The oxidative addition of I₂ to molybdenum(0) complexes [Mo(CO)₄(L_NC)] (1–3; L_NC1=1‐(benzothiazolin‐2‐yl)‐3‐allyl‐2‐ylidene; L_NC2=1‐(benzothiazolin‐2‐yl)‐3‐benzylimidazol‐2‐ylidene; L_NC3=1‐(benzothiazolin‐2‐yl)‐3‐methylimidazol‐2‐ylidene) afforded the first isolable and crystallographically elucidated seven‐coordinate Mo^II−diiodo complexes, [Mo(CO)₃I₂(L_NC)] (4–6), with N‐heterocyclic carbene (NHC) ligands_. The application of complexes 1–6 as precatalysts for the epoxidation of cis‐cyclooctene with tert‐butyl hydroperoxide (TBHP) as an oxidant has also been studied. Complexes 1–3 performed better than previously reported Mo⁰−carbonyl−NHC complexes, thereby producing the epoxide in 80–90 % yield after 24 h. Complexes 4–6 were superior to complexes 1–3. Complex 5 was the most‐active Mo^II−NHC complex, thereby achieving the epoxide in quantitative yield after 6 h.

中文翻译：

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苯并噻唑-N-杂环碳烯配体及其Mo0前体的七配位MoII-Dioodo配合物：合成，结构及在环-环辛烯环氧化中的催化应用

氧化加成的我₂至钼（0）配合物[沫（CO）₄（L _NC）]（1 - 3 ;大号_NC1 = 1-（苯并噻唑-2-基）-3-烯丙基-2-亚基;大号_NC2 = 1-（苯并噻唑啉-2-基）-3-苄基咪唑-2-亚基; L _NC3 = 1-（苯并噻唑啉-2-基）-3-甲基咪唑-2-亚基提供了第一个可分离且经晶体学阐明的七-坐标沫^II二碘络合物，[沫（CO）₃我₂（L _NC）]（4 - 6）中，用N-杂环卡宾（NHC）配体_。复合物中的应用1 - 6作为预催化剂用于环氧化的顺式-cyclooctene与叔丁基过氧化氢作为氧化剂也进行了研究（TBHP）。配合物1 - 3表现好于先前报道的Mo ⁰ -羰基NHC配合，从而在80-90％的收率得到环氧化物24小时后。配合物4 – 6优于配合物1 – 3。配合物5是最具活性的Mo ^II -NHC配合物，因此在6小时后定量获得了环氧化物。