The Isolobal Analogy of Fragments

The CR fragment is also isolobal with the groups which have three 

For the transition metal complexes possessing the coordination number w, the number of bonding and nonbonding orbitals equals nine and, in the case of the main group compounds, the number of these orbitals is four. This leads to the effective atomic number rule (Sidgwick s rule) and the octet rule, respectively. In and EL  

ML and fragments are isolobal, provided that they contain the 

The inorganic compound P4O6 is analogous to adamantane CioHj and urotropine because CH2 -0- O and P -o- CH -cr N [see relationships (3.13) and 

Coordination number and electron configuration of fragments derived from transition metal complexes 

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