New Homologues Series of Heterocyclic Schiff Base Ester: Synthesis and Characterization

Table 1

Phase transition temperature and transition enthalpy changes for compounds 3a–g.

Compound	Phase transition, °C (corresponding enthalpy changes, kJmol^−1)
3a	Cr1 85.08 (5.88) Cr2 95.43 (24.65) N 156.81 (0.55) I
	I 156.69 (0.47) N 75.86 (20.72) Cr
3b	Cr 104.75 (38.67) N 146.10 (1.06) I
	I 143.30 (1.02) N 73.49 (33.61) Cr
3c	Cr1 84.45 (0.95) Cr2 105.51 (28.03) N 141.04 (1.09) I
	I 136.30 (0.71) N 81.14 (29.07) Cr
3d	Cr1 89.51 (0.81) Cr2 108.08 (31.92) N 142.25 (0.91) I
	I 141.15 (1.01) N 84.53 (34.72) Cr
3e	Cr1 89.53 (0.66) Cr2 108.96 (38.21) N 141.93 (1.27) I
	I 139.27 (1.37) N 82.90 (40.61) Cr
3f	Cr1 100.34 (3.88) Cr2 111.01 (33.26) N 135.67 (2.10) I
	I 134.15 (2.37) N 105.48 (0.32) SmC 89.75 (47.45) Cr
3g	Cr1 91.78 (2.67) Cr2 105.76 (32.30) SmC 109.76 (0.02) N 132.92 (2.01) I
	I 131.05 (1.60) N 107.43 (0.14) SmC 90.82 (42.39) Cr