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Table 2 The geometry of the hydrogen bonds (Å, ˚)

From: Synthesis and crystal structures of 2-methyl-4-aryl-5-oxo-5H-indeno [1,2-b] pyridine carboxylate derivatives

D-HA D (D-H) D (HA) D (DA) <(DHA)
Compound (I)
C (20) -H (20)…O (1)i 0.93 2.40 3.232(3) 149
Compound (II)
C (14)-H (14A)…O (2) 0.96 2.44 3.132(2) 128
C (5)-H (5)…O (3)ii 0.93 2.60 3.472(2) 157
C (22)-H (22)…O (1)iii 0.93 2.58 3.458(2) 157
C (16) -H (16A)…Cg(3)iv 0.97 2.72 3.566(2) 146
  1. Symmetry transformations used: (i) x + 1/2, −y − 1/2, z + 1/2; (ii) x, y-1, z-1; (iii) 1-x,-y,-z;(iv) -x,-y,-1-z; Cg3 centroid atom of the ring (C2-C7).