REACTION OF (1,4-DIAZABUTADIENE)BIS(ALKENE)NICKEL(0) COMPLEXES WITH ETHYNE

被引:16
作者
BONRATH, W [1 ]
MICHAELIS, S [1 ]
PORSCHKE, KR [1 ]
GABOR, B [1 ]
MYNOTT, R [1 ]
KRUGER, C [1 ]
机构
[1] MAX PLANCK INST COAL RES,POSTFACH 10 13 53,W-4330 MULHEIM,GERMANY
关键词
D O I
10.1016/0022-328X(90)80244-T
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The (1,4-diazabutadiene)bis(alkene)nickel(0) complexes (iPr2Ph)2-dadNi(C2H4)2 [(iPr2Ph)2-dad = 2,6-iPr2C6H3-NCHCHN-C6H3-2,6-iPr2] (1) and (iPr2 Ph)2-dadNi(η2,η2-C6H10) (2) react with ethyne above -100°C (1) or -30°C (2) with coupling of two ethyne molecules to afford the dinuclear complex [(iPr2Ph)2- dadNi]2(C4H4) (3) which contains a ferrol-type nickelacyclopentadiene-nickel(0) bonding element. A single-crystal X-ray structure study of 3 revealed strongly distorted coordination geometries of the nickel centers, which are also present in solution at low temperature (1H, 13C-NMR). At higher temperatures dynamic processes take place by which the coordinative distortions at the nickel centers are reversed and the bonding situations of the nickel atoms are exchanged. However, a rotation of the phenyl groups around the NC bonds can be excluded. Similarly, [(Me2Ph)2-dadNi]2(C4H4) (4) has been obtained and characterized. © 1990.
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页码:255 / 260
页数:6
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