Synthesis, Structure, NMR Spectroscopy, and Electrochemistry of the Sterically Congested Triarylarsine Dipp3As: EPR Characterization of its Radical Cation
作者:Mona Taghavikish、Brock L. Price、Tracey L. Roemmele、René T. Boeré
DOI:10.1071/ch13244
日期:——
The synthesis, NMR spectroscopy, single-crystal X-ray structure, and solution electrochemistry of the new compound [2,6-CH(CH3)}2C6H3]3 As, abbreviated as Dipp3As, is reported. The molecule, prepared by reaction of AsCl3 with a pre-formed aryl copper reagent, Dipp4Cu4, crystallizes in the hexagonal space group R3 as a racemic twin. The sum of angles around As, ∑∠CAsC}, is 329.13(3)° in the X-ray
报道了新化合物[2,6- CH(CH 3)} 2 C 6 H 3 ] 3 As的合成,核磁共振波谱,单晶X射线结构和溶液电化学,缩写为Dipp 3 As。 。通过AsCl 3与预先形成的芳基铜试剂Dipp 4 Cu 4反应制备的分子在六方空间群R 3中结晶为外消旋孪晶。根据R-B3LYP / 6-31G(d,p)混合密度泛函理论计算,X射线结构中As的角度之和∑∠ CAsC}为329.13(3)°,R.B3LYP / 6-31G(d,p)为329.17°。两个ipso都使芳香环失真碳,尤其是As原子明显偏离平面0.503(3)Å。环境温度NMR光谱适合C 3对称性,这意味着在NMR时标上反演很慢。在CH 2 Cl 2中的0.4 M [ n Bu 4 N] [PF 6 ]上的玻璃碳电极上的循环伏安法,在0.05–0.8 V s –1的扫描速率和22±2°C的温度下产生了一个准可逆过程与Ë