摘要含有非不稳定双齿恶唑啉基吡啶配体1的二氧杂和氧过氧钼(VI)配合物I-III在环辛烯和(R)-柠檬烯的环氧化中用作催化前体,以探索催化性质物种。I和II对柠檬烯环氧化物形成的高非对映选择性(反式/顺式-8 = 4/1)可以通过观察到的动力学拆分得到双环氧化物(9)来证明,也可以通过烯烃与金属中心的配位来证明。由于存在不稳定的配体(异硫氰酸酯)。在(R)-柠檬烯存在下,配合物II的95 Mo NMR监测实验以及电导率测量结果表明,形成了离子金属物种(1:1电解质)。
P∧N versus N∧N ligands for the palladium-catalyzed alternating copolymerization of styrene and carbon monoxide
作者:Anton Aeby、Giambattista Consiglio
DOI:10.1016/s0020-1693(99)00302-3
日期:1999.12
modified by C1-symmetric chelate ligands containing the 3-phenyl-4-methoxymethyl-4,5-dihydrooxazole chiral moiety and either 2-pyridyl or 2-diphenylphosphinophenyl substituents, catalyze the copolymerization of styrene with carbonmonoxide with either a prevailingly syndiotactic or isotactic microstructure, respectively. This and other results obtained with several ligands are interpreted on the basis
Structural Studies of Mono‐ and Dimetallic Mo
<sup>VI</sup>
Complexes − A New Mechanistic Contribution in Catalytic Olefin Epoxidation Provided by Oxazoline Ligands
作者:José A. Brito、Montserrat Gómez、Guillermo Muller、Helena Teruel、Jean‐Claude Clinet、Elisabet Duñach、Miguel A. Maestro
DOI:10.1002/ejic.200400331
日期:2004.11
New seven-coordinate oxo(peroxo)molybdenum(VI) complexes with bidentate chiral oxazolines, anionic κ 2 -N,O (V) and neutral κ 2 -N,N (VI), have been prepared and fully characterised by NMR spectroscopy and single-crystal X-ray diffraction studies. Dimetallic dioxo(µ-oxo)molybdenum(VI) compounds containing oxazolinylpyridine ligands II−IV have also been synthesised. NMR studies showed the presence of