Yttrium-Benzyl Complexes Bearing Chiral Iminophosphonamide Ligands: Synthesis and Application in Catalytic Asymmetric Amine-Silane Dehydrocoupling Reactions
作者:Nan Li、Bing-Tao Guan
DOI:10.1002/adsc.201700327
日期:2017.10.25
A series of novel iminophosphonamide ligands with chiral diamine moieties were designed and synthesized. Yttrium–benzyl compounds bearing these chiral iminophosphonamide ligands showed high reactivity and selectivity on the first catalytic asymmetric cross‐dehydrogenative coupling of amines with prochiral silanes under mild conditions. A stable silylamine–boron derivative was synthesized in up to 23%
A tetranuclear calcium hydride cluster with a highly symmetric [Ca<sub>4</sub>H<sub>6</sub>]<sup>2+</sup> core
作者:Danny Schuhknecht、Thomas P. Spaniol、Iskander Douair、Laurent Maron、Jun Okuda
DOI:10.1039/c9cc08540h
日期:——
A highly symmetric, dicationic tetranuclear calcium hydridecluster with an adamantoid [Ca4H6]2+ core stabilized by the NNN macrocycle Me3TACN (1,4,7-trimethyl-1,4,7-triazacyclononane) was prepared. DFT calculations indicate delocalized bonding within the [Ca4H6]2+ fragment with d-orbital contribution.
制备了具有对称金红石[Ca 4 H 6 ] 2+核的高对称性,双官能的四氢氢化钙簇,该核被NNN大环Me 3 TACN(1,4,7-三甲基-1,4,7-三氮杂环壬烷)稳定。DFT计算表明[Ca 4 H 6 ] 2+片段内具有d轨道贡献的离域键合。