The reaction of P(CF3)nX3–n(L; n= 1 or 2, X = F, Cl, Br, or I) with [Co(CO)3(NO)] at room temperature gives [Co(CO)2(NO)L] as the major product in ail cases except P(CF3)I2. The chloro- and fluoro-phosphines can additionally form [Co(CO)(NO)L2] and the fluorophosphines give intermediates of sufficient thermal stability to allow total substitution of CO under more forcing conditions, giving [Co(NO)L3]
在室温下,P(CF 3)n X 3- n(L; n = 1或2,X = F,Cl,Br或I)与[Co(CO)3(NO)]的反应得到[Co除P(CF 3)I 2以外,在所有情况下都以(CO)2(NO)L]作为主要产物。
氯膦和
氟膦还可以形成[Co(CO)(NO)L 2 ] ,
氟膦给出的中间体具有足够的热稳定性,可以在更强的条件下完全取代CO,得到[Co(NO)L 3 ]。 。游离
配体(L')与配位膦(L)在[Co(CO)2中的交换反应(NO)L]启用以下位移系列的结构:P(CF 3)的F 2〜P(CF 3)的F> P(CF 3)
氯2〜P(CF 3)2
氯> PBR(CF 3)2 > P(CF 3)H 2 > P(CF 3)2 I> PBr 2(CF 3)。配位的膦中的P–X键的反应性比相应的游离膦中的低。