Iron Carbonyls with Group 15 Ligands

Iron Carbonyl with Group 13 Ligands 6.01.3.1 Boron... 

Iron Carbonyl with Group 14 Ligands 6.01.4.1 Cyanide and Isocyanide Complexes... 

Iron Carbonyls with Group 15 Ligands 6.01.5.1 Nitrogen Donor Ligands... 

The reactions of iron group metal carbonyls with functionally substituted alkenes have been reviewed. It was found that the reactions of the iron carbonyls with alkenes differ from those of the Ru and Os analogs. For Os, in particular, unsaturated ligands raise their hapticity to form unusual structures. ... 

Table 7.12 Calculated BDEs De (Do) (kcal/mol) of iron carbonyl complexes with group-13 diyl ligands ER (E = B - Tl).a...

Substituted cyclopentadienones react with iron carbonyls to form stable, diamagnetic 7r-co triplexes of the type [Fe(CO)3(cyclopentadienone)] (215). The proposed structure is shown in (XX). These complexes undergo reactions typical of metal carbonyls, e.g., displacement of carbon monoxide by tertiary phosphines, but the carbonyl group of the ligand does not show reactions characteristic of a keto-group. These complexes are also formed by interaction of acetylenes with iron carbonyls (see Section VI,C). Interaction of tetracyclone and Fe3(CO)i2 gives unstable complexes which contain the sandwich anion [Fe(tetracyclone)2]2 analogous to the anion (XXV) (215). 

The reaction between acetylenes and ruthenium carbonyls produces a series of n complexes with cyclic ligands which, as in the iron system, have either the metal or a CO group incorporated into the ring. Accordingly, 3-hexyne 536) and hexafluoro-2-butyne 90) react with Ru3(CO)i2 to give the (substituted cyclopentadienone)tricarbonylruthenium complexes with structures presumably comparable to those of the iron complexes (93-95). Although diphenylacetylene will not react directly with Ru3(CO)i2 to produce this type of complex 536), it can be prepared 90) by treating Ru3(CO)i2 with tetracyclone in benzene under reflux. 

The molecular ions of the bimetallic complex [Cr(CO)5]2AsPh (150) lose consecutively 10 CO groups and the Cr atom leading to CrAsPh . Its tiimetallic analogue 151 also loses consecutively all carbonyl ligands and two iron atoms with the formation of... 

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