Magnetic Interaction of Pyridyl-Substituted Thioaminyl Stable Free Radicals<sup>1</sup>
作者:Yozo Miura、Yuichi Oyama、Yoshio Teki
DOI:10.1021/jo0205659
日期:2003.2.1
as radical crystals. Their ESR spectra were measured, and the NS and pyridyl nitrogen and anilino meta and pyridyl ortho and para proton hyperfine coupling constants were determined. The spin-density calculations based on the density functional theory were performed by the UBecke 3LYP hybrid method using the STO 6-31G basis set. X-ray crystallographic analyses were performed for three radicals, and
N-(2-吡啶硫基)-2,6-二芳基-4-R-苯胺基(R = Ph,4-ClC(6)H(4),MeCO,CN,EtOCO)和N-(4-吡啶硫基)-制备2,6-二芳基-4-R-苯胺基(R = Ph,4-ClC(6)H(4),EtOCO)并分离为自由基晶体。测量了它们的ESR谱,并测定了NS和吡啶基氮以及苯胺基间和吡啶基邻和对质子的超精细耦合常数。基于密度泛函理论的自旋密度计算是通过UBecke 3LYP混合方法,使用STO 6-31G基集进行的。对三个自由基进行了X射线晶体学分析,并详细讨论了它们的结构。用SQUID磁力计对9种离析的自由基进行磁化率测量。一个基团显示出铁磁耦合(2J / k(B)= 44 K),其他显示反铁磁行为。根据晶体结构解释了观察到的磁相互作用。