Densities have been determined for two 5-n-alkyl-2-(4-isothiocyanatophenyl)
-1,3-dioxanes (6DBT, 10DBT), 4-n-tetradecyl-4'-cyanobiphenyl (14CB), 4-n-oc
tyl-4'-thiocyanatobiphenyl (8BT) and two laterally aryl-branched mesogens 4
-cyanobenzyl 5-(4-n-octyloxybenzoyloxy)-2-undecyloxybenzoate (4CNOUB), 3-cy
anobenzyl 2,5-bis(4-n-octyloxybenzoyloxy)benzoate (3CNBOB). The densities h
ave been measured in the isotropic, nematic (only 3CNBOB) and smectic phase
s with a vibrating tube densimeter. The densities decrease with increasing
alkyl chain length within a homologous series. Furthermore the enthalpy cha
nges accompanying the phase transitions have been determined by DSC.