العوامل المؤثرة على حامضية اوكزيمات و قواعد شيف المشتقة من مركب بنزل و بعض المركبات الأخرى

الملخص EN

The research is concerned with the studying of four experimental factors that affecting the acidity of 18 imines acids compounds derived from benzil and furfuryl aldehyde.

These factors are syn and anti isomers in oximes, percentage of alcohol in alcohol-water solvent, ionic strength of solution and temperature during measurements.

The study confirms that each of the experimental factors mentioned above are affecting the acidity which summarized as follows : 1.

The pKa of acidic compounds are affected in either positive or negative directions by changing temperature.

The thermodynamics of ionization reactions are calculated that prove to be non spontaneous from the positive sign of ΔG.

2.

α-BMO isomer has greater acidity if compared with its analogue β-BMO.

The reverse of this result is true on comparing geometrical isomers of oximes derived from FAO.

3.

The increase in ionic strength of the medium is accompanied by an increase in acidity of acid, reaching to a maximum value, and than decreased.

4.

The increases of alcohol in alcohol-water solvent mixture during pKa determination is accompanied by a decrease of acidity.