Synthesis of Vanadium Oxo Alkylidene Complex and Its Reactivity in Ring-Closing Olefin Metathesis Reactions
作者:Dmitry S. Belov、Didac A. Fenoll、Indranil Chakraborty、Xavier Solans-Monfort、Konstantin V. Bukhryakov
DOI:10.1021/acs.organomet.1c00425
日期:2021.9.13
V imido alkylidenes have been applied for the ring-opening metathesis polymerization involving cyclic olefins. However, those complexes found limited application in reactions with acyclic terminal olefins due to instability toward ethylene. Experimental and theoretical studies show that the β-hydride elimination from unsubstituted metallacyclobutene is the primary decomposition pathway in those systems
Viimido 亚烷基已被用于涉及环烯烃的开环复分解聚合反应。然而,由于对乙烯的不稳定性,这些配合物在与无环末端烯烃的反应中的应用受到限制。实验和理论研究表明,未取代金属环丁烯的 β-氢化物消除是这些系统中的主要分解途径。在此,我们报告的第一催化活性V的合成氧代亚烷基,VO(CHSiMe 3)(PET 3)2氯,其显示出与已知的V催化剂中闭环复分解反应的各种末端烯烃最高报生产率。提出的 DFT 研究表明,β-氢化物消除明显不利于 V oxo 物种。
Phosphinidene group-transfer with a phospha-Wittig reagent: a new entry to transition metal phosphorus multiple bonds
作者:Uriah J. Kilgore、Hongjun Fan、Maren Pink、Eugenijus Urnezius、John D. Protasiewicz、Daniel J. Mindiola
DOI:10.1039/b910410k
日期:——
The phosphanylidene-σ4-phosphorane reagents Me3PPAr (Ar = 2,4,6-tBu3C6H2 and 2,6-Mes2C6H3) are good delivery vehicles of the terminal phosphinidene moiety, PAr, to early-transition metals composed of zirconium and vanadium.
膦亚基-σ4-正膦试剂 Me3PPAr(Ar = 2,4,6-tBu3C6H2 和 2,6-Mes2C6H3)是末端亚膦基部分 PAr 向由锆和钒组成的早期过渡金属的良好递送载体。
A Transient VIII–Alkylidene Complex: Oxidation Chemistry Including the Activation of N2 to Afford a Highly Porous Honeycomb-Like Framework
作者:Uriah J. Kilgore、Caitlin A. Sengelaub、Maren Pink、Alison R. Fout、Daniel J. Mindiola