molecular orbitals. The ferromagnetic exchange interaction in 1 is so strong that only the high-spin quartet state (S(T) = (3)/(2)) is thermally populated at temperatures up to 300 K. The temperature-dependent magnetic susceptibility data for 2 reveals that an excited state spin doublet (S(T) = (1)/(2)) is populated at higher temperatures, indicating that the phenylene spacer modulates the magnitude of
                                    我们描述了两种新
金属配合物 NN-SQ-Co(III)(py)(2)Cat-NN (1) 和 NN-Ph-SQ-Co(III)( py)(2)Cat-Ph-NN (2)(NN = 
硝酰基硝基氧自由基,Ph = 1,4-亚苯基,SQ = S = (1)/(2) 半醌自由基,Cat = S = 0 
邻苯二酚,py = 
吡啶)。1 和 2 的近红外电子吸收光谱揭示了一个低能光带,该带被指定为 Psi(u) --> Psi(g) 跃迁,涉及离域二
氧戊环 (SQ/Cat) 价态的键合和反键合线性组合前沿分子轨道。1 中的
铁磁交换相互作用非常强,以至于只有高自旋四重态 (S(T) = (3)/(2)) 在高达 300 K 的温度下热填充。2 的温度相关磁化率数据显示激发态自旋双峰 (S(T) = (1)/(2)) 在较高温度下填充,表明亚苯基间隔物调节磁交换的幅度。2 的二
氧戊环二元组内的价离域导致两个局部