4-substituted, dipicolinatodioxovanadium(V) complexes and their hydroxylamido derivatives were synthesized to characterize the solid state and solution properties of five- and seven-coordinate vanadium(V) complexes. The X-ray crystal structures of Na[VO2dipic-NH2].2H2O (2) and K[VO2dipic-NO2] (3) show the vanadium adopting a distorted, trigonal-bipyramidal coordination environment similar to the parent
合成了许多4-取代的二
吡啶啉二氧杂
钒(V)配合物及其羟基酰胺衍
生物,以表征五坐标和七坐标
钒(V)配合物的固态和溶液性质。Na [VO2dipic-NH2] .2 (2)和K [VO2dipic-NO2](3)的X射线晶体结构表明,
钒采用类似于母体配位化合物[VO2dipic]的扭曲的三角-双锥体配位环境。 -(1),先前报道为Cs +盐。在1H(约0.7-1.4 ppm)和51V(约1-11 ppm)NMR光谱中观察到的络合物
化学位移差异与取代基的供电子或吸电子性质一致, 分别。一系列
羟胺配体( H,MeHNOH,Me2NOH,和Et2NOH)配合物1-3导致形成七配位
钒(V)配合物。发现[VO(dipic)(Me2NO)(
H2O)]。0.5 (1c)的X射线晶体结构类似于先前表征的配合物[VO(dipic)(
H2NO)( )](1a)和[VO(dipic)(OO-tBu