Showa Shell Sekiyu Kabushiki Kaisha

Toru Ooide

Yoshihiko Aihara

Tadaaki Isozaki

Noriko Yamakawa

Yoshiichi Suzuki

Hiroyuki Mogamiya

Shigenori Sakuma

Yuvraj S Negi

Hioyuki Mogamiya

Yuvra Negi

Liquid crystal compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 each is a C.sub.1-18 alkyl group or an aralkyl group, R' is haloalkyl group, X is --O--, --CO--, --COO-- or direct bond, Y is --COO--, --OCO-- or --CH.sub.2 O--, (A) and (B) each is ##STR2## and p and l each is zero or one.

Liquid crystal compound

Antiferroelectric liquid crystal compounds are provided which have the formula ##STR1## wherein R.sub.1 represents an alkyl group having 5-18 carbon atoms,

Liquid crystal compounds

Liquid crystal compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 each is a C.sub.1-18 alkyl group or an aralkyl group, R' is a haloalkyl group, X is --0--, --CO--, --COO-- or direct bond, Y is --COO--, --OCO-- or --CH.sub.2 O--, (A) and (B) each is ##STR2## and p and l each is zero or one.

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Tokyo, Japan

Toru Ooide