‘Oligomeric compounds’ with three, four or six mesogenic groups in the chain were synthesized by the Wittig reaction from different bis Wittig salts and various heteroaromatic aldehydes. The mesogenic groups are connected via hexamethylene moieties. All derivatives containing at each terminal position of the chain E-1,2-di-(2-thienyl)ethylene units and one, two or four E,E-2,5-bis(2-thienylvinyl)thiophene units in the chain show nematic phases while heating and/or cooling the samples (2a, 4 and 5). Moreover, the oligomeric compound having the chain from 2a and one terminal formyl group (5) also has a nematic phase. The derivative with four E-2-(2-thienylvinyl)thiophene units in the chain (3a) melts without forming a mesophase. Also two ‘oligomeric compounds’ with benzene and thiophene systems in the mesogenic groups were synthesized. The compounds all-E-1,4-bis[5-{6-[5-(2-thienylvinyl)2-thienyl]hexamethylene}-2-thienylvinyl]b (2b) with three mesogenic groups and allE-1,6-bis{4-[5-{6-[5-(2-thienylvinyl)-2-thienyl]hexamethylene}-2-thienylviny (3b) with four mesogenic groups in the chain do not show liquid crystalline phases.