Carbon monoxide metal complexes

As discussed above, reduction of metal-metal bonded complexes is common, particularly for carbon monoxide-substituted complexes. The electrochemical potential of these reactions has been widely studied (see Electrochemistry Applications in Inorganic Chemistry). In addition, Meyer has shown that the metal-metal bond strength can be estimated via electrochemical techniques. The results applied to Mn2(CO)io are in agreement with values obtained by other methods and could provide a means of generating a wide range of metal-metal bond strengths. The legs of the electrochemical cycle are shown in equation (99). 

Insertions of Carbon Monoxide in Complexes of Group IB Metals. 

Insertions of Carbon Monoxide In Complexes of Group VIII Metals. 

Iron, Ruthenium, and Osmium.—Cyclo-octafluorotetramethylenetetra-carbonyliron (100), formed in the thermal reaction of tetrafluoroethylene with iron carbonyls, was one of the earliest reported fluoro-organo-derivatives of a transition metal. It may be more efficiently synthesized in a photochemical reaction. Ligands displace carbon monoxide from complex (100) to form complexes of the types (101) [L = PPhj, AsPhj,... 

With an atomic number of 28 nickel has the electron conflguration [Ar]4s 3c (ten valence electrons) The 18 electron rule is satisfied by adding to these ten the eight elec Irons from four carbon monoxide ligands A useful point to remember about the 18 electron rule when we discuss some reactions of transition metal complexes is that if the number is less than 18 the metal is considered coordinatively unsaturated and can accept additional ligands... 

Oxo Synthesis. Ad of the synthesis gas reactions discussed to this point are heterogeneous catalytic reactions. The oxo process (qv) is an example of an industriady important class of reactions cataly2ed by homogeneous metal complexes. In the oxo reaction, carbon monoxide and hydrogen add to an olefin to produce an aldehyde with one more carbon atom than the original olefin, eg, for propjiene ... 

Use of alcohol as a solvent for carbonylation with reduced Pd catalysts gives vinyl esters. A variety of acrylamides can be made through oxidative addition of carbon monoxide [630-08-0] CO, and various amines to vinyl chloride in the presence of phosphine complexes of Pd or other precious metals as catalyst (14). 

---