A one-dimensional supramolecular head-to-tail N+-H center dot center dot center dot N-type hydrogen-bonded chain of the complex [Fe-II(L)(2)H](ClO4)(3)center dot MeOH [L = 4'-(4'''- pyridyl)-1,2':6'1''-bis(pyrazolyl)pyridine] exhibits a reversible, thermally driven spin transition at 286 K with a hysteresis loop of ca. 2 K.
Bulky anion effect on the architecture of chiral dysprosium single‐molecule magnets
chiral tris(β-diketonato)lanthanide complexes in coordinationchemistry is huge due to its Lewis acid character, optical activity, and the control of the final compound architecture. The reaction of equimolar quantities of [Dy((−)/(+)hfc)3(H2O)] (hfc− = 3-(heptafluoropropylhydroxymethylene)-(+/−)-camphorate) and L led to the formation of a pair of enantiomers for dinuclear complexes [Dy((−)/(+)hfc)3(L)]2⋅C7H16
由于手性三(β-二酮基)镧系配合物的路易斯酸特性、光学活性和最终化合物结构的控制,配位化学中对手性三(β-二酮)镧系配合物的兴趣很大。[Dy((−)/(+)hfc) 3 (H 2 O)](hfc − = 3-(七氟丙基羟基亚甲基)-( +/− )-樟脑酸盐)和L的等摩尔反应导致形成双核配合物的一对对映异构体 [Dy((−)/(+)hfc) 3 ( L )] 2 ⋅C 7 H 16 ( [ (−)/(+)1 ]⋅C 7 H 16 ) ( L = 4'-(4'''-吡啶基-N-氧化物)-1,2':6'1''-双-(吡唑基)吡啶])。从之前添加大体积 BArF 阴离子的实验方案开始,观察到手性 [Dy((−)/(+)hfc) 3 ( H 2 O )] 的部分解离导致单维分离阳离子手性聚合物[Dy((−)/(+)hfc) 2 ( L )][BarF]} n ⋅nCH 3 NO 2 ([(−)/(+)2]