Neutral and cationic iron carbonyl complexes substituted with the water-soluble phosphines+ (n = 2,3,6 and 10)

Article abstract of DOI:10.1016/0022-328X(95)05751-A

Two series of iron carbonyl complexes of the types Fe(CO)4L and ⁺ (L=water-soluble phosphines ⁺, n=2,3,6 and 10, henceforth denoted as II-, III-, VI- and X-phophos respectively), containing neutral iron(0) and monocationic iron(II) centres respectively, have been prepared and characterized by mass spectroscopy, IR and multinuclear NMR techniques.In addition to the complexes Fe(CO)4L, disubstituted derivatives of the type trans-Fe(CO)3L2 have also been obtained as byproducts.For the complex trans-(PF6)2, the II-phosphos 31P<1H> resonances, formally and XAA'X' spin system, exhibit virtual coupling, to our knowledge the first such example in a bis-tertiary phosphine complex in which X and X' are 31P nuclei.Keywords: Iron; Phosphine complexes; Neutral iron carbonyl; Cationic iron carbonyl; Water-soluble phosphines