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Figure 2 The unit cell and crystal packing of (I) viewed approximately along the a axis with the asymmetric unit covered by a grey ellipse. H atoms not involved in short intermolecular contacts (indicated by dotted lines) have been omitted for clarity. The molecules are connected by C21—H21⋯O1"(-x, y-1/2-y, 1/2-z) hydrogen bonds into two-dimensional sheets with C(4) chain and (26) ring motifs (for graph set notation, see Etter et al., 1990). An intermolecular N3⋯N3#(1-x,-y,-z) contact has been highlighted in orange. |