A Thermochemical Parameters and Theoretical Study of the Chlorinated Compounds of Thiophene

Table 1

Values of standard entropy () and heat capacity at constant pressure () at selected temperatures for chlorinated thiophene isomers. in cal/(mol K) and (T) in cal/(mol K).

		298.15K	300K	500K	800K	1000K	1500K
Thiophene	70.566	17.895	18.006	27.771	35.679	38.827	43.453
2-Chlorothiophene	77.534	21.624	21.730	26.875	37.967	40.709	44.612
3-Chlorothiophene	78.109	21.685	21.792	30.929	38.022	40.738	44.614
2,3-Dichlorothiophene	85.559	25.327	25.429	33.915	40.280	42.608	45.776
2,4-Dichlorothiophene	85.716	25.431	25.533	33.995	40.320	42.630	45.781
2,5-Dichlorothiophene	85.860	25.354	25.455	33.881	40.257	42.595	45.775
3,4-Dichlorothiophene	85.377	25.379	25.483	34.024	40.344	42.645	45.784
2,3,4-Trichlorothiophene	92.799	29.059	29.158	37..041	42.625	44.532	46.956
2,3,5-Trichlorothiophene	93.197	29.067	29.163	36.968	42.573	44.497	46.942
2,3,4,5-Tetrachlorothiophene	100.252	32.697	32.789	40..005	44.875	46.395	48.114