Electronic distribution Back donation 4 Binding energy 4 Chemical bonds 4 Complex pattern 4 Electronic density 4 Ligands 4 Population analysis 4 Topology 4 Transition metals 4 back-donation 4 complex patterns of bonding 4 electronic density 4 electronic distribution 4 topology 4 2D layer 2 Adsorption 2 Analytical model 2 Aromatic group 2 Aromatic polymers 2 Atomic adsorptions 2 Atomic interactions 2 Bonding interactions 2 Carbon 2 Carbon nanotubes 2 Carbon-nanotube composites 2 Carbonylation 2 Chemical analysis 2 Chemical bondings 2 Chemisorption 2