Table 1.

Mesophase transition temperatures, ^oC (enthalpy of transition), mesomorphic range (ΔT, ^oC), and the normalized entropy of transition, ΔS/R, for present series In.

Comp	TCr-SmA	TCr-N	TSmA-N	TN-I	ΔT	ΔSN-I/R
I-6	–	106.3 (39.21)	–	203.1 (1.94)	96.8	0.49
I-8	–	97.8 (38.59)	–	162.1(1.69)	64.3	0.47
I-12	61.3 (35.27)	–	69.8 (3.21)	151.9 (1.75)	90.6	0.50

Cr–N = solid to the nematic mesophase transition.

Cr-SmA = solid to the smectic A mesophase transition.

SmA-N = smectic A to the nematic mesophase transition.

N-I = nematic to the isotropic liquid mesophase transition.

ΔH= enthalpy of transition, kJ/mole; ΔS/R= normalized entropy of transition, unitless (due to the entropy change ΔS is divided by R= gas constant).