Mixed phosphine/carbonyl derivatives of heterobimetallic copper–iron and copper–tungsten catalysts
Mixed phosphine/carbonyl derivatives of heterobimetallic copper–iron and copper–tungsten catalysts
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DOI：
10.1016/j.poly.2018.09.062
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发表时间：
2019
期刊：
影响因子：
2.6
通讯作者：
Noel J. Leon;Hsien‐Cheng Yu;T. J. Mazzacano;Neal P. Mankad
中科院分区：
文献类型：
--
作者：
Noel J. Leon;Hsien‐Cheng Yu;T. J. Mazzacano;Neal P. Mankad
观察到质子型金属氢化物络合物FeCp(CO)(Pr3)H和WCp∗(CO)2(Pr3)H与氢化(Nhc)∗(CO)(Pr3)(Pr3)和(Nhc)CuWCp(CO)2(Pr3)的反应，提供了几种异双金属(Nhc)Cu-FeCp(CO)(Pr3)和(Nhc)CuWCp(CO)2(Pr3)的混合膦/酮基衍生物，用于催化单键H硼化反应(nhc =N-杂环卡宾)。用多核核磁共振谱、傅立叶变换红外光谱和某些情况下的X射线结晶学对新化合物进行了表征。在一种情况下，(NHC)Cu(µ2-H)2FeCp(PPh3)配合物的结构被表征为不稳定的(NHC)Cu-FeCp(CO)(PPh3)衍生物的分解产物。报道了单键H硼化催化剂的初步实验，包括在光化学条件下的可测量的活性。
Evolution of dihydrogen was observed from reactions of protic metal–hydride complexes FeCp(CO)(PR3)H and WCp∗(CO)2(PR3)H with hydridic (NHC)CuH complexes, providing access to several heterobimetallic (NHC)Cu–FeCp(CO)(PR3) and (NHC)Cu–WCp∗(CO)2(PR3) complexes that are the mixed phosphine/carbonyl derivatives of previously studied catalysts for Csingle bondH borylation (NHC =N-heterocyclic carbene). The new complexes were characterized by multinuclear NMR spectroscopy, FT-IR spectroscopy, and in some cases X-ray crystallography. In one case, a (NHC)Cu(µ2-H)2FeCp(PPh3) complex was structurally characterized as the decomposition product of an unstable (NHC)Cu–FeCp(CO)(PPh3) derivative. Preliminary trials in Csingle bondH borylation catalysis are reported, including measurable activity under photochemical conditions.