Spin-States of Diastereomeric Iron(II) Complexes of 2,6-Bis(thiazolin-2-yl)pyridine (ThioPyBox) Ligands and a Comparison with the Corresponding PyBox Derivatives
作者:Namrah Shahid、Kay E. Burrows、Mark J. Howard、Christopher M. Pask、Oscar Cespedes、Patrick C. McGowan、Malcolm A. Halcrow
DOI:10.1021/acs.inorgchem.1c01988
日期:2021.9.20
heterochiral congeners are essentially low-spin within the liquid range of the solvent. These data imply that the diastereomers of [Fe(L1Ph)2]2+ and [Fe(L1iPr)2]2+ show a greater difference in their spin-state behaviors than was previous found for [Fe(L2Ph)2]2+. Gas-phase DFT calculations (B86PW91/def2-SVP) of the [Fe(L1R)2]2+ and [Fe(L2R)2]2+ complexes reproduce most of the observed trends, but they
本报告研究了手性 PyBox 三齿配体的噻唑啉基类似物的均质铁 (II) 配合物:2,6-双(4-苯基-4,5-二氢噻唑-2-基) 吡啶 ( L 1 Ph), 2,6-双(4-异丙丙基-4,5-二氢噻唑-2-基)吡啶(大号1我PR),和2,6-双(4-叔丁基- 4,5-二氢吡啶-2-基)吡啶(大号1吨-Bu)。晶体学数据意味着更大和更灵活的噻唑啉环减少了同手性 [Fe(( R )- L 1 R) 2 ] 2+ 中R 取代基之间的空间冲突或 [Fe(( S )- L 1 R) 2 ] 2+ (R = Ph、i Pr 或t -Bu),与它们的 PyBox ( L 2 R) 类似物相比。相反,较大的杂环 S 原子与杂手性 [Fe(( R )- L 1 Ph)(( S )- L 1 Ph)] 2+ 中的 R 取代基紧密接触,使其比在 [Fe(( R )- L 2 Ph)(( S )- L 2 Ph)]