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Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR
Published on: December 16, 2013
Side-on coordination of boryl and borylene complexes to cationic coinage metal fragments
Holger Braunschweig1, Krzysztof Radacki1, Rong Shang1
1Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
Abstract:
The M-(η2-BMn) complex [(η5-C5H5)(OC)2Mn{μ-B(Cl)(tBu)Au(PPh3)}] (2) can be functionalized via halide substitution reactions to afford isostructural complexes [(η5-C5H5)(OC)2Mn{μ-B(R)(tBu)Au(PPh3)}] (R = Ph, CCPh and NCS). It also reacts with coinage metal complexes [MCl(PPh3)] (M = Au, Ag and Cu) in the presence of halide abstraction reagents to afford borylene-bridged heteromultinuclear complexes [{(η5-C5H5)(OC)2Mn}2{μ2-B(tBu)}2M][BArx4] (M = Au, Ag and Cu; Arx = 3,5-C6H3Cl2, 3,5-C6H3(CF3)2). Experimental characterization as well as computational studies revealed that these complexes are best viewed as transition metal borylene complexes side-on coordinated to monovalent coinage metal cations, thus representing the first boron analogs of Stone's alkylidyne-bridged multinuclear complexes.
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