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A comparative study of the crystal structure and luminescence and mechanochromic properties of two new luminescent dyes – ortho-hydroxy-, para-benzoyloxydibenzoylmethanate (1) and ortho-hydroxy-, para-anisoyloxybenzoyl-, and anisoylmethanate (2) of boron difluoride – has been performed. The presence of a hydroxyl group in the ortho-position of one of phenyl rings is responsible for formation of an...