Synthesis and reactivity of organometallic nickel(II) complexes obtained by oxidation of nickel(0) complexes with halogenated organic compounds
作者:Benedetto Corain、Giancarlo Favero
DOI:10.1039/dt9750000283
日期:——
Reaction of the complexes [Ni(dpb)2][dpb = 1,4-bis(diphenylphosphino)butane] and [Ni(dpp)2][dpp = 1,3-bis(diphenylphosphino)propane] with RCOX (R = Ph or Et; X = Cl or Br) in benzene, in molar ratio 1 : 1, at room temperature, produces nickel(II)-acyl complexes. The spontaneous decomposition of these species produces nickel(II) dihalogenodiphosphino-complexes, nickel(0) monocarbonyldiphosphino-complexes
A Broadly Applicable Strategy for Entry into Homogeneous Nickel(0) Catalysts from Air-Stable Nickel(II) Complexes
作者:Eric A. Standley、Stacey J. Smith、Peter Müller、Timothy F. Jamison
DOI:10.1021/om500156q
日期:2014.4.28
A series of air-stable nickel complexes of the form L2Ni(aryl) X (L = monodentate phosphine, X = Cl, Br) and LNi(aryl)X (L = bis-phosphine) have been synthesized and are presented as a library of precatalysts suitable for a wide variety of nickel-catalyzed transformations. These complexes are easily synthesized from low-cost NiCl2·6H2O or NiBr2·3H2O and the desired ligand followed by addition of 1
已经合成了一系列 L 2 Ni(芳基)X(L = 单齿膦,X = Cl,Br)和 LNi(芳基)X(L = 双膦)形式的空气稳定镍配合物,并表示为适用于各种镍催化转化的预催化剂库。这些配合物很容易由低成本的 NiCl 2 ·6H 2 O 或 NiBr 2 ·3H 2合成O 和所需的配体,然后加入 1 当量的格氏试剂。选择的这些配合物通过单晶 X 射线衍射进行了表征,并提供了对其结构特征的分析。介绍了将它们用作镍催化羰基-烯反应的预催化剂的案例研究,与使用 Ni(cod) 2 的反应相比,显示出优异的反应性。此外,由于预催化剂都对空气稳定,因此不需要手套箱或惰性气氛技术来利用这些配合物进行镍催化反应。