d6 and d8 Metal Carbonyl Complexes of 7,7-Dimethoxy-5,6-dimethylidenebicyclo[2.2.1]hept-2-ene. Stereoselective Hydroformylation of an [Fe(CO)4(olefin)] Complex
作者:Jacques Loset、Raymond Roulet
DOI:10.1002/hlca.19850680130
日期:1985.2.13
position. In all the η2-complexes, this double bond is stereospecifically coordinated by its exo-vs. endo-η4-Fe(CO)3 configuration was established by chemical correlation (hydrolysis, hydrogenation) with the corresponding complexes (24x, 24n) of 7,7-dimethoxy-2,3-dimethylidenebicyclo[2.2.1]heptane (5). The relative rates of hydrolysis (AcOH/H2O 2:1, 50°C) of ligands 2 and 5 and of complexes 19x, 19n, 24x
7,7-二甲氧基-5,6- dimethylidenebicyclo [2.2.1]庚-2-烯(反应2)与各种金属羰基化合物以及它们的衍生物,得到η 2 -M(CO)4(M = Fe(上17) ,钌(18)),η 4 -M(CO)3(M = Fe(上19X,19N),钌(20N)),以及η 2 -M(CO)5和η 6 -M(CO)3( M = Cr,Mo,W)络合物。的三角双锥η 2 -M(CO)4个配合物呈现一个特殊的C ^ 3 v在轴向位置具有C,C-双键的金属上的对称性。在所有的η 2 -complexes,这个双键立体特异性由其协调外-与内-η 4 -Fe(CO)3构型由化学相关性(水解,氢化)建立了与相应的复合物(24X,24N) 7,7-二甲氧基-2,3-二甲叉基双环[2.2.1]庚烷(5)。配体2和5以及配合物19x,19n,24x和24n的相对水解速率(AcOH / H 2