Influence of Linking Group Orientation on Mesomorphism of Two Aromatic Ring Mesogens

Table 2

Transition temperature and associated enthalpy changes of alkyl 4-{[(4-chlorophenyl)imino]methyl}benzoates upon heating and cooling cycles.

Compound	Transition temperature, °C (Δ𝐻, kJ mol^−1); Heating; *Cooling
2ClCBA	Cr 117.3 (25.5) I; Cr 82.6 (25.9) I
3ClCBA	Cr 62.5 (22.0) I; Cr 37.6 (21.8) I
4ClCBA	Cr 57.7 (18.7) I; Cr 31.8 (17.2) I
5ClCBA	Cr 55.8 (23.6) I; Cr 20.1 (22.3) I
6ClCBA	Cr 41.4 (22.8) I; Cr 18.2 (23.2) I
7ClCBA	Cr 46.6 (24.4) I; Cr 21.3 (25.3) I
8ClCBA	Cr 44.5 (32.5) I; Cr 14.8 (31.8) I
9ClCBA	Cr 53.3 (41.3) I; Cr 25.6 (34.1) I
10ClCBA	Cr 53.1 (42.9) I; Cr 39.7 (45.5) I
11ClCBA	Cr 63.1 (45.8) I; Cr 42.1 (49.0) I
12ClCBA	Cr 62.5 (48.7) I; Cr 42.0 (47.9) I
13ClCBA	Cr 66.6 (51.9) I; Cr 44.0 (55.3) I
14ClCBA	Cr 70.3 (49.1) I; Cr 47.7 (51.3) I
15ClCBA	Cr 71.4 (45.3) I; Cr 50.1 (50.3) I
16ClCBA	Cr 75.6 (61.8) I; Cr 53.6 (72.0) I

Cr: crystal; I: isotropic. *Cooling data is presented in italics font.