one molecule of C2Me2. This provides evidence that a fine balance of the softness at W is important for acetylene coordination. Upon dissolving complex 8 in acetonitrile complex 13 is reconstituted in contrast to 9. All complexes exhibit the desired stability toward water and the observed effective coordination of the scorpionate ligand avoids decomposition to disulfide, an often‐occurring reaction in
一系列具有富
硫配体氢化三(2-巯基-1-甲基
咪唑基)
硼酸酯) (Tm Me ) 的 W IV炔配合物作为仿生模型被提出,以阐明
钨酶
乙炔水合酶 (AH) 的机制。单炔和/或双炔前体与NaTm Me反应,所得络合物[W(CO)(C 2 R 2 )(Tm Me )Br](R=H 1 , Me 2 )被氧化为目标物[ WE(C 2 R 2 )(Tm Me )Br] (E=O, R=H 4 , Me 5 ; E=S, R=H 6 , Me 7 ) 使用
吡啶-N-氧化物和甲基
硫杂丙环。在 MeCN 中用 TlOTf 萃取卤化物得到阳离子配合物 [WE(C 2 R 2 )(MeCN)(Tm Me )](OTf) (E=CO, R=H 10 , Me 11 ; E=O, R=H 12 ,Me 13 ;E=S,R=H 14 ,Me 15 )。没有 MeCN,双核配合物 [W 2 O(μ-O)(C 2 Me 2