Cyclobutadiene-metal complexes XII. Syntheses and some reactions ofpara-substituted-(tetraphenylcyclobutadiene)palladium halides
作者:D.F. Pollock、P.M. Maitlis
DOI:10.1016/s0022-328x(00)82623-6
日期:1971.2
Cyclobutadiene halide complexes of the type [R4C4PdX2]2 (V, R =p-MeC6H4,p-MeOC6H4) have been prepared from the appropriate acetylenes (RC2R) and (PhCN)2PdCl2. Ligand-transfer reactions to give R4C4Fe(CO)3, [R4C4NiX2]2, [R4C4PdC5H5]+ and [R4C4NiC5H5]+ as well as reactions to give the cyclooctatetraenes (R8C8) and the cyclopentadienones, R4C5O, were carried out. The presence of a π-cyclobutadiene ring
[R 4 C 4 PdX 2 ] 2(V,R = p -MeC 6 H 4,p -MeOC 6 H 4)类型的环丁二烯卤化物配合物是由合适的乙炔(RC 2 R)和(PhCN)制备的2 PdCl 2。进行配体转移反应,得到R 4 C 4 Fe(CO)3,[R 4 C 4 NiX 2 ] 2,[R 4 C 4 PdC 5 H 5] +和[R 4 Ç 4 NIC 5 ħ 5 ] +以及反应,得到cyclooctatetraenes(R 8 C ^ 8)和cyclopentadienones,R 4 Ç 5 O,中进行。的π环丁二烯环的这种类型的复合物的存在下,与R = p -XC 6 ħ 4中,示出通过从所产生的AB四重峰的外观ø -和中号在NMR谱-芳香质子。所述p -anisyl复合物(V,R = p -MeOC 6 ħ 4),没有产生与乙醇的环丁烯基络合物,而具有R = Ph,p -ClC