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Figure 2 Part of the crystal structure of (I) showing C—H⋯O hydrogen bonds generating R22(18)(Red dotted lines) and R22(14) (blue dotted lines) centrosymmetric dimers, forming zigzag chains along [001]. [Symmetry codes:(i)1 − x, −y, −z; (ii)1 − x, −1 − y, 1 − z; (iii)x, −1 + y, 1 + z; (iv)1 − x, −2 − y, 2 − z]. |