Polyfunctional phosphine ligands II. Iridium(I) complexes of the 7-diphenylphosphino-2,4-dimethyl-1,8-naphthyridine (dpnapy) ligand. X-ray crystal structure of [{Ir(cod)Cl}2(μ-dpnapy)]
作者:Sandra Lo Schiavo、Maria Grassi、Giovanni De Munno、Francesco Nicolò、Giuseppe Tresoldi
DOI:10.1016/0020-1693(93)03730-x
日期:1994.2
PN(8) chelated. The binuclear complex [Ir(cod)Cl} 2 (μ-dpnapy)] ( 5 ), containing a bridging bidentate dpnapy, is obtained from the 1:1 [Ir(cod)Cl}2]:dpnapy reaction. The bridging function of dpnapy is realized through the phosphorus and the terminal nitrogen binding sites in agreement with the NMR data and as confirmed by an X-ray analysis. Complex 5 crystallizes into the monoclinic space group P 2
摘要研究了多官能膦配体7-二苯基膦基-2,4-二甲基-1,8-萘啶(dpnapy)与铱(I)配合物的配位化学。Dpnapy与顺式-[Ir(CO)2(对甲苯胺)Cl]的摩尔比为1:2和1:1,得到含P-单齿配体的反式-[Ir(CO)(dpnapy)2 Cl]( 1)和顺式-[Ir(CO)2(dpnapy)Cl](2)。络合物2在溶液中不稳定;IR和31 P NMR光谱数据显示,在室温下它在短时间内转变为1。dpnapy与[Ir(cod)Cl} 2](cod = cycloocta-1,5-diene)的反应也取决于所使用的金属与配体的比率。含有P配位的dpnapy的单核络合物[Ir(cod)(dpnapy)Cl](3)是从1:2的二聚体:配体反应获得的。3的1 H和13 C NMR光谱与温度有关。他们表明,通量行为涉及鳕鱼配体,并通过不稳定的五坐标中间体的形成来解释,该中间体显示了非等价的鳕鱼质子和碳的快速交换。用AgClO