Nickel(ii) complexes of tripodal 4N ligands as catalysts for alkane oxidation using m-CPBA as oxidant: ligand stereoelectronic effects on catalysis
作者:Mani Balamurugan、Ramasamy Mayilmurugan、Eringathodi Suresh、Mallayan Palaniandavar
DOI:10.1039/c1dt10902b
日期:——
[Ni(L4)(CH3CN)2](BPh4)24 have been determined. All these complexes possess a distorted octahedral coordination geometry in which Ni(II) is coordinated to four nitrogen atoms of the tetradentate ligands and two CH3CN (2, 3, 4) or one H2O and one CH3CN (1a) are located in cis positions. The Ni–Npy bond distances (2.054(2)–2.078(3) Å) in 1a, 2 and 3 are shorter than the Ni–Namine bonds (2.127(2)–2.196(3) Å) because
[Ni(L)(CH 3 CN)2 ](BPh 4)2 1–7类型的几种单核Ni(II)配合物,其中L是四齿三脚架4N配体,例如N,N-二甲基-N ',N'-双(吡啶-2-基甲基)乙烷-1,2-二胺(L1),N,N-二乙基-N ',N'-双(吡啶-2-基甲基)乙烷-1,2-二胺(L2),N,N,-二甲基-N ′-(1-甲基-1H-咪唑-2-基甲基)-N ′-(吡啶-2-基甲基)乙烷-1,2-二胺(L3),N,N-二甲基-N ',N'-双(1-甲基-1H-咪唑-2-基甲基)乙烷-1,2-二胺(L4),N,N-二甲基-N ',N'-双(喹啉-2-基甲基)乙烷-1,2-二胺(L5),三(苯并咪唑-2-基甲基)胺(L6)和三(吡啶-2-基甲基)胺(L7)已使用CHN分析,UV-可见光谱和质谱进行了分离和表征。配合物[Ni(L1)(CH 3 CN)(H 2 O)](ClO 4)2 1a,[Ni(L2)(CH