Abrupt spin transition in a modified-terpyridine cobalt(<scp>ii</scp>) complex with a highly-distorted [CoN<sub>6</sub>] core
作者:Manabu Nakaya、Ryo Ohtani、Jong Won Shin、Masaaki Nakamura、Leonard F. Lindoy、Shinya Hayami
DOI:10.1039/c8dt02367k
日期:——
The cobalt(II) complex incorporating π-conjugated substituent, [Co(Naph-C2-terpy)2](BF4)2 (1; Naph-C2-terpy = 4′-(2-naphthoxy(ethoxy))-2,2′:6′,2′′-terpyridine), exhibits an abrupt spin transition (ST) behavior (cooperative factor C = 0.91) while its solvated product, 1·2MeOH, shows gradual spin crossover (SCO) behavior (C = 0.49). Single crystal X-ray structural analyses demonstrated that the octahedral
包含π共轭取代基[Co(Naph-C2-terpy)2 ](BF 4)2(1 ; Naph-C2-terpy = 4'-(2-萘氧基(乙氧基))-2的钴(II)配合物,2′:6′,2′′-吡啶),表现出突然的自旋跃迁(ST)行为(合作因子C = 0.91),而其溶剂化产物1 ·2MeOH则显示出逐渐的自旋交叉(SCO)行为(C = 0.49)。单晶X射线结构分析表明,八面体配位核[CoN 6 ]在1中显示出比溶剂化的1 ·2MeOH或另外两种衍生物[Co(R-terpy)]在高旋态和低旋态下都更大的畸变2 ](BF 4) 2(R = 2-萘基( 2),9-蒽基( 3))。将各自的畸变参数( Σ)与先前报道的SCO钴( II)化合物的畸变参数进行了比较。高扭曲的[CoN 6 ]核为1(HS状态下的Σ = 126,LS状态下的101.6)通过强烈的分子间相互作用而稳定下来,并观察到了突然的ST行为。