Metal Dihydrogen and σ-Bond Complexes

Interconversion of Quadruply and Quintuply Bonded Molybdenum Complexes by Reductive Elimination and Oxidative Addition of Dihydrogen

“…Herein we describe that the quadruply bonded dimolybdenum dihydride complex [Mo 2 (H) 2 addition of dihydrogen, two ubiquitous reactions in transition metal chemistry. [25] We also show in Scheme 2 that compound 3 reacts reversibly (thermally or with light irradiation) with aromatic solvents like benzene and toluene, to yield the corresponding adducts,…”

Amine–Borane Dehydropolymerization: Challenges and Opportunities

“…[6] In overall catalytic dehydropolymerization, the initial dehydrogenation is am etal-promoted process and can potentially proceed by one of three established routes:( i) inner sphereB H/NH activation,( ii)ligand assisted cooperative mechanisms or (iii)hydride abstraction/boronium cocatalysis (Scheme4). The formation of s-amine-borane complexes, which have three-center-two-electronM ···HÀBi nteractions, [59] is central to many of these mechanisms. For scenarios (i)a nd (ii)B ÀHa nd NÀHa ctivation can proceed stepwise in either order,w ith NÀHa ctivation [35,36] often (althoughn ot exclusively) the turnover limiting step, or in ac oncerted manner.…”

Scorpionate‐Type Coordination in MFU‐4l Metal–Organic Frameworks: Small‐Molecule Binding and Activation upon the Thermally Activated Formation of Open Metal Sites

“…[4] However, most known MOFs with free metal centers are only able to bind typical Lewis bases, such as CO 2 or H 2 O, whereas the activation of unreactive small molecules, such as O 2 , N 2 , and H 2 , still remains a challenge. Molecular dioxygen, [5] dinitrogen, [5] and dihydrogen [6] complexes have attracted significant attention in coordination chemistry. Only very few stable MOFs with open metal centers have been described that are able to bind these molecules.…”