Double Tethered Metallacyclobutane Catalyst for Cyclic Polymer Synthesis.

This work outlines an approach to creating a catalyst for cyclic polymer synthesis using readily available materials in only one or two steps. Combining commercially available molybdenum-alkylidene with two equivalents of ene-ol proligand rapidly produces, in quantitative yield (H NMR spectroscopy), the double tethered metallacyclobutane complex . Characterized by variable temperature NMR studies and nuclear Overhauser effect spectroscopy (NOESY) experiments, complex exhibits fluxional behavior in solution.

Ammonia Synthesis through Hydrolysis of a Trianionic Pincer Ligand-Supported Molybdenum-Nitride Complex.

Reported is the hydrolysis of a homogeneous Mo-nitride complex bearing a trianionic pincer-type ligand to produce ammonia. Treating the anionic [(ONO)]Mo≡N(OtBu)]Ph PCH with two equivalents of water produces ammonia and the dioxo complex [(ONO)]MoO ]Ph PCH . X-Ray crystal structures of the starting nitrido complex and product dioxo complex are presented.

Hg(ii) and Pd(ii) complexes with a new selenoether bridged biscarbene ligand: efficient mono- and bis-arylation of methyl acrylate with a pincer biscarbene Pd(ii) precatalyst.

Two equivalents of 1-benzyl-3-bromoethylbenzimidazolium bromide couple with NaSe to produce the first selenoether bridged bis-benzimidazolium salt (LH)Br. The nitrate (LH)(NO) and tetrafluoroborate (LH)(BF) salts were also synthesized from (LH)Br. The reaction of Hg(OAc) with (LH)Br gave the first pseudo pincer carbene mercury complex, [Hg(L-κC)][HgBr] (C1).