Synthesis, Reactivity, and Coordination of Semihomologous dppf Congeners Bearing Primary Phosphine and Primary Phosphine Oxide Groups
作者:Filip Horký、Ivana Císařová、Petr Štěpnička
DOI:10.1021/acs.organomet.0c00767
日期:2021.2.8
bis-phosphine combining primary and tertiary phosphine moieties in its structure, Ph2PfcCH2PH2 (2), and a structurally unique, stable phosphine-primary phosphine oxide Ph2PfcCH2P(O)H2 (7; fc = ferrocene-1,1′-diyl). Compounds 2 and 7, together with 1,1′-bis(diphenylphosphino)ferrocene (dppf), the bis-tertiary phosphine Ph2PfcCH2PPh2, and the adduct Ph2P(BH3)fcCH2PH2 (6), were studied as ligands in Ru(II)
该文献报道了通过插入的亚甲基间隔基来对称化的两个膦基二茂铁配体的合成,即在其结构中结合了伯和叔膦基团的双膦(Ph 2 PfcCH 2 PH 2(2))和结构独特的稳定膦-伯氧化膦Ph 2 PfcCH 2 P(O)H 2(7; fc =二茂铁-1,1'-二基)。化合物2和7,以及1,1'-双(二苯基膦基)二茂铁(dppf),双叔膦Ph 2 PfcCH 2 PPh 2和加合物Ph 2P(BH 3)FCCH 2 PH 2(6),进行了研究作为配体的Ru中(II)络合物轴承辅助η 6个-arene配体和游离配位体和分离的复合物结构认证,采用光谱学方法和X-射线晶体学,并通过循环伏安法进一步研究。结果表明,在不对称配体中不同的供体部分区分了原本相同的配位金属中心,并且在膦氧化物基团必须互变异构为烯丙基之前,膦-膦氧化物配体7中的膦部分优选与Ru(II)配位。在配位之前先形成羟基膦。