Phenolic hydrogen bonding, assembly

The favourable intra-molecular hydrogen-bonding between the oxime proton and the phenol oxygen atom will reduce or overcome liganddigand repulsion enthalpy terms normally involved in the formation of bis-chelate complexes. The integrity of this head-to-tail macrocyclic assembly is preserved in c/.v-octahcdral complexes which are formed in the presence of a, co-diamines. [66, 67]... 

Dianin s compound 8 is a famous example of a lattice inclusion host from the early days of inclusion chemistry [26,27], It is usually prepared as the race-mate and forms inclusion compounds with many guests in space group R3. Six molecules of 8 assemble by means of their phenolic groups into a near-planar hydrogen-bonded (-0-H)6 cycle, with alternate molecules being orientated up... 

As stated, hydrogen bonds have been used to construct the majority of finite molecular assemblies. Thus, most synthons used to form finite assemblies in the solid state have been based on hydrogen bonds. Many such synthons have also been used to form networks.2 Examples include single-point hydrogen bonds based on phenols and imidazoles, as well as multi-point hydrogen bonds based on carboxylic acid dimers, pyridone dimers, urea dimers, cyanuric acid-melamine complexes, and pyridine-carboxylic acid complexes.2... 

B. Anion Recognition by Metallodendrimers Assembled by Hydrogen Bonding Between a Redox-Active Dendronic Phenol and Dendritic Primary Amines... 

Quanmm chemical calculations were performed to gauge the effect of cation-jt and hydrogen bonding interactions on each other, with M-phenol-acceptor (M = Li+ and Mg + acceptor (A) = H2O, HCOOH, HCN, CH3OH, HCONH2 and NH3) taken as model ternary systems. (Fig. 18.6a) Direct assembly of the ternary... 

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