyl (Si2H3) and d3-disilenyl (Si2D3) radicals in silane and d4-silane matrices. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.06.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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23
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Bharatam PV, Moudgil R, Kaur D. Electron deficient bridges involving silylenes: a theoretical study. Inorg Chem 2003; 42:4743-9. [PMID: 12870967 DOI: 10.1021/ic026033s] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ab initio and density functional studies show that silylenes can form complexes with BH(3) and the resultant complexes possess 3c-2e bridges. The complexation energy for the formation of the these H-bridged structures is in the range of 18-46 kcal/mol. The characteristics of the electron deficient bridges depend on the substituents attached to the silylenes. With an increase in the pi-donating capacity of the substituents, the exothermicity of complex formation gets reduced but the kinetic stability of the H-bridged structures increase. The natural bond orbital analysis shows that all the H-bridged structures are associated with sigma(B-H)-->ppi(Si) second-order delocalization, which is responsible for the origin of the 3c-2e bonds. The complexation energies of the silylene-BH(3) complexes have been shown to have a correlation to the singlet-triplet energy gaps of silylenes.
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Affiliation(s)
- Prasad V Bharatam
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143 0 05, India.
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Affiliation(s)
- Michel Sablier
- Département de Chimie, Laboratoire des Mécanismes Réactionnels, UMR 7651 du CNRS, Ecole Polytechnique, 91128 Palaiseau Cedex, France
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Andrews L, Wang X. Infrared Spectra of the Novel Si2H2 and Si2H4 Species and the SiH1,2,3 Intermediates in Solid Neon, Argon, and Deuterium. J Phys Chem A 2002. [DOI: 10.1021/jp0204814] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Lester Andrews
- Department of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4319
| | - Xuefeng Wang
- Department of Chemistry, University of Virginia, P.O. Box 400319, Charlottesville, Virginia 22904-4319
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26
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Tonokura K, Murasaki T, Koshi M. Formation Mechanism of Hydrogenated Silicon Clusters during Thermal Decomposition of Disilane. J Phys Chem B 2001. [DOI: 10.1021/jp015523n] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kenichi Tonokura
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Tetsuya Murasaki
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Mitsuo Koshi
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Chambreau SD, Zhang J. VUV photoionization time-of-flight mass spectrometry of flash pyrolysis of silane and disilane. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)00739-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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29
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Cioslowski J, Schimeczek M, Liu G, Stoyanov V. A set of standard enthalpies of formation for benchmarking, calibration, and parametrization of electronic structure methods. J Chem Phys 2000. [DOI: 10.1063/1.1321306] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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30
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Diagnostics of the gas-phase thermal decomposition of Si2H6 using vacuum ultraviolet photoionization. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)00165-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Tada N, Tonokura K, Matsumoto K, Koshi M, Miyoshi A, Matsui H. Photolysis of Disilane at 193 nm. J Phys Chem A 1999. [DOI: 10.1021/jp982348a] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Naoya Tada
- Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kenichi Tonokura
- Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Keiji Matsumoto
- Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Mitsuo Koshi
- Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Akira Miyoshi
- Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Hiroyuki Matsui
- Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Katzer G, Ernst MC, Sax AF, Kalcher J. Computational Thermochemistry of Medium-Sized Silicon Hydrides. J Phys Chem A 1997. [DOI: 10.1021/jp9631947] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gernot Katzer
- Institut für Theoretische Chemie, Karl-Franzens Universität Graz, A-8010 Graz, Austria
| | - Margot C. Ernst
- Institut für Theoretische Chemie, Karl-Franzens Universität Graz, A-8010 Graz, Austria
| | - Alexander F. Sax
- Institut für Theoretische Chemie, Karl-Franzens Universität Graz, A-8010 Graz, Austria
| | - Josef Kalcher
- Institut für Theoretische Chemie, Karl-Franzens Universität Graz, A-8010 Graz, Austria
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Radeke MR, Carter EA. A dynamically and kinetically consistent mechanism for H2 adsorption/desorption from Si(100)-2 x 1. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:11803-11817. [PMID: 9984972 DOI: 10.1103/physrevb.54.11803] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Nachtigall P, Jordan KD, Smith A, Jónsson H. Investigation of the reliability of density functional methods: Reaction and activation energies for Si–Si bond cleavage and H2 elimination from silanes. J Chem Phys 1996. [DOI: 10.1063/1.470885] [Citation(s) in RCA: 106] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Selected ion flow drift tube studies of the kinetics of the reactions of Si+(2P) with C2H2 and C6H6. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0168-1176(95)04281-o] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Glosík J, Zakouřil P, Lindinger W. Selected ion flow drift tube studies of the reactions of Si+(2P) with HCl, H2O, H2S, and NH3: Reactions which produce atomic hydrogen. J Chem Phys 1995. [DOI: 10.1063/1.470375] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ruscic B, Berkowitz J. The heats of formation of some C2H5O+ isomers, relevant bond energies in ethanol and PA(CH3CHO). J Chem Phys 1994. [DOI: 10.1063/1.467843] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Thiel W, Voityuk AA. Extension of MNDO to d orbitals: parameters and results for silicon. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0166-1280(94)85037-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Nandi PK, Misra A, Sannigrahi AB. Ab-initio SCF study of the nature of bonding in neutral and cationic silicon hydrides and analogous carbon compounds. J CHEM SCI 1994. [DOI: 10.1007/bf02840753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Park YK, Myles CW. Semiempirical total-energy functional for silicon-hydrogen interactions in solids. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:17086-17091. [PMID: 10008312 DOI: 10.1103/physrevb.48.17086] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Goumri A, Yuan WJ, Ding L, Marshall P. An investigation of the gas-phase reaction of atomic bromine with disilane: implications for the Si2H5H bond strength. Chem Phys Lett 1993. [DOI: 10.1016/0009-2614(93)90012-p] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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D’Evelyn MP, Cohen SM, Rouchouze E, Yang YL. Surface π bonding and the near‐first‐order desorption kinetics of hydrogen from Ge(100)2×1. J Chem Phys 1993. [DOI: 10.1063/1.464078] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yoo RK, Ruscic B, Berkowitz J. Photoionization of As2and As4: Implications for group V clusters. J Chem Phys 1992. [DOI: 10.1063/1.462579] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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D’Evelyn MP, Yang YL, Sutcu LF. π‐bonded dimers, preferential pairing, and first‐order desorption kinetics of hydrogen on Si(100)–(2×1). J Chem Phys 1992. [DOI: 10.1063/1.462417] [Citation(s) in RCA: 130] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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