Using picosecond Time Domain Reflectometry (TDR), dielectric relaxation studies have been carried out on binary mixtures of methyl methacrylate with 1-propanol, 1-butanol, 1-heptanol and 1-octanol for various concentrations over the frequency range from 10 MHz to 10 GHz at 293 K. The Kirkwood correlation factor and excess inverse relaxation times were determined and discussed to yield information on the molecular structure and dynamics of the mixture. The static permittivity and relaxation time decrease with an increase in the percentage of methyl methacrylate.
FTIR Spectroscopy / Alcohols / Hydrogen BondingThe hydrogen bonding between methyl methacrylate and primary, secondary and tertiary alcohols has been studied by using FTIR spectroscopic method. The most likely association complex between alcohol and methyl methacrylate is 1 : 1 stoichiometric complex through the hydroxyl group of alcohol and the carbonyl group of methyl methacrylate. The formation constant of the 1 : 1 complexes has been calculated using Nash method. It appears that the primary alcohols have larger formation constant than the secondary and tertiary alcohols. The results show that the proton donating power of the alcohols decreases in the order primary > secondary > tertiary and the association constant increases with the increase in carbon chain of the alkyl group of alcohols.
FTIR Spectroscopy / Hydrogen Bonding / 1 : 1 Complex / Solvent EffectThe hydrogen bonding between ethyl methacrylate dissolved in 1-butanol in inert solvents viz., n-heptane, carbon tetrachloride and benzene has been studied using FTIR spectroscopy. Utilizing Nash method the formation constant of the 1 : 1 complexes has been calculated. The formation constant and free energy change values vary with the solvents are observed in the present study confirms the solvent environment may affect the strength of intermolecular hydrogen bond formation between free hydroxyl group of 1-butanol and the carbonyl group of ethyl methacrylate.
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