Main Group Parallels with Binary Carbonyl Complexes

MAIN GROUP PARALLELS WITH BINARY CARBONYL COMPLEXES 

Much chemistry of main group and metal carbonyl species can be rationalized from the way in which these species can achieve closed shell (octet or 18-electron) configurations. These methods of achieving more stable configurations will be illustrated. j for the following electronically equivalent species  

Electrons Short of Filled Shell Examples of Electronically Equivalent Species  

Similarly, 6-electron main group species show chemical similarities with 16-electron organometallic species. As for the halogens and 17-electron organometallic complexes, many of these similarities can be accounted for on the basis of ways in which the species can acquire or share electrons to achieve filled shell configurations. Some similarities between sulfur and the electronically equivalent Fe(CO)4 are listed in Table 15-2. 

Ion of 1 — charge Neutral dimeric species Hydrohalic acid Formation of interhalogen compounds 

1 Main Group Parallels with Binary Carbonyl Complexes 

Halogen atoms, one electron short of a valence shell octet, exhibit chemical similarities with 17-electron organometallic species some of the most striking are the parallels between 

Hydrohalic acid HCl (strong acid in aqueous solution) HCo(CO)4 (strong acid in aqueous solution)  

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