Synthesis of bis(diphenylphosphino)ethanenickel(II) organodichalcogenide complexes and cyclotrimerisation reaction of dimethylacetylenedicarboxylate:: structure of Ni(dppe)(SC6H4O)

被引:10
作者
Thomas, MS [1 ]
Darkwa, J [1 ]
机构
[1] Univ North, Dept Chem, ZA-0727 Sovenga, South Africa
关键词
nickel(II) complexes; crystal structure; cyclotrimerisation; hexamethylbenzene hexacarboxylate;
D O I
10.1016/S0277-5387(97)00527-5
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Reaction of Ni(dppe)Cl-2 (dppe = bis(diphenylphosphino)ethane) with organodichalcogenide ligands of the type 1,2-HSC6H4EH (E = CO2, O, NH) in the presence of triethylamine to give the products Ni(dppe)(SC6H4CO2) (1), Ni(dppe)(SC6H4O) (2), and Ni(dppe)(SC6H4NH) (3). Complex 2 was characterised by single crystal X-ray diffraction, which shows a distorted geometry. Complexes 1-3 and the dithiolato analogues of 1,2-benzenedithiol, Ni(dppe)(SC6H4S) (4), and 3,4-toluendithiol, Ni(dppe)(SC6H3MeS) (5), upon reflux with dimethylacetylenedicarboxylate (DMAD) formed the cyclotrimeric product hexamethylbenzene hexacarboxylate (HMBC). (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1811 / 1815
页数:5
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