The biaryl unit is a fundamental feature of a large number of nonlinear optical materials and liquid crystals. Unsymmetrical biaryls (see figure) have been shown to be of particular interest, exhibiting amongst other things a high electro-optic coefficient. The synthesis of the new unsymmetrical biaryls involves the palladium-complexcatalyzed coupling of an organometallic derivative with an aromatic halide.
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