Kinetic Destabilization of Metal–Metal Single Bonds: Isolation of a Pentacoordinate Manganese(0) Monoradical. (2nd September 2015)

• Record Type: Journal Article
• Authors: Agnew, Douglas W.; Moore, Curtis E.; Rheingold, Arnold L.; Figueroa, Joshua S.
• Is Part Of: Angewandte Chemie. Volume 127:Number 43(2015)
• Page Start: 12864
• Page End: 12868
• Publication Date: 2015-09-02
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201506498
• Languages: English
• ISSNs: 0044-8249

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The 17e⁻ monoradical [Mn(CO)₅] is widely recognized as an unstable organometallic transient and is known to dimerize rapidly with the formation of a MnMn single bond. As a result of this instability, isolable analogues of [Mn(CO)₅] have remained elusive. Herein, we show that two sterically encumbering isocyanide ligands can destabilize the MnMn bond leading to the formation of the isolable, manganese(0) monoradical [Mn(CO)₃(CNAr^Dipp2)₂] (Ar^Dipp2=2, 6‐(2, 6‐(<italic>i</italic>Pr)₂C₆H₃)₂C₆H₃). The persistence of [Mn(CO)₃(CNAr^Dipp2)₂] has allowed for new insights into nitrosoarene spin‐trapping studies of [Mn(CO)₅].</p> </abstract>