the complex formed by insertion of an electrogenerated nickel(0) atom into the carbon—halogen bond of a p-halogeno-substituted aromaticcompound in the presence of CO2 leads to formation of the corresponding aromaticcarboxylate. At room temperature the electrochemical synthesis needs catalytic quantities of nickel chloride coordinated to triphenylphosphine or 1,2-bis(diphenylphosphino)ethane.
fragments. An initial emission at 615 nm detected by irradiating Pd(PPh 3 ) 2 (N 3 ) 2 at 77 K is explained by assuming a photochemical cis/trans isomerizationQuenching experiments have been performed by using Ru(bpy) 3 Cl 2 , Os(bpy) 3 Cl 2 , Re(CO) 3 (phen)Cl and Cr(bpy) 3 (ClO 4 ) 3 as sensitizers and the mixed-ligand complexes under discussion as quenchers.
摘要通过电子光谱法对ML n(N 3)2型混合配体配合物(MNi,Pd,Pt; L =膦配体和二膦配体; n = 1、2)的光解进行了吸收,发射的监测。和激发。这些配合物的初始量子产率在CH 2 Cl 2和EtOH中根据辐照波长进行测量。Pd和Pt的光化学形成的MOI n片段的特征在于在77 K下检测到强烈发射。对于合适的Ni O片段,未观察到发射。通过假设光化学是顺式/反式异构化,解释了通过使用Ru(bpy)3 Cl 2,Os( bpy)3 Cl 2,
Evaluating a Dispersion of Sodium in Sodium Chloride for the Synthesis of Low‐Valent Nickel Complexes**
作者:Elliot L. B. Johnson Humphrey、Alan R. Kennedy、Stephen Sproules、David J. Nelson
DOI:10.1002/ejic.202101006
日期:2022.3.9
sodium chloride is evaluated for the synthesis of nickel(I) complexes from the corresponding nickel(II) dichloride precursors. A variety of complexes with phosphine and bipyridine-type ligands were accessed, although some reactions were found to produce mixtures of nickel(0) and nickel(I), and yields were highly variable. Several new nickel(I) complexes were obtained and characterized using various techniques
Carbonyl difluoride: reactions with metal-phosphine complexes
作者:O.D. Gupta、Robert L. Kirchmeier、Jean'ne M. Shreeve
DOI:10.1016/s0022-1139(00)80316-4
日期:1991.4
Br− and I−, n = 1, 2] were allowed to react with carbonyl difluoride under homogeneous and heterogeneous conditions at ambient temperature or above. The dpm ligands of [Ni(dpm)]X2 and [Ni(dpm)2]X2 were oxidatively fluorinated to the phosphorane but the complexes of the composition [Ni(dpe)]X2 and [Ni(dpp)]X2 did not react with carbonyl difluoride under any conditions tried. The 1:2 complexes [Ni(dpe)2]X2
组成为[Ni(L)n ] X 2 [L =双(二苯基膦基)甲烷(dpm),1,2-双(二苯基膦基)乙烷(dpe)和1,3-双(二苯基膦基)丙烷(dpp)的镍配合物),X =氯- ,溴-和我-中,n = 1,2,...]被允许在环境温度下或高于均质和非均质的条件下与羰基二氟化反应。[Ni(dpm)] X 2和[Ni(dpm)2 ] X 2的dpm配体被氧化氟化为磷烷,但组成为[Ni(dpe)] X 2和[Ni(dpp)] X的配合物2在任何尝试的条件下均未与二氟化羰基反应。1:2络合物[Ni(dpe)2 ] X 2和[Ni(dpp)2 ] X 2在25°C下与二氟化碳在CH 2 Cl 2中反应,形成氟化的磷烷和1:1络合物[Ni(dpe)] X 2和[Ni(dpp) )] X 2。发现二氟羰基与中性络合物[Ni(dpp)2 ]和[Ni(dpe)2 ]反应,得到化学计量的氧化氟化磷烷。