State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Jiangsu, China.
Dalton Trans. 2011 Mar 14;40(10):2306-13. doi: 10.1039/c0dt00933d. Epub 2010 Nov 12.
The 16e half-sandwich complex CpCo(S(2)C(2)B(10)H(10))(1, Cp = pentamethylcyclopentadienyl) reacts with N-1-naphthylpropargylamide to afford two 18e complexes (2) and (3). 2 is a 1 : 1 adduct containing a four-membered metallacycle. In 3 the alkyne is twofold inserted into one Co-S bond in a head-head mode. Reactions of 1 with 1-(2-furyl)-2-propyn-1-one and 1-ferrocenyl-2-propyn-1-one lead to two types of alkyne twofold inserted products (4)/(5) and (6)/(7), respectively. The reaction of 1 with phenylacetylene gives rise to the sole complex (8) of the same structural type as 3, 4 and 6, whereas the reaction of 1 with dimethyl acetylene dicarboxylate affords the sole 1 : 1 adduct (9). Complexes 2-9 have been characterized by IR, NMR, elemental analysis and mass spectrometry, and 3-9 have also been determined by single-crystal X-ray diffraction analysis.
CpCo(S(2)C(2)B(10)H(10))(1)（Cp = 五甲基环戊二烯基）与 N-1-萘基炔丙酰胺反应，得到两个 18e 配合物 (2) 和 (3)。2 是一个含有四元金属环的 1:1 加合物。在 3 中，炔烃以头对头的方式两次插入一个 Co-S 键。1 与 1-(2-呋喃基)-2-丙炔-1-酮和 1-二茂铁基-2-丙炔-1-酮的反应分别得到两种类型的炔烃两倍插入产物 (4)/(5) 和 (6)/(7)。1 与苯乙炔的反应生成与 3、4 和 6 相同结构类型的唯一配合物 (8)，而 1 与二甲基乙炔二羧酸酯的反应仅得到唯一的 1:1 加合物 (9)。配合物 2-9 通过红外、核磁、元素分析和质谱进行了表征，3-9 也通过单晶 X 射线衍射分析进行了确定。
