(CASSCF) and the N-electron valence perturbation theory (NEVPT2) with the aim of exploring the origin of the large and positive zero-field splitting D of the 6A1 ground state. D was calculated from wave functions of the electronic multiplets spanned by the d5 configuration of Fe(III) along with spin–orbit coupling accounted for by quasi degenerate perturbation theory. Results reproduce trends of D from inelastic
非
氘化
金属
卟啉[Fe(
TPP)X](X = F,Br,I; H 2
TPP =
四苯基卟啉)的零场分裂(ZFS)参数已通过非弹性中子散射(INS)直接确定。对于四方多晶[Fe(
TPP)F],ZFS值为D = 4.49(9)cm –1,D = 8.8(2)cm –1,E = 0.1(2)cm –1,D = 13.4(6) )cm –1,对于单斜多晶[Fe(
TPP)Br]和[Fe(
TPP)I],E = 0.3(6)cm –1。连同我们最近关于ZFS值D = 6.33(8)cm –1的报告对于四方多晶[Fe(
TPP)Cl],这些数据为
金属
卟啉卤化物系列中的ZFS参数提供了罕见的完整测定方法。[Fe(
TPP)X](X = F,Cl,Br,I)的电子结构已通过多参考从头计算方法研究:完整的有源空间自洽场(CASSCF)和N电子价态微扰理论(NEV
PT2)与探索大和正零场分裂的原点的目的d的的6阿1个基态。D是根据Fe(III)的d