is held together by two bicapping tripodal phosphonate ligands. Replacement of the chelating 2,2′-bipyridine ligand with 3,5-dimethyl-1H-pyrazole, under the same reaction conditions, afforded a tetranuclear vanadium(V) complex [(VO)4(Ph3CPO3Me)4(μ-O)4}Cl]3,5-Me2PzH2}·3C7H8·H2O·CH3OH [6]. Remarkably 6 possesses a unique bowl-shaped structure encapsulating a chloride anion.
钒(反应III)
三氯化磷与叔-butylphosphonic酸(吨-BuPO 3 ħ 2)在1,10-
菲咯啉/
2,2'-联吡啶的存在下在室温下,得到两种双核双阳离子在
乙腈辅助
配体钒(IV)络合物[(VO)2(phen)2 t -BuPO 2(OH)} 2(OH 2)2 ]·2Cl [ 1 ]和[(VO)2(bipy)2 t -BuPO 2(OH)} 2(OH 2)2 ]·2Cl [ 2 ]。在另一方面,当反应在
甲醇中进行,双核
钒(V)配合物[(VO)2(联
吡啶)2(μ 2 -O)2(吨-BuPO 3)2 ]·2CH 3 OH·分离出0.5CH 2 Cl 2 [ 3 ]。而1和2包含两个六元V 2 P 2个ø 4圈,3包含一个唯一的四元V 2 ö 2戒指。在相同的反应条件下,在
甲醇中用三苯
甲基膦酸(Ph 3 CPO 3 H 2)取代
叔丁基膦酸会导致形成
三羧酸钒(IV)络合物[(VO)3(phen)3(Ph