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    Hypervalent Compounds as Ligands: I 3 -Anion Adducts with Transition Metal Pentacarbonyls

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    Type
    Article
    Authors
    Rogachev, Andrey Yu.
    Hoffmann, Roald
    KAUST Grant Number
    CHE-0910623
    Date
    2013-05-31
    Online Publication Date
    2013-05-31
    Print Publication Date
    2013-06-17
    Permanent link to this record
    http://hdl.handle.net/10754/598542
    
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    Abstract
    Just a couple of transition metal complexes of the familiar triiodide anion are known. To investigate the bonding in these, as well as isomeric possibilities, we examined theoretically adducts of I3 - with model organometallic fragments, [Cr(CO)5] and [Mn(CO) 5]+. Bonding energy computations were augmented by a Natural Bond Orbital (NBO) perturbation theory analysis and Energy Decomposition Analysis (EDA). The bonding between I3 - and the organometallic fragment is substantial, especially for the electrostatically driven anion-cation case. "End-on" coordination is favored by 5-13 kcal/mol over "side-on" (to the central I of I3 -), with a ∼10 kcal/mol barrier for isomerization. A developing asymmetry in the I-I bonding of "end-on" coordinated I 3 - led us to consider in some detail the obvious fragmentation to a coordinated I- and free I2. While the signs of incipient fragmentation in that direction are there, these is a definite advantage to maintaining some I- to I2 bonding in triiodide complexes. © 2013 American Chemical Society.
    Citation
    Rogachev AY, Hoffmann R (2013) Hypervalent Compounds as Ligands: I 3 -Anion Adducts with Transition Metal Pentacarbonyls . Inorg Chem 52: 7161–7171. Available: http://dx.doi.org/10.1021/ic400772u.
    Sponsors
    Our work was supported by the National Science Foundation, Research Grant CHE-0910623. Computational facilities provided by KAUST (King Abdullah University of Science and Technology) Supercomputing Laboratory are gratefully acknowledged.
    Publisher
    American Chemical Society (ACS)
    Journal
    Inorganic Chemistry
    DOI
    10.1021/ic400772u
    PubMed ID
    23725645
    ae974a485f413a2113503eed53cd6c53
    10.1021/ic400772u
    Scopus Count
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