The cobalt phenylthiolate complex, cis,mer-(PMe3)3Co(CH3)2SPh, was found to undergo competitive two-electron ethane reductive elimination and CâH bond cyclometallation. The thiophenolato bound cobaltacycle was generated via CâH bond oxidative addition to a five-coordinate intermediate followed by rapid methane elimination. A related cobalt isothiocyanate complex, cis,mer-(PMe3)3Co(CH3)2NCS, was also prepared and found to perform ethane elimination and S-atom transfer to yield trimethylphosphine sulfide. This rare example of S-atom donation from a isothiocyanate was characterized by NMR and GC-MS analysis, with cis,mer-(PMe3)3Co(CH3)2CN identified as one of the cobalt based products.
苯硫醇钴络合物(顺式,mer-(PMe3)3Co(
CH3)2
SPh)被发现可进行竞争性二电子
乙烷还原消除和C-H键环
金属化反应。
噻吩醇
钴络合物通过C-H键氧化加成到五配位中间体,然后快速消除
甲烷而生成。还制备了相关的异
硫氰酸钴络合物(顺式,mer-(PMe3)3Co( )2
NCS),发现其可进行
乙烷消除和S原子转移,生成三甲基
硫磷。通过核磁共振和气相色谱-质谱分析,确定了异
硫氰酸酯S原子供体的这一罕见实例,顺式,mer-(PMe3)3Co( )2CN被确定为
钴基产物之一。