A series of nonsymmetric liquid crystal trimers, omega-(4-cyanobiphenyl-4'-yloxy)alkyl 4'-co-(4-cyanobiphenyl-4'-yloxy)alkoxy]-4-biphenylcarboxylates, were prepared. The compounds exhibited enantiotropic nematic behavior. The melting points, the nematic-isotropic transition temperatures, and the entropy changes associated with the nematic-isotropic transition showed remarkable odd-even effects as the length of the spacers was varied, in which the even members exhibited higher values. The liquid-crystalline properties were compared with those of analogous symmetric trimers. The nematic-isotropic transition temperatures and the associated entropy changes of the nonsymmetric trimers exhibited lower values in comparison with those of the symmetric trimers.