follows a complex process that gives multiple products, including the monomeric trivalent species κP,κC,κN-2,6-(i-Pr2PO)(C6H3)(CH═NBn)}NiBr2 (2). These studies also indicate that oxidation of 1 with 1 equiv of NBS gives an unstable, paramagnetic intermediate that decomposes to a number of divalent species, including succinimide and the monomeric divalent complexes κP,κC,κN-2,6-(i-Pr2PO)(C6H3)(CH═NBn)}NiBr
二聚体钳形络合物的电解和
化学氧化[κ P,κ Ç,κ Ñ,μ ñ - (2,6-(我-Pr 2 POC 6 ħ 3 CH 2 NBN)的Ni] 2(1 ; BN = CH 2 Ph)已通过各种分析技术进行了研究。循环伏安法测量表明1经历了准可逆的单电子
镍基氧化还原过程(ΔE 0 1/2 = -0.07 V vs Cp 2 Fe / [Cp 2
铁] +),以及对电解氧化产物[ 1 ] +•进行的光谱电
化学测量显示,在10000-15000 cm -1范围内有多个低能电子跃迁。使用密度泛函理论(B3LYP)进行的计算研究证实了实验获得的1的结构,提供了电子结构描述,并帮助解释了实验获得的1和[ 1 ] + ·的吸收光谱。这些计算表明自由基阳离子[ 1 ] + ·是一种二聚体,混合价物质(III类),其中大多数自旋密度在两个
镍中心(Ni +2.5 2 N 2)上离域,但在两个氮原子(Ni 2+ 2