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Table 2 Hydrogen-bond geometries for compounds (I-V)

From: Investigation of supramolecular synthons and structural characterisation of aminopyridine-carboxylic acid derivatives

D–H · · · A d(D–H) (Å) d(H · · · A) (Å) d(D · · · A) (Å) Angle(D–H · · · A) (°)
I     
N2—H1N2 · · · N2i 0.83 2.55 3.326 (2) 155
N2—H2N2 · · · N1ii 0.90 2.22 3.112 (2) 173
C4—H4A · · · Cl1iii 0.93 2.83 3.623 (1) 144
II     
O1—H1N2 · · · O2 0.89 1.99 2.872 (2) 172
N2—H1N2 · · · O2iv 0.87 2.04 2.905 (2) 172
N2—H2N2 · · · O2 0.88 (3) 2.03 (3) 2.906 (2) 173 (2)
III     
N2—H1N2 · · · O2v 0.86 2.10 2.940 (6) 165
O1—H1O1 · · · N1vi 0.82 1.98 2.791 (7) 171
N3—H2N3 · · · O2 0.86 2.06 2.686 (6) 129
IV     
O1—H1O1 · · · N1 0.84 1.87 2.703 (2) 170
N2—H1N2 · · · O2vii 0.90 2.15 (2) 2.952 (2) 149
N2—H2N2 · · · O2 0.88 2.06 2.934 (2) 169
V     
N2—H2AB · · · O2Aviii 0.86 2.12 2.963 (3) 167
N2A—H2AC · · · O2Aix 0.82 2.34 3.060 (4) 141
O1A—H1OA · · · N1Ax 0.82 1.88 2.685 (3) 168
O1B—H1OB · · · N1Bviii 0.82 1.88 2.684 (3) 169
C3A—H3AA · · · O3Bxi 0.93 2.50 3.157 (4) 128
  1. Symmetry codes: (i) = 1-x,-1/2 + y,1/2-z; (ii) = 1-x,-y,1-z; (iii) = x,-1/2-y,-1/2 + z; (iv) = 1/2 + x,3/2-y,2-z; (v) = -1 + x,y,z; (vi) = -1/2 + x,3/2-y,2-z; (vii) = 1-x,1-y,1-z; (viii) = x,-1 + y,z; (ix) = 1-x,2-y,1-z; (x) = x,1 + y,z; (xi) = 1 + x,y,z.