Synthesis, structures and rac/meso isomerization behaviour of bisplanar chiral bis(phosphino-η5-indenyl)iron(II) complexes
作者:Owen J. Curnow、Glen M. Fern、Michelle L. Hamilton、Elizabeth M. Jenkins
DOI:10.1016/j.jorganchem.2004.03.014
日期:2004.6
these ferrocene complexes are bisplanar chiral systems that can potentially form rac and meso isomers. In all cases both isomers were observed but for 2b and 2h only one could be isolated. The rac isomers of complexes 2a, 2b, 2d, and 2e, as well as the meso isomer of 2e, were studied by X-ray crystallography. Only complexes 2a and 2i were observed to undergo rac/meso isomerization processes at ambient
膦基茚1-(二苯基膦基)-3-甲基茚(1b),3-(二苯基膦基)-2-甲基茚(1c),1-(二苯基膦基)-2,3-二甲基茚(1d),4,7-二甲基的合成通过用适当的氯膦处理适当的茚化物来进行-3-(二苯基膦基)茚(1e),1-(二苯基膦基)-3,4,7-三甲基茚(1f)和3-(二异丙基膦基)茚(1i)。 。通过用三甲基氯硅烷处理3-(二苯基膦基)茚基(1a)的茚化物来制备甲硅烷基膦基茚3-(二苯基膦基)-1-(三甲基甲硅烷基)茚基(1h)。除了1a以外,这些还表示然后,在用BuLi进行质子化后,用,,通过以2:1的比例的氯化亚铁处理,制备相应的茚基二茂铁2a - 2e,2h和2i。这些化合物通过1 H,13 C和31 P NMR光谱以及质谱进行表征,除了高度敏感的二异丙基膦2i只能通过31 P NMR光谱表征。所有这些二茂铁配合物都是双平面手性体系,可潜在形成外消旋和内消旋异构体。在所有情