| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a liquid crystal compound having an excellent balance of physical properties such as exhibiting a negative dielectric constant anisotropy together with having comparatively high clear point or a small viscosity, a proper optical anisotropy and compatibility with other liquid crystal compounds, etc., by solving problems that conventional compounds exhibiting a negative dielectric constant anisotropy although exhibiting a negative dielectric constant anisotropy of relatively large numeric value are not appropriate in the balance of properties as a liquid crystal material because having a low clear point or a large viscosity. <P>SOLUTION: The invention relates to a compound represented by formula (1) or (2). In the formula, each of R<SB>a</SB>and R<SB>b</SB>is a hydrogen atom or 1-20C alkyl; each of A<SP>1</SP>, A<SP>11</SP>, A<SP>12</SP>, A<SP>2</SP>, A<SP>21</SP>and A<SP>22</SP>is a cyclic group; each of Y, W, Z<SP>11</SP>, Z<SP>12</SP>, Z<SP>2</SP>, Z<SP>21</SP>and Z<SP>22</SP>is a bond group; and each of j, k, m, n, p and q is 0 or 1 with the proviso that the sum thereof is 1 to 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
