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  1. Article ; Online: Radical-Polar Crossover Catalysis with a d

    Gavin, Joshua T / Belli, Roman G / Roberts, Courtney C

    Journal of the American Chemical Society

    2022  Volume 144, Issue 47, Page(s) 21431–21436

    Abstract: Radical-polar crossover mechanisms are invoked in numerous late transition metal and photocatalyzed reactions. To the best of our knowledge, reductive radical-polar crossover mechanisms are not invoked for group 3 early transition metals due to their ... ...

    Abstract Radical-polar crossover mechanisms are invoked in numerous late transition metal and photocatalyzed reactions. To the best of our knowledge, reductive radical-polar crossover mechanisms are not invoked for group 3 early transition metals due to their propensity to exist in high oxidation states. Through use of a redox-active (tris)amido ligand we have accessed this mechanism for use with early transition metals. This mechanism is showcased through enabling product formation for a wide variety of elimination products from α-halo substituted benzylic bromides. The mechanism of this new type of reactivity with Sc is explored, and Hammett analysis reveals an anionic intermediate. The wide functional group tolerance of this reaction is also demonstrated.
    MeSH term(s) Ligands ; Catalysis ; Oxidation-Reduction ; Metals ; Transition Elements
    Chemical Substances Ligands ; Metals ; Transition Elements
    Language English
    Publishing date 2022-11-16
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.2c09114
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

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  2. Article ; Online: Nickel binding enables isolation and reactivity of previously inaccessible 7-aza-2,3-indolynes.

    Humke, Jenna N / Belli, Roman G / Plasek, Erin E / Kargbo, Sallu S / Ansel, Annabel Q / Roberts, Courtney C

    Science (New York, N.Y.)

    2024  Volume 384, Issue 6694, Page(s) 408–414

    Abstract: N-Heteroaromatics are key elements of pharmaceuticals, agrochemicals, and materials. N-Heteroarynes provide a scaffold to build these essential molecules but are underused because five-membered N-heteroarynes have been largely inaccessible on account of ... ...

    Abstract N-Heteroaromatics are key elements of pharmaceuticals, agrochemicals, and materials. N-Heteroarynes provide a scaffold to build these essential molecules but are underused because five-membered N-heteroarynes have been largely inaccessible on account of the strain of a triple bond in that small of a ring. On the basis of principles of metal-ligand interactions that are foundational to organometallic chemistry, in this work we report the stabilization of five-membered N-heteroarynes in the nickel coordination sphere. A series of 1,2-bis(dicyclohexylphosphino)ethane nickel 7-azaindol-2,3-yne complexes were synthesized and characterized crystallographically and spectroscopically. Ambiphilic reactivity of the nickel 7-azaindol-2,3-yne complexes was observed with multiple nucleophilic, electrophilic, and enophilic coupling partners.
    Language English
    Publishing date 2024-04-25
    Publishing country United States
    Document type Journal Article
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.adi1606
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

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  3. Article ; Online: Exploring Electrophilic Hydrophosphination via Metal Phosphenium Intermediates.

    Belli, Roman G / Muir, Vanessa / Dyck, Nicholas B / Pantazis, Dimitrios A / Sousa, Tânia P A / Slusar, Carly R / Parkin, Hayley C / Rosenberg, Lisa

    Chemistry (Weinheim an der Bergstrasse, Germany)

    2024  Volume 30, Issue 16, Page(s) e202302924

    Abstract: Two Mo(0) phosphenium complexes containing ancillary secondary phosphine ligands have been investigated with respect to their ability to participate in electrophilic addition at unsaturated substrates and subsequent P-H hydride transfer to "quench" the ... ...

    Abstract Two Mo(0) phosphenium complexes containing ancillary secondary phosphine ligands have been investigated with respect to their ability to participate in electrophilic addition at unsaturated substrates and subsequent P-H hydride transfer to "quench" the resulting carbocations. These studies provide stoichiometric "proof of concept" for a proposed new metal-catalyzed electrophilic hydrophosphination mechanism. The more strongly Lewis acidic phosphenium complex, [Mo(CO)
    Language English
    Publishing date 2024-02-01
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1478547-X
    ISSN 1521-3765 ; 0947-6539
    ISSN (online) 1521-3765
    ISSN 0947-6539
    DOI 10.1002/chem.202302924
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  4. Article ; Online: Reversible Silylium Transfer between P-H and Si-H Donors.

    Belli, Roman G / Pantazis, Dimitrios A / McDonald, Robert / Rosenberg, Lisa

    Angewandte Chemie (International ed. in English)

    2020  Volume 60, Issue 5, Page(s) 2379–2384

    Abstract: ... The Mo= ... ...

    Abstract The Mo=PR
    Language English
    Publishing date 2020-12-01
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.202011372
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  5. Article ; Online: A thermolytic route to a polysilyne.

    Lee, Peter T K / Samedov, Kerim / Belli, Roman G / Clarke, C Jonathan / Gates, Derek P / Rosenberg, Lisa

    Chemical communications (Cambridge, England)

    2020  Volume 56, Issue 90, Page(s) 14063–14066

    Abstract: We report a safe and convenient method to prepare a new class of network polysilane, or polysilyne ([RSi] ...

    Abstract We report a safe and convenient method to prepare a new class of network polysilane, or polysilyne ([RSi]
    Language English
    Publishing date 2020-10-26
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/d0cc05843b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Competitive Ligand Exchange and Dissociation in Ru Indenyl Complexes.

    Belli, Roman G / Wu, Yang / Ji, Hyewon / Joshi, Anuj / Yunker, Lars P E / McIndoe, J Scott / Rosenberg, Lisa

    Inorganic chemistry

    2018  Volume 58, Issue 1, Page(s) 747–755

    Abstract: Kinetic profiles obtained from monitoring the solution-phase substitution chemistry of [Ru( ... ...

    Abstract Kinetic profiles obtained from monitoring the solution-phase substitution chemistry of [Ru(η
    Language English
    Publishing date 2018-12-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.8b02915
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