Bonded ligands molecular conformation

Molecular conformation of bonded ligands and their degree of freedom is dependent on bonding density. The higher the bonding density, the lower the number of possible conformations and thus the less mobility the bonded chains have. Immobilization of ligands on the surface already restrict their mobility, so if we compare the state of free Cl 8 molecules (n-octadecyl) with immobilized octadecyl, we can expect more rigid (or solid-like) behavior of immobilized chain. Indeed, the study of the viscosity of bonded layers [64]... 

Above we briefly discussed the limitations on possible values of bonding density (Section 3.6.1). Molecular volume of bonded ligands is one of these limitations. If the most stretched conformation of a ligand has length / and its molar volume is v, then the minimum area, co, it occupies on the surface will be ft) = v/l and the maximum bonding density will be d ax = 1/ft). This maximum density is calculated for the flat surface, while on the concave internal surface of the pore the maximum density is lower and could be expressed as... 

Planar coordination compounds with aromatic ligands (Fig. 42), especially those having extended 77 systems, show 77-77 interaction in solid states. In alkene or alkyne 77-bonded Cud) complexes, in-plane coordination ofaC = CorC = C bond to trigonal planar Cu(I) centers often leads to planar molecular conformations (167-171). The infinite 77-77 stacking columns are confirmed in the 2,2 -bipyridine (L55) com-... 

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