Interconversion between the Enantiomers of Chiral Five-Coordinate Me<sub>3</sub>Pt(IV) Complexes
作者:Runyu Tan、Datong Song
DOI:10.1021/ic200889y
日期:2011.11.7
The dinuclear Me2Pt(II) complexes of 3,4-bis(quinolin-8-yl)thiophene (1a), 3,4-bis(6 trifluoromethoxyquinolin-8-yl)thiophene (1b), and 3,4-bis(2-methylquinolin-8-yl)thiophene (1c) react with MeOTf (OTf = trifluoromethanesulfonate) to afford the corresponding chiral mononuclear five-coordinate Me3Pt(IV) complexes [PtMe3(1a)]OTf (3a), [PtMe3(1b)]OTf (3b), and [PtMe3(1c)]OTf (3c), respectively. [PtMe3(1c)]BArF4
3,4-双(喹啉-8-基)噻吩(1a),3,4-双(6三氟甲氧基喹啉-8-基)噻吩(1b)和3,4-的双核Me 2 Pt(II)配合物双(2-甲基喹啉-8-基)噻吩(1c)与MeOTf(OTf =三氟甲磺酸盐)反应,得到相应的手性单核五配位Me 3 Pt(IV)配合物[PtMe 3(1a)] OTf(3a), [PtMe 3(1b)] OTf(3b)和[PtMe 3(1c)] OTf(3c)。[PtMe 3(1c)] BAr F还合成了4(3d)(其中BAr F 4 = [B C 6 H 3 -3,5-(CF 3)2 } 4 ])进行结构研究。虽然3a在溶液中看起来是对称的,而在固态中是不对称的,但是3c和3d在溶液和固态中都是不对称的。手性来自配位体排斥,而不是任何不对称的配体。可变温度NMR和计算研究表明,配体扭曲异构化途径用于对映异构体的相互转化,而不是三个CH 3的旋转交换。 金属中心上的配体。