Co
<sup>III</sup>
Complexes with Square‐Planar N
<sub>2</sub>
S
<sub>2</sub>
‐ and N
<sub>2</sub>
(SO
<sub>2</sub>
)
<sub>2</sub>
‐Type Ligands as An Active Site Structural Model for Nitrile Hydratase – Biological Implications of an Amidate Coordination
作者:Takuma Yano、Hidekazu Arii、Syuhei Yamaguchi、Yasuhiro Funahashi、Koichiro Jitsukawa、Tomohiro Ozawa、Hideki Masuda
DOI:10.1002/ejic.200600507
日期:2006.9
In an attempt to understand the unique active site structure of nitrile hydratase, four Co III complexes with square-planar N 2 S 2 - or N 2 (SO 2 ) 2 -type donor sets, Na[Co III (L:N 2 S 2 )] (1-Na), PPh 4 [Co III (L:N 2 S 2 )] (1-PPh 4 ), PPh4[Co III (L:N 2 S 2 )(tBuNC) 2 ] (2), and PPh 4 [Co III L:N 2 (SO 2 ) 2 }(tBuNC) 2 ] (3) were synthesized and characterized on the basis of electronic absorption
为了理解腈水合酶独特的活性位点结构,四种 Co III 复合物与方形平面 N 2 S 2 - 或 N 2 (SO 2 ) 2 型供体组 Na[Co III (L:N 2 S) 2 )] (1-Na), PPh 4 [Co III (L:N 2 S 2 )] (1-PPh 4 ), PPh4[Co III (L:N 2 S 2 )(tBuNC) 2 ] (2) , 和 PPh 4 [Co III L:N 2 (SO 2 ) 2 }(tBuNC) 2 ] (3) 在电子吸收光谱、红外光谱、循环伏安法和 X 射线结构分析的基础上合成和表征. 配合物 1-Na 和 1-PPh 4 的晶体结构均显示出具有 N 2 S 2 供体原子的方形平面结构,而配合物 2 在配合物的轴向位点处显示出与两个叔丁基异氰化物 (tBuNC) 分子配位的八面体结构。 1-PPh 4 。复合体 3, 通过用合适的氧化剂处理