The Ligand Close-Packing LCP Model

Molecule No. Bond Length (pm) Bond Angle (°) C---C (pm)  

The ligand radii in Table 5.6 for ligands bonded to carbon agree well with Bartell s values, as would be expected, but the other radii are different. This is the reason for the lack of success of the 1,3 radii when applied to a range of molecules. Glidewell had assumed that the 1,3 radius was independent of the central atom, so the radii he obtained were not a consistent set, since the radii for different ligands were obtained for different central atoms. 

---

Before discussing the AIM theory, we describe in Chapters 4 and 5 two simple models, the valence shell electron pair (VSEPR) model and the ligand close-packing (LCP) model of molecular geometry. These models are based on a simple qualitative picture of the electron distribution in a molecule, particularly as it influenced by the Pauli principle. 

LIGAND-LIGAND INTERACTIONS AND THE LIGAND CLOSE-PACKING (LCP) MODEL... 

Ligand-Ligand Interactions and the Ligand Close-Packing (LCP) Model... 

---