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Frohlich MT, Anderson KJ, Ugrinov A, Boudjouk P. Breaking Carbon-Chlorine Bonds with the Unconventional Lewis Acid Dodecachlorocyclohexasilane. Inorg Chem 2018; 57:14463-14466. [PMID: 30407799 DOI: 10.1021/acs.inorgchem.8b00631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
c-Si6Cl12 functions as a Lewis acid strong enough to abstract chloride ions from 2 mol of triphenylchloromethane to form the salt [Tr+]2[Si6Cl142-]. This is the first example of a Lewis acid "hole" breaking a carbon-halogen bond.
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Affiliation(s)
- Matthew T Frohlich
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58108 , United States
| | - Kenneth J Anderson
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58108 , United States
| | - Angel Ugrinov
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58108 , United States
| | - Philip Boudjouk
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58108 , United States
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Abstract
Photoinduced reactions of a pair of cyclohexasilane (CHS) monomers are explored by time-dependent excited-state molecular dynamics (TDESMD) calculations. In TDESMD trajectories, one observes vivid reaction events including dimerization and fragmentation. A general reaction pathway is identified as (i) ring-opening formation of a dimer, (ii) rearrangement induced by bond breaking, and (iii) decomposition through the elimination of small fragments. The identified pathway supports the chemistry proposed for the fabrication of silicon-based materials using CHS as a precursor. In addition, we find dimers have smaller HOMO-LUMO gaps and exhibit a red shift and line-width broadening in the computed photoluminescence spectra compared with a pair of CHS monomers.
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Affiliation(s)
- Yulun Han
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58102 , United States
| | - Kenneth Anderson
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58102 , United States
| | - Erik K Hobbie
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58102 , United States
| | - Philip Boudjouk
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58102 , United States
| | - Dmitri S Kilin
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58102 , United States
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Pokhodnya K, Anderson K, Kilina S, Dandu N, Boudjouk P. Mechanism of Charged, Neutral, Mono-, and Polyatomic Donor Ligand Coordination to Perchlorinated Cyclohexasilane (Si 6Cl 12). J Phys Chem A 2018; 122:4067-4075. [PMID: 29589757 DOI: 10.1021/acs.jpca.7b11052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the detailed computational study of several perchlorinated cyclohexasilane (Si6Cl12)-based inverse sandwich compounds. It was found that regardless of the donor ligand size and charge, for example, Cl- and CN- anions or neutral HCN and NCPh nitriles, their coordination to the puckered Si6Cl12 ring results in its flattening. The NBO and CDA studies of the complexes showed that coordination occurs due to hybridization of low-lying antibonding σ*(Si-Cl) and σ*(Si-Si) unoccupied molecular orbitals (UMOs) of Si6Cl12 and occupied molecular orbitals (OMOs) of donor molecules (predominantly lone-pair-related), resulting in donor-to-ring charge transfer accompanied by complex stabilization and ring flattening. It is known that the Si6 ring distortion results from vibronic coupling of OMO and UMO pairs (pseudo-Jahn-Teller effect, PJT). Consequently, the Si6 ring flattening most probably occurs due to suppression of the PJT effect in all of the studied compounds. In this paper, the stabilization energy E(2) associated with donor-acceptor charge transfer (delocalization) was estimated using NBO analysis for [Si6Cl12·2Cl]2-, [Si6Cl12·2(NC)]2-, Si6Cl12·2(NCH), and Si6Cl12·2(NCPh). It was found that the polarizability of the donor might significantly affect the stabilization energy value (Cl- > CN- > HCN). For the neutral complexes, the E(2) value is correlated with the charge on the nitrogen atoms. All of these factors, that is, specific donor E(2) value, charge transfer, complex MO energy diagrams, and so on, should be taken into account when choosing the ligands suitable for forming Si-based 1D compounds and other nanoscale materials.
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Affiliation(s)
- Konstantin Pokhodnya
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58108 , United States
| | - Kenneth Anderson
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58108 , United States
| | - Svetlana Kilina
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58108 , United States
| | - Naveen Dandu
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58108 , United States
| | - Philip Boudjouk
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58108 , United States
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Chen M, Jabeen F, Rasulev B, Ossowski M, Boudjouk P. A computational structure–property relationship study of glass transition temperatures for a diverse set of polymers. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/polb.24602] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Min Chen
- Center for Computationally Assisted Science and TechnologyNorth Dakota State UniversityFargo North Dakota58102
- Department of Computer ScienceNorth Dakota State UniversityFargo North Dakota58102
| | - Farukh Jabeen
- Center for Computationally Assisted Science and TechnologyNorth Dakota State UniversityFargo North Dakota58102
| | - Bakhtiyor Rasulev
- Center for Computationally Assisted Science and TechnologyNorth Dakota State UniversityFargo North Dakota58102
- Department of Coatings and Polymeric MaterialsNorth Dakota State UniversityFargo North Dakota58102
| | - Martin Ossowski
- Center for Computationally Assisted Science and TechnologyNorth Dakota State UniversityFargo North Dakota58102
| | - Philip Boudjouk
- Department of Chemistry and BiochemistryNorth Dakota State UniversityFargo North Dakota58102
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Pokhodnya K, Anderson K, Kilina S, Boudjouk P. Toward the Mechanism of Perchlorinated Cyclopentasilane (Si 5Cl 10) Ring Flattening in the [Si 5Cl 10·2Cl] 2- Dianion. J Phys Chem A 2017; 121:3494-3500. [PMID: 28406632 DOI: 10.1021/acs.jpca.6b12938] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report the detailed computational study of flattening of the puckered Si5 ring by suppression of the pseudo-Jahn-Teller (PJT) effect through coordination of two Cl- anions to the molecule forming an inverse sandwich dianion [Si5Cl10·2Cl]2- complex. The PJT effect that causes nonplanarity of the Si5Cl10 structure (Cs) results from vibronic coupling of pairs of occupied molecular orbitals (OMOs) and unoccupied molecular orbitals (UMOs). It was shown that filling the intervenient molecular orbitals of puckered Si5Cl10 with valent electron pairs of Cl- donors suppresses the PJT effect, with the Si5 ring becoming planar (D5h) upon complex formation. In this paper, the stabilization energy E(2) associated with donor-acceptor charge transfer (delocalization) was estimated using NBO analysis for all studied inverse sandwich compounds [Si5Cl10·2X]2- (where X = F, Cl, Br). It was found that the polarizability of the donor ion might significantly affect the stabilization energy value and should be taken into account when choosing the ligands suitable for forming Si-based one-dimensional compounds and other nanoscale materials.
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Affiliation(s)
- Konstantin Pokhodnya
- Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108, United States
| | - Kenneth Anderson
- Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108, United States
| | - Svetlana Kilina
- Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108, United States
| | - Philip Boudjouk
- Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108, United States
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Rasulev B, Jabeen F, Stafslien S, Chisholm BJ, Bahr J, Ossowski M, Boudjouk P. Polymer Coating Materials and Their Fouling Release Activity: A Cheminformatics Approach to Predict Properties. ACS Appl Mater Interfaces 2017; 9:1781-1792. [PMID: 27982587 DOI: 10.1021/acsami.6b12766] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A novel cheminformatics-based approach has been employed to investigate a set of polymer coating materials designed to mitigate the accumulation of marine biofouling on surfaces immersed in the sea. Specifically, a set of 27 nontoxic, amphiphilic polysiloxane-based polymer coatings was synthesized using a combinatorial, high-throughput approach and characterized for fouling-release (FR) activity toward a number of relevant marine fouling organisms, including bacteria, microalgae, and adult barnacles. In order to model these complex systems adequately, a new computational technique was used in which all investigated polymer-based coating materials were considered as mixture systems comprising several compositional variables at a range of concentrations. By applying a combination of methodologies for mixture systems and a quantitative structure-activity relationship approach (QSAR), seven unique QSAR models were developed that were able to successfully predict the desired FR properties. Furthermore, the developed models identified several significant descriptors responsible for FR activity of investigated polymer-based coating materials, with correlation coefficients ranging from rtest2 = 0.63 to 0.94. The computational models derived from this study may serve as a powerful set of tools to predict optimal combinations of source components to produce amphiphilic polysiloxane-based coating systems with effective, broad-spectrum FR properties.
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Affiliation(s)
- Bakhtiyor Rasulev
- Center for Computationally Assisted Science and Technology, North Dakota State University , Fargo, North Dakota, United States
- Department of Coatings and Polymeric Materials, North Dakota State University , Fargo, North Dakota, United States
| | - Farukh Jabeen
- Center for Computationally Assisted Science and Technology, North Dakota State University , Fargo, North Dakota, United States
| | - Shane Stafslien
- Research and Creative Activities, North Dakota State University , Fargo, North Dakota, United States
| | - Bret J Chisholm
- Department of Coatings and Polymeric Materials, North Dakota State University , Fargo, North Dakota, United States
| | - James Bahr
- Research and Creative Activities, North Dakota State University , Fargo, North Dakota, United States
| | - Martin Ossowski
- Center for Computationally Assisted Science and Technology, North Dakota State University , Fargo, North Dakota, United States
| | - Philip Boudjouk
- Center for Computationally Assisted Science and Technology, North Dakota State University , Fargo, North Dakota, United States
- Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota, United States
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Remington, Jr. MP, Boudjouk P. The synthesis of bismuth sulfide, antimony sulfide, and their solid solutions from tribenzylbismuth, tribenzylantimony, and elemental sulfur. PHOSPHORUS SULFUR 2016. [DOI: 10.1080/10426507.2015.1085043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | - Philip Boudjouk
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota, USA
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Iyer GRS, Hobbie EK, Guruvenket S, Hoey JM, Anderson KJ, Lovaasen J, Gette C, Schulz DL, Swenson OF, Elangovan A, Boudjouk P. Solution-based synthesis of crystalline silicon from liquid silane through laser and chemical annealing. ACS Appl Mater Interfaces 2012; 4:2680-2685. [PMID: 22545711 DOI: 10.1021/am300334p] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We report a solution process for the synthesis of crystalline silicon from the liquid silane precursor cyclohexasilane (Si(6)H(12)). Polysilane films were crystallized through thermal and laser annealing, with plasma hydrogenation at atmospheric pressure generating further structural changes in the films. The evolution from amorphous to microcrystalline is characterized using scanning electron microscopy (SEM), atomic force microscopy (AFM), Raman spectroscopy and impedance spectroscopy. A four-decade enhancement in the electrical conductivity is attributed to a disorder-order transition in a bonded Si network. Our results demonstrate a potentially attractive approach that employs a solution process coupled with ambient postprocessing to produce crystalline silicon thin films.
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Affiliation(s)
- Ganjigunte R S Iyer
- Department of Physics and Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota 58102, USA
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Dai X, Choi SB, Braun CW, Vaidya P, Kilina S, Ugrinov A, Schulz DL, Boudjouk P. Halide Coordination of Perhalocyclohexasilane Si6X12 (X = Cl or Br). Inorg Chem 2011; 50:4047-53. [DOI: 10.1021/ic102535n] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xuliang Dai
- Center for Nanoscale Science and Engineering, North Dakota State University, 1805 NDSU Research Park Drive, Fargo, North Dakota 58102, United States
| | - Seok-Bong Choi
- Center for Nanoscale Science and Engineering, North Dakota State University, 1805 NDSU Research Park Drive, Fargo, North Dakota 58102, United States
| | - Christopher W. Braun
- Center for Nanoscale Science and Engineering, North Dakota State University, 1805 NDSU Research Park Drive, Fargo, North Dakota 58102, United States
| | - Pooja Vaidya
- Center for Nanoscale Science and Engineering, North Dakota State University, 1805 NDSU Research Park Drive, Fargo, North Dakota 58102, United States
| | - Svetlana Kilina
- Department of Chemistry and Molecular Biology, North Dakota State University, P.O. Box 6050, Fargo, North Dakota 58108, United States
| | - Angel Ugrinov
- Department of Chemistry and Molecular Biology, North Dakota State University, P.O. Box 6050, Fargo, North Dakota 58108, United States
| | - Douglas L. Schulz
- Center for Nanoscale Science and Engineering, North Dakota State University, 1805 NDSU Research Park Drive, Fargo, North Dakota 58102, United States
| | - Philip Boudjouk
- Center for Nanoscale Science and Engineering, North Dakota State University, 1805 NDSU Research Park Drive, Fargo, North Dakota 58102, United States
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Pokhodnya K, Olson C, Dai X, Schulz DL, Boudjouk P, Sergeeva AP, Boldyrev AI. Flattening a puckered cyclohexasilane ring by suppression of the pseudo-Jahn–Teller effect. J Chem Phys 2011; 134:014105. [DOI: 10.1063/1.3516179] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Affiliation(s)
- Xuliang Dai
- Center for Nanoscale Science and Engineering
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Remington MP, Boudjouk P. An Improved Synthesis and Isolation of Tribenzylbismuth. PHOSPHORUS SULFUR 2008. [DOI: 10.1080/10426500802077127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Michael P. Remington
- a Department of Chemistry, Biochemistry and Molecular Biology , North Dakota State University–Fargo , Fargo , North Dakota , USA
| | - Philip Boudjouk
- a Department of Chemistry, Biochemistry and Molecular Biology , North Dakota State University–Fargo , Fargo , North Dakota , USA
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Majumdar P, Lee E, Patel N, Ward K, Stafslien SJ, Daniels J, Chisholm BJ, Boudjouk P, Callow ME, Callow JA, Thompson SEM. Combinatorial materials research applied to the development of new surface coatings IX: an investigation of novel antifouling/fouling-release coatings containing quaternary ammonium salt groups. Biofouling 2008; 24:185-200. [PMID: 18368587 DOI: 10.1080/08927010801894660] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Polysiloxane coatings containing chemically-bound ("tethered") quaternary ammonium salt (QAS) moieties were investigated for potential application as environmental-friendly coatings to control marine biofouling. A combinatorial/high-throughput approach was applied to the investigation to enable multiple variables to be probed simultaneously and efficiently. The variables investigated for the moisture-curable coatings included QAS composition, ie alkyl chain length, and concentration as well as silanol-terminated polysiloxane molecular weight. A total of 75 compositionally unique coatings were prepared and characterized using surface characterization techniques and biological assays. Biological assays were based on two different marine microorganisms, a bacterium, Cellulophaga lytica and a diatom, Navicula incerta, as well as a macrofouling alga, Ulva. The results of the study showed that all three variables influenced coating surface properties as well as antifouling (AF) and fouling-release (FR) characteristics. The incorporation of QAS moieties into a polysiloxane matrix generally resulted in an increase in coating surface hydrophobicity. Characterization of coating surface morphology revealed a heterogeneous, two-phase morphology for many of the coatings investigated. A correlation was found between water contact angle and coating surface roughness, with the contact angle increasing with increasing surface roughness. Coatings based on the QAS moiety containing the longest alkyl chain (18 carbons) displayed the highest micro-roughness and, thus, the most hydrophobic surfaces. With regard to AF and FR properties, coatings based on the 18 carbon QAS moieties were very effective at inhibiting C. lytica biofilm formation and enabling easy removal of Ulva sporelings (young plants) while coatings based on the 14 carbon QAS moities were very effective at inhibiting biofilm growth of N. incerta.
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Affiliation(s)
- Partha Majumdar
- Center for Nanoscale Science and Engineering, North Dakota State University, Fargo, ND 58105, USA
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Choi SB, Jepperson J, Jarabek L, Thomas J, Chisholm B, Boudjouk P. Novel Approach to Anti-Fouling and Fouling-Release Marine Coatings Based on Dual-Functional Siloxanes. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/masy.200750452] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Boudjouk P, So JH. Organic Sonochemistry. Ultrasonic Acceleration of the Reaction of Dicarbonyls with Trimethylchlorosilane in the Presence of Zinc. SYNTHETIC COMMUN 2006. [DOI: 10.1080/00397918608059657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Stafslien SJ, Bahr JA, Feser JM, Weisz JC, Chisholm BJ, Ready TE, Boudjouk P. Combinatorial Materials Research Applied to the Development of New Surface Coatings I: A Multiwell Plate Screening Method for the High-Throughput Assessment of Bacterial Biofilm Retention on Surfaces. ACTA ACUST UNITED AC 2005; 8:156-62. [PMID: 16529509 DOI: 10.1021/cc050047m] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Combinatorial, high-throughput capabilities have been established to aid in the rapid development of new and effective antifouling marine coatings for naval applications. A biological screening process involving marine bacteria was developed that allows for rapid and effective quantification of bacterial biofilm growth and retention on large numbers of coating surfaces in parallel. The screening process involves (1) multiwell plate modifications for coating deposition, (2) deposition of combinatorial coating libraries via an automated liquid dispensing robot, (3) coating thickness measurements of cured coatings, (4) preconditioning of coatings via immersion in deionized water, (5) bacterial incubation, (6) plate processing, and (7) data analysis for identification of promising candidates. The details of the method developed are described in this document.
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Affiliation(s)
- Shane J Stafslien
- Center for Nanoscale Science and Engineering, North Dakota Sate University, 1805 NDSU Research Park Drive, Fargo, North Dakota 58102, USA.
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Abstract
The preparation of biocide-incorporated silicone coatings for antifouling/fouling release applications is described. The biocide Triclosan (5-chloro-2-(2, 4-dichlorophenoxy) phenol) was modified with alkenyl moieties and incorporated into a silicone backbone through covalent bonds. The presence of the biocide on the coating surface was expected to deter fouling organisms from attaching to the surface of the coating. Allyl glycidyl ether was used to provide crosslink functionalities. Resins were cured using vinyl-terminated polydimethylsiloxane for hydrosilyl functionality and 1, 3-cyclohexane-bis (methylamine) for epoxy crosslinking functionality. Coatings were characterized by static water contact angle measurements and dynamic mechanical thermal analysis. Synthetic control over the incorporation of crosslink functionalities within the polymer resin allowed tuning of the surface of the coating and of mechanical properties. Resistance to macrofouling was tested by static immersion tests in the Indian River Lagoon at the Florida Institute of Technology from 15 October 2003 to 13 November 2003. Preliminary results showed that the coatings prepared from biocide-incorporated silicones with the appropriate bulk modulus significantly reduced macrofouling.
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Affiliation(s)
- Johnson Thomas
- Center for Nanoscale Science and Engineering, 1805 Research Park Drive, North Dakota State University, Fargo, ND 58102, USA
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Bahr SR, Boudjouk P. A convenient synthesis of 1,1,1,3,3,3-hexaphenyldiplumbathiane and 1,1,1,3,3,3-hexaphenyldiplumbaselenane. Inorg Chem 2002. [DOI: 10.1021/ic00045a030] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Boudjouk P, Black E, Kumarathasan R, Samaraweera U, Castellino S, Oliver JP, Kampf JW. Syntheses, Structures, and Reactions of Sulfur and Selenium Insertion Products of 1,1-Di-tert-butylsiliranes. Organometallics 2002. [DOI: 10.1021/om00021a052] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Sooriyakumaran R, Boudjouk P. Synthesis of the elusive 1,8-bis(trimethylsilyl)naphthalene and its facile rearrangement to the 1,7 isomer. Organometallics 2002. [DOI: 10.1021/om00061a039] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hong JH, Boudjouk P. Synthesis and Characterization of a Novel Pentavalent Silane: 1-Methyl-1,1-dihydrido-2,3,4,5-tetraphenyl-1-silacyclopentadiene Silicate, [Ph4C4SiMeH2-].cntdot.[K+]. Organometallics 2002. [DOI: 10.1021/om00001a082] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hong JH, Boudjouk P. A stable aromatic species containing silicon. Synthesis and characterization of the 1-tert-butyl-2,3,4,5-tetraphenyl-1-silacyclopentadienide anion. J Am Chem Soc 2002. [DOI: 10.1021/ja00066a090] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hong JH, Boudjouk P, Castellino S. Synthesis and Characterization of Two Aromatic Silicon-Containing Dianions:The 2,3,4,5-Tetraphenylsilole Dianion and the 1,1'-Disila-2,2',3,3',4,4',5,5'-Octaphenylfulvalene Dianion. Organometallics 2002. [DOI: 10.1021/om00021a005] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Boudjouk P, Woell JB, Radonovich LJ, Eyring MW. Organotransition-metal complexes of very basic ketones. The synthesis of dicarbonylcyclopentadienyliron complexes of diphenylcyclopropenone, tropone and phenalenone. The crystal and molecular structure of dicarbonylcyclopentadienyliron tropone tetrafluoroborate. Organometallics 2002. [DOI: 10.1021/om00064a003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wright A, Ling D, Boudjouk P, West R. New anionic rearrangements. XVI. 1,2-Anionic rearrangement from sulfur to carbon in benzylthiotrimethylsilane. J Am Chem Soc 2002. [DOI: 10.1021/ja00768a087] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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So JH, Park MK, Boudjouk P. Reductive coupling of carbonyl compounds with zinc and trimethylchlorosilane to produce O-silylated pinacols. Effect of ultrasonic waves. J Org Chem 2002. [DOI: 10.1021/jo00260a015] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Hilderbrandt RL, Homer GD, Boudjouk P. Molecular structure of 1-methyl-1-silabicyclo[2.2.1]heptane by gas-phase electron diffraction. Structural support for the trigonal bipyramidal transition state in SN2-silicon reactions. J Am Chem Soc 2002. [DOI: 10.1021/ja00440a003] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Thompson DP, Boudjouk P. A convenient synthesis of alkali metal selenides and diselenides in tetrahydrofuran and the reactivity differences exhibited by these salts toward organic bromides. Effect of ultrasound. J Org Chem 2002. [DOI: 10.1021/jo00244a051] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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So JH, Boudjouk P. A convenient synthesis of solvated and unsolvated anhydrous metal chlorides via dehydration of metal chloride hydrates with trimethylchlorosilane. Inorg Chem 2002. [DOI: 10.1021/ic00333a032] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Byung Hee Han, Boudjouk P. Organic sonochemistry. Ultrasound-promoted reaction of zinc with .alpha.,.alpha.'-dibromo-o-xylene. Evidence for facile generation of o-xylylene. J Org Chem 2002. [DOI: 10.1021/jo00343a035] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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