Journal articles: 'H bond activation'

1

Ilies, Laurean. "Iron-Catalyzed C-H Bond Activation." Journal of Synthetic Organic Chemistry, Japan 75, no. 8 (2017): 802–9. http://dx.doi.org/10.5059/yukigoseikyokaishi.75.802.

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2

Liu, Yunyun, and Baoli Zhao. "Step-Economical C–H Activation Reactions Directed by In Situ Amidation." Synthesis 52, no. 21 (May 18, 2020): 3211–18. http://dx.doi.org/10.1055/s-0040-1707124.

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Owing to the inherent ability of amides to chelate transition-metal catalysts, amide-directed C–H activation reactions constitute a major tactic in directed C–H activation reactions. While the conventional procedures for these reactions usually involve prior preparation and purification of amide substrates before the C–H activation, the step economy is actually undermined by the operation of installing the directing group (DG) and related substrate purification. In this context, directed C–H activation via in situ amidation of the crude material provides a new protocol that can significantly enhance the step economy of amide-directed C–H activation. In this short review, the advances in C–H bond activation reactions mediated or initiated by in situ amidation are summarized and analyzed.1 Introduction2 In Situ Amidation in Aryl C–H Bond Activation3 In Situ Amidation in Alkyl C–H Bond Activation4 Annulation Reactions via Amidation-Mediated C–H Activation5 Remote C–H Activation Mediated by Amidation6 Conclusion

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3

Shi, Renyi, Lijun Lu, Hangyu Xie, Jingwen Yan, Ting Xu, Hua Zhang, Xiaotian Qi, Yu Lan, and Aiwen Lei. "C8–H bond activation vs. C2–H bond activation: from naphthyl amines to lactams." Chemical Communications 52, no. 90 (2016): 13307–10. http://dx.doi.org/10.1039/c6cc06358f.

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Pd-catalyzed selective amine-oriented C8–H bond functionalization/N-dealkylative carbonylation of naphthyl amines has been achieved. The amine group from dealkylation is proposed to be the directing group for promoting this process. It represents a straightforward and easy method to access various biologically important benzo[cd]indol-2(1H)-one derivatives.

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4

Cui, Weihong, and Bradford B. Wayland. "Hydrocarbon C-H bond activation by rhodium porphyrins." Journal of Porphyrins and Phthalocyanines 08, no. 02 (February 2004): 103–10. http://dx.doi.org/10.1142/s108842460400009x.

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Rhodium porphyrins provide a variety of C-H bond reactions with both aromatic and aliphatic hydrocarbons that acquire unusual selectivity in part through the steric requirements of the porphyrin ligand. Rhodium(III) porphyrins selectively react with aromatic C-H bonds by electrophilic substitution with the virtual exclusion of aliphatic C-H bond activation. Rhodium(II) porphyrins react by a metal-centered radical pathway with alkyl aromatics and alkanes selectively at the alkyl C-H bond with total exclusion of aromatic C-H bond activation. Reactions of rhodium(II) metalloradicals with alkyl C-H bonds have large deuterium isotope effects, small activation enthalpies and large negative activation entropies consistent with a near linear symmetrical four-centered transition state ( Rh ˙⋯ H ⋯ C ⋯˙Rh). The nature of this transition state and the dimensions of rhodium porphyrins provide steric constraints that preclude aromatic C-H bond reactions and give high kinetic preference for methane activation as the smallest alkane substrate. Rhodium(II) tethered diporphyrin bimetalloradical complexes convert the C-H bond reactions to bimolecular processes with dramatically increased reaction rates and high selectivity for methane activation.

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5

ROUHI, MAUREEN. "Real-world C-H bond activation." Chemical & Engineering News 75, no. 41 (October 13, 1997): 4–5. http://dx.doi.org/10.1021/cen-v075n041.p004a.

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6

Shang, Rui, Laurean Ilies, and Eiichi Nakamura. "Iron-Catalyzed C–H Bond Activation." Chemical Reviews 117, no. 13 (April 5, 2017): 9086–139. http://dx.doi.org/10.1021/acs.chemrev.6b00772.

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7

Milstein, David. "Metal–ligand cooperation by aromatization–dearomatization as a tool in single bond activation." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 373, no. 2037 (March 13, 2015): 20140189. http://dx.doi.org/10.1098/rsta.2014.0189.

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Metal–ligand cooperation (MLC) plays an important role in bond activation processes, enabling many chemical and biological catalytic reactions. A recent new mode of activation of chemical bonds involves ligand aromatization–dearomatization processes in pyridine-based pincer complexes in which chemical bonds are broken reversibly across the metal centre and the pincer-ligand arm, leading to new bond-making and -breaking processes, and new catalysis. In this short review, such processes are briefly exemplified in the activation of C–H, H–H, O–H, N–H and B–H bonds, and mechanistic insight is provided. This new bond activation mode has led to the development of various catalytic reactions, mainly based on alcohols and amines, and to a stepwise approach to thermal H 2 and light-induced O 2 liberation from water.

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8

ROUHI, MAUREEN. "Steps in Si-H bond activation revealed." Chemical & Engineering News 76, no. 41 (October 12, 1998): 17. http://dx.doi.org/10.1021/cen-v076n041.p017.

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9

Labinger, Jay A., and John E. Bercaw. "Understanding and exploiting C–H bond activation." Nature 417, no. 6888 (May 2002): 507–14. http://dx.doi.org/10.1038/417507a.

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10

Chen, Ke, Albert Eschenmoser, and Phil S Baran. "Strain Release in CH Bond Activation?" Angewandte Chemie International Edition 48, no. 51 (November 24, 2009): 9705–8. http://dx.doi.org/10.1002/anie.200904474.

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11

Chen, Ke, Albert Eschenmoser, and Phil S Baran. "Strain Release in CH Bond Activation?" Angewandte Chemie 121, no. 51 (November 24, 2009): 9885–88. http://dx.doi.org/10.1002/ange.200904474.

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12

Bollinger, J. Martin, and Joan B. Broderick. "Frontiers in enzymatic C–H-bond activation." Current Opinion in Chemical Biology 13, no. 1 (February 2009): 51–57. http://dx.doi.org/10.1016/j.cbpa.2009.03.018.

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13

Nagorny, Pavel, and Zhankui Sun. "New approaches to organocatalysis based on C–H and C–X bonding for electrophilic substrate activation." Beilstein Journal of Organic Chemistry 12 (December 23, 2016): 2834–48. http://dx.doi.org/10.3762/bjoc.12.283.

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Hydrogen bond donor catalysis represents a rapidly growing subfield of organocatalysis. While traditional hydrogen bond donors containing N–H and O–H moieties have been effectively used for electrophile activation, activation based on other types of non-covalent interactions is less common. This mini review highlights recent progress in developing and exploring new organic catalysts for electrophile activation through the formation of C–H hydrogen bonds and C–X halogen bonds.

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14

Herron, Jeffrey A., Yoshitada Morikawa, and Manos Mavrikakis. "Ab initio molecular dynamics of solvation effects on reactivity at electrified interfaces." Proceedings of the National Academy of Sciences 113, no. 34 (August 8, 2016): E4937—E4945. http://dx.doi.org/10.1073/pnas.1604590113.

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Using ab initio molecular dynamics as implemented in periodic, self-consistent (generalized gradient approximation Perdew–Burke–Ernzerhof) density functional theory, we investigated the mechanism of methanol electrooxidation on Pt(111). We investigated the role of water solvation and electrode potential on the energetics of the first proton transfer step, methanol electrooxidation to methoxy (CH3O) or hydroxymethyl (CH2OH). The results show that solvation weakens the adsorption of methoxy to uncharged Pt(111), whereas the binding energies of methanol and hydroxymethyl are not significantly affected. The free energies of activation for breaking the C−H and O−H bonds in methanol were calculated through a Blue Moon Ensemble using constrained ab initio molecular dynamics. Calculated barriers for these elementary steps on unsolvated, uncharged Pt(111) are similar to results for climbing-image nudged elastic band calculations from the literature. Water solvation reduces the barriers for both C−H and O−H bond activation steps with respect to their vapor-phase values, although the effect is more pronounced for C−H bond activation, due to less disruption of the hydrogen bond network. The calculated activation energy barriers show that breaking the C−H bond of methanol is more facile than the O−H bond on solvated negatively biased or uncharged Pt(111). However, with positive bias, O−H bond activation is enhanced, becoming slightly more facile than C−H bond activation.

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15

Muñoz-Molina, José María, Tomás R. Belderrain, and Pedro J. Pérez. "Recent Advances in Copper-Catalyzed Radical C–H Bond Activation Using N–F Reagents." Synthesis 53, no. 01 (August 25, 2020): 51–64. http://dx.doi.org/10.1055/s-0040-1707234.

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This Short Review is aimed at giving an update in the area of copper-catalyzed C–H functionalization involving nitrogen-centered radicals generated from substrates containing N–F bonds. These processes include intermolecular Csp3–H bond functionalization, remote Csp3–H bond functionalization via intramolecular hydrogen atom transfer (HAT), and Csp2–H bond functionalization, which might be of potential use in industrial applications in the future.1 Introduction2 Intermolecular Csp3–H Functionalization3 Remote Csp3–H Functionalization4 Csp2–H Functionalization5 Conclusion

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16

Zhang, Dongju, Ruoxi Wang, and Rongxiu Zhu. "A New Pathway for Activation of C - C and C - H Bonds by Transition Metals in the Gas Phase." Australian Journal of Chemistry 58, no. 2 (2005): 82. http://dx.doi.org/10.1071/ch04154.

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C–H and C–C bond activation of hydrocarbons at metal centres are of fundamental importance in biochemistry, organometallic chemistry, and catalysis. The present work aims to search for novel mechanisms for activation of C–C and C–H bonds by transition metals in the gas phase. Using high-level density functional calculations, we systemically studied the reactions of Ti+, V+, and Fe+ with ethane, and proposed new pathways of C–C and C–H bond activation—concerted activation of C–C and C–H bonds, and 1,2-H2 elimination. These two pathways clearly differ from the general addition–elimination mechanism.

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17

Liu, Jialin, Xiaoyu Xiong, Jie Chen, Yuntao Wang, Ranran Zhu, and Jianhui Huang. "Double C–H Activation for the C–C bond Formation Reactions." Current Organic Synthesis 15, no. 7 (October 16, 2018): 882–903. http://dx.doi.org/10.2174/1570179415666180720111422.

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Background: Among the numerous bond-forming patterns, C–C bond formation is one of the most useful tools for building molecules for the chemical industry as well as life sciences. Recently, one of the most challenging topics is the study of the direct coupling reactions via multiple C–H bond cleavage/activation processes. A number of excellent reviews on modern C–H direct functionalization have been reported by Bergman, Bercaw, Yu and others in recent years. Among the large number of available methodologies, Pdcatalyzed reactions and hypervalent iodine reagent mediated reactions represent the most popular metal and non-metal involved transformations. However, the comprehensive summary of the comparison of metal and non-metal mediated transformations is still not available. Objective: The review focuses on comparing these two types of reactions (Pd-catalyzed reactions and hypervalent iodine reagent mediated reactions) based on the ways of forming new C–C bonds, as well as the scope and limitations on the demonstration of their synthetic applications. Conclusion: Comparing the Pd-catalyzed strategies and hypervalent iodine reagent mediated methodologies for the direct C–C bond formation from activation of C-H bonds, we clearly noticed that both strategies are powerful tools for directly obtaining the corresponding pruducts. On one hand, the hypervalent iodine reagents mediated reactions are normally under mild conditions and give the molecular diversity without the presence of transition-metal, while the Pd-catalyzed approaches have a broader scope for the wide synthetic applications. On the other hand, unlike Pd-catalyzed C-C bond formation reactions, the study towards hypervalent iodine reagent mediated methodology mainly focused on the stoichiometric amount of hypervalent iodine reagent, while few catalytic reactions have been reported. Meanwhile, hypervalent iodine strategy has been proved to be more efficient in intramolecular medium-ring construction, while there are less successful examples on C(sp3)–C(sp3) bond formation. In summary, we have demonstrated a number of selected approaches for the formation of a new C–C bond under the utilization of Pd-catalyzed reaction conditions or hyperiodine reagents. The direct activations of sp2 or sp3 hybridized C–H bonds are believed to be important strategies for the future molecular design as well as useful chemical entity synthesis.

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18

Ochi, Noriaki, Yoshihide Nakao, Hirofumi Sato, and Shigeyoshi Sakaki. "Theoretical prediction of O–H, Si–H, and Si–C σ-bond activation reactions by titanium(IV)–imido complex." Canadian Journal of Chemistry 87, no. 10 (October 2009): 1415–24. http://dx.doi.org/10.1139/v09-113.

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The O–H σ-bond activation of methanol, the Si–H σ-bond activation of silane, and the Si–C σ-bond activation of methylsilane by titanium(IV)–imido complex (Me3SiO)2Ti(NSiMe3) were theoretically investigated with DFT and MP2 to MP4(SDQ) methods. The O–H σ-bond activation of methanol occurs with small activation barrier (Ea) of 7.1 (14.6) kcal/mol and large exothermicity (Eexo) of 65.8 (61.4) kcal/mol to afford (Me3SiO)2Ti(OCH3)[NH(SiMe3)], indicating that the O–H σ-bond activation occurs easier than the C–H σ-bond activation (Ea = 14.6 (21.5) kcal/mol and Eexo = 22.7 (16.5) kcal/mol), where DFT- and MP4(SDQ)-calculated values are presented without and in parenthesis hereafter. Though the OCH3 group becomes anionic and the H atom becomes proton-like in this activation reaction, population changes more moderately occur than those of the C–H σ-bond activation. This is because the H–OCH3 bond is already polarized in methanol. In the Si–H σ-bond activation, two reaction courses were investigated; in one course, the product is (Me3SiO)2Ti(SiH3)[NH(SiMe3)] in which the H atom and the SiH3 group are bound to the N atom and the Ti center, respectively, while in the other course the product is (Me3SiO)2Ti(H)[N(SiH3)(SiMe3)] in which the H atom and the SiH3 group are bound to the Ti center and the imido N atom, respectively. Though the former reaction occurs with small Ea value and large exothermicity, the latter reaction occurs easier with further smaller Ea value of 2.6 (4.3) kcal/mol and larger Eexo value of 32.5 (34.1) kcal/mol than those of the former reaction. This is because the Ti–H bond energy is much larger than the Ti–SiH3 one. The Si–C σ-bond activation occurs with moderate activation barrier of 19.1 (18.6) kcal/mol and considerably large exothermicity of 33.9 (37.7) kcal/mol. Based on these results, we wish to propose the theoretical prediction that the titanium(IV)–imido complex is useful for O–H, Si–H, and Si–C σ-bond activation reactions.

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19

Reyes, Ronald, and Masaya Sawamura. "An Introductory Overview of C–H Bond Activation/ Functionalization Chemistry with Focus on Catalytic C(sp3)–H Bond Borylation." KIMIKA 32, no. 1 (May 13, 2021): 70–109. http://dx.doi.org/10.26534/kimika.v32i1.70-109.

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The direct and selective functionalization of C–H bonds provides novel disconnections and innovative strategies to streamline the synthesis of molecules with diverse complexities. However, despite the significant advances in the elaboration of techniques for C–H activation, the utilization of unactivated C(sp3)–H bonds remains challenging. In particular, asymmetric transformation of C(sp3)–H bonds is underdeveloped owing to the lack of catalytic systems that can competently discriminate among ubiquitous C–H bonds in organic molecules. This short review aims to outline the challenges and strategies for the catalytic functionalization of C(sp3)–H bonds giving a general and non-exhaustive explanatory approach. Current strategies on the basis of the substrates and reaction mechanisms are summarized in Section 1. Examples of enantioselective C–H bond transformations are then given in Section 2. Finally, in Section 3, an outline of current methodologies towards the direct borylation of C(sp3)–H bonds is described to showcase the importance of developing techniques for catalytic C–H bond chemistry. While we try to cover all excellent reports available in the literature on this topic, any omissions are unintentional, taking note of the most representative examples available.

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20

Ahmed A. El-Sayed, Nahid Y. Khaireldin, and Eman A. El-Hefny. "Review for metal and organocatalysis of heterocyclic C-H functionalization." World Journal of Advanced Research and Reviews 9, no. 1 (January 30, 2021): 001–30. http://dx.doi.org/10.30574/wjarr.2021.9.1.0071.

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Over the last few decades, signiﬁcant efforts have been put forth towards the C−H bond group functionalization by transition-metalcatalysis and organocatalysis. Several efficient strategies to convert C-H bond to other groups C-C, C-N, C-O bonds have been implemented. The most attractive C-H bond functionalization was the C-H heterocyclic compounds activation that is practical method in organic synthesis. The new C–C, C–N and C–O bond as formed from the C-H bond activation by two diverse ways metal catalysis and/or organocatalysis. The most important is the synthesis of new bioactive heterocyclic compounds by easy and less expensive materials. In this review, we will cover most of the syntheses of heterocyclic derivatives by the functionalization of C-H bond in metal and organocatalytic reagents.

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21

Ping, Yuanyuan, Qiuping Ding, and Yiyuan Peng. "Advances in C–CN Bond Formation via C–H Bond Activation." ACS Catalysis 6, no. 9 (August 10, 2016): 5989–6005. http://dx.doi.org/10.1021/acscatal.6b01632.

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22

Davies, H. M. L., and D. Morton. "ChemInform Abstract: C-C Bond Formation by C-H Bond Activation." ChemInform 42, no. 42 (September 27, 2011): no. http://dx.doi.org/10.1002/chin.201142249.

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23

Esteruelas, Miguel A., Montserrat Oliván, and Andrea Vélez. "POP–Rhodium-Promoted C–H and B–H Bond Activation and C–B Bond Formation." Organometallics 34, no. 10 (May 2015): 1911–24. http://dx.doi.org/10.1021/acs.organomet.5b00176.

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24

Chang, S., and J. Lee. "Lactone Heteroannulation by Intramolecular C-H Bond Activation." Synfacts 2006, no. 5 (May 2006): 0439. http://dx.doi.org/10.1055/s-2006-934366.

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25

Wencel-Delord, Joanna, Thomas Dröge, Fan Liu, and Frank Glorius. "Towards mild metal-catalyzed C–H bond activation." Chemical Society Reviews 40, no. 9 (2011): 4740. http://dx.doi.org/10.1039/c1cs15083a.

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26

Lees, Alistair J. "Photochemical features of intermolecular C–H bond activation." Journal of Organometallic Chemistry 554, no. 1 (March 1998): 1–11. http://dx.doi.org/10.1016/s0022-328x(97)00259-3.

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27

Racowski, Joy M., Nicholas D. Ball, and Melanie S. Sanford. "C–H Bond Activation at Palladium(IV) Centers." Journal of the American Chemical Society 133, no. 45 (November 16, 2011): 18022–25. http://dx.doi.org/10.1021/ja2051099.

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28

Scheuermann, Margaret L., David W. Boyce, Kyle A. Grice, Werner Kaminsky, Stefan Stoll, William B. Tolman, Ole Swang, and Karen I. Goldberg. "Oxygen-Promoted CH Bond Activation at Palladium." Angewandte Chemie 126, no. 25 (May 9, 2014): 6610–13. http://dx.doi.org/10.1002/ange.201402484.

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29

Tomin, Anna, Seema Bag, and Bela Torok. "ChemInform Abstract: Catalytic C-H Bond Activation Reactions." ChemInform 44, no. 18 (April 11, 2013): no. http://dx.doi.org/10.1002/chin.201318231.

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30

Varela‐Izquierdo, Víctor, Ana M. Geer, Bas Bruin, José A. López, Miguel A. Ciriano, and Cristina Tejel. "Rhodium Complexes in P−H Bond Activation Reactions." Chemistry – A European Journal 25, no. 69 (November 8, 2019): 15915–28. http://dx.doi.org/10.1002/chem.201903981.

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31

Scheuermann, Margaret L., David W. Boyce, Kyle A. Grice, Werner Kaminsky, Stefan Stoll, William B. Tolman, Ole Swang, and Karen I. Goldberg. "Oxygen-Promoted CH Bond Activation at Palladium." Angewandte Chemie International Edition 53, no. 25 (May 9, 2014): 6492–95. http://dx.doi.org/10.1002/anie.201402484.

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32

Arnold, Polly L., Max W. McMullon, Julia Rieb, and Fritz E. Kühn. "CH Bond Activation by f-Block Complexes." Angewandte Chemie International Edition 54, no. 1 (November 10, 2014): 82–100. http://dx.doi.org/10.1002/anie.201404613.

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33

Liang, Yun, Weizhi Geng, Junnian Wei, Kunbing Ouyang, and Zhenfeng Xi. "Palladium-catalyzed silyl C(sp3)–H bond activation." Organic & Biomolecular Chemistry 10, no. 8 (2012): 1537. http://dx.doi.org/10.1039/c2ob06941e.

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34

Vaheesar, Kandasamy, Timothy M. Bolton, Allan L. L. East, and Brian T. Sterenberg. "Si−H Bond Activation by Electrophilic Phosphinidene Complexes." Organometallics 29, no. 2 (January 25, 2010): 484–90. http://dx.doi.org/10.1021/om900944v.

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35

Yeston, Jake. "Left- or right-handed C–H bond activation." Science 359, no. 6377 (February 15, 2018): 756.10–758. http://dx.doi.org/10.1126/science.359.6377.756-j.

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36

Craescu, Cristina V., Matthew J. Schubach, Steven Huss, and Elizabeth Elacqua. "Metal-free photocatalytic C(sp3)–H bond activation." Trends in Chemistry 3, no. 8 (August 2021): 686–87. http://dx.doi.org/10.1016/j.trechm.2021.05.002.

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37

Yang, Yajie, Jiaqi Huang, Hailu Tan, Lingkai Kong, Mengdan Wang, Yang Yuan, and Yanzhong Li. "Synthesis of cyano-substituted carbazoles via successive C–C/C–H cleavage." Organic & Biomolecular Chemistry 17, no. 4 (2019): 958–65. http://dx.doi.org/10.1039/c8ob03031f.

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38

Blake, Alexander J., Paul J. Dyson, Petra E. Gaede, and Brian F. G. Johnson. "The activation of CH bonds via RuRu bond fission." Inorganica Chimica Acta 241, no. 2 (January 1996): 11–12. http://dx.doi.org/10.1016/0020-1693(95)04984-3.

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39

Chen, Xiao Xia, Yu Bing Si, Bin Xie, and Yong Cheng Wang. "A theoretical view on FeO 2 + -mediated H H bond activation." Journal of Molecular Structure 1139 (July 2017): 231–37. http://dx.doi.org/10.1016/j.molstruc.2017.03.024.

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40

LI, LAI-CAI, JUN-LING LIU, JING SHANG, XIN WANG, and NING-BEW WONG. "THEORETICAL INVESTIGATION ON THE ACTIVATION OF ETHANE VIA NICKEL ATOM CATALYSIS." Journal of Theoretical and Computational Chemistry 06, no. 02 (June 2007): 323–30. http://dx.doi.org/10.1142/s0219633607002976.

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The reaction mechanism of the activation of ethane by nickel atom has been investigated by density functional theory (DFT). The geometries and vibration frequencies of reactants, intermediates, transition states and products have been calculated at the B3LYP/6-311 + +G(d, p) level. Two main pathways, C – C bond activation and C – H bond activation, are identified. In former channel, the rate-limiting step is found to be hydrogen-transferring step with a high barrier of 227 kJ · mol-1. In the C – H bond activation pathway, the second hydrogen-transferring step is the rate-determining step of the whole reaction. The barrier of the step is 71 kJ · mol-1. Our results show that the studied reaction would undergo along C – H bond activation pathway to form the products H 2 molecule and Ni ⋯ethene complex. The present theoretical work indicates that Ni atom is more active than Ni + cation in activating ethane.

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41

Crabtree, Robert H., and Maryellen Lavin. "C–H and H–H bond activation; dissociative vs. nondissociative binding to iridium." J. Chem. Soc., Chem. Commun., no. 12 (1985): 794–95. http://dx.doi.org/10.1039/c39850000794.

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42

Tsoureas, Nikolaos, Jennifer C. Green, and F. Geoffrey N. Cloke. "Bis(pentalene)dititanium chemistry: C–H, C–X and H–H bond activation." Dalton Transactions 47, no. 41 (2018): 14531–39. http://dx.doi.org/10.1039/c8dt02654h.

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43

Hazra, Somjit, Biplab Mondal, Rajendra Narayan De, and Brindaban Roy. "Pd-catalyzed dehydrogenative C–H activation of iminyl hydrogen with the indole C3–H and C2–H bond: an elegant synthesis of indeno[1,2-b]indoles and indolo[1,2-a]indoles." RSC Advances 5, no. 29 (2015): 22480–89. http://dx.doi.org/10.1039/c4ra16661b.

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44

Cheng, Jin-Pei, Jun-Yan Wu, and Jin-Dong Yang. "Applications of bond energies of transition-metal-ligand σ-bonds inC–H bond activation." SCIENTIA SINICA Chimica 51, no. 2 (January 19, 2021): 110–22. http://dx.doi.org/10.1360/ssc-2020-0177.

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45

Suzuki, Hiroharu, Akiko Inagaki, Kouki Matsubara, and Toshifumi Takemori. "Alkane activation on a multimetallic site." Pure and Applied Chemistry 73, no. 2 (January 1, 2001): 315–18. http://dx.doi.org/10.1351/pac200173020315.

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Trinuclear polyhydrido complex of ruthenium effectively activates alkanes to cleave C-H bonds in a selective manner due to cooperative action of the metal centers. The reaction of (Cp´Ru) 3 (m-H) 3 (m3 -H) 2 (1) (Cp´ = h5-C5Me5) with n-alkane at 170 °C leads to the formation of a trinuclear closo-ruthenacyclopentadiene complex as a result of a successive cleavage of six C-H bonds. Introduction of a m3-sulfido ligand into the Ru3 core of the trirutheniumpolyhydrido cluster significantly modifies the regioselectivity of the alkane C-H activation. Heating of a solution of (Cp´Ru) 3 (m3-S) (m-H) 3 (4) in alkane exclusively gives a trinuclear m3-alkylidyne complex via a selective C-H bond cleavage at the less-hindered terminus of alkane molecule.

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46

Kundu, Gargi, V. S. Ajithkumar, Milan Kumar Bisai, Srinu Tothadi, Tamal Das, Kumar Vanka, and Sakya S. Sen. "Diverse reactivity of carbenes and silylenes towards fluoropyridines." Chemical Communications 57, no. 36 (2021): 4428–31. http://dx.doi.org/10.1039/d1cc01401c.

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The activation of the para C–F bond of C₅F₅N by IDipp led to functionalization of all three carbon atoms of the imidazole ring. When the para C–F bond is replaced with a C–H bond, IDipp activates the other C–F bonds leaving the C–H bond intact.

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Meng, Guangrong, and Michal Szostak. "Rhodium-Catalyzed C–H Bond Functionalization with Amides by Double C–H/C–N Bond Activation." Organic Letters 18, no. 4 (February 8, 2016): 796–99. http://dx.doi.org/10.1021/acs.orglett.6b00058.

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Montiel-Palma, Virginia, Miguel A. Muñoz-Hernández, Tahra Ayed, Jean-Claude Barthelat, Mary Grellier, Laure Vendier, and Sylviane Sabo-Etienne. "Agostic Si–H bond coordination assists C–H bond activation at ruthenium in bis(phosphinobenzylsilane) complexes." Chemical Communications, no. 38 (2007): 3963. http://dx.doi.org/10.1039/b709408f.

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Crespo, Margarita, Teresa Calvet, and Mercè Font-Bardia. "Platinum-mediated aryl–aryl bond formation and sp3 C–H bond activation." Dalton Transactions 39, no. 30 (2010): 6936. http://dx.doi.org/10.1039/c0dt00631a.

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Jun, C. H., and J. H. Lee. "Application of C-H and C-C bond activation in organic synthesis." Pure and Applied Chemistry 76, no. 3 (January 1, 2004): 577–87. http://dx.doi.org/10.1351/pac200476030577.

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Journal articles on the topic 'H bond activation'

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