Charge-assisted hydrogen bonding in salts of 2-amino-1H-benzimidazole with 3-phenylpropynoic acid and oct-2-ynoic acid
2015 ◽
Vol 71
(2)
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pp. 146-151
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Keyword(s):
The 100 K structures of two salts, namely 2-amino-1H-benzimidazolium 3-phenylpropynoate, C7H8N3+·C9H5O2−, (I), and 2-amino-1H-benzimidazolium oct-2-ynoate, C7H8N3+·C8H11O2−, (II), both have monoclinic symmetry (space groupP21/c) and display N—H...O hydrogen bonding. Both structures show packing with corrugated sheets of hydrogen-bonded molecules lying parallel to the [001] direction. Two hydrogen-bonded ring motifs can be identified and described with graph setsR22(8) andR44(16), respectively, in both (I) and (II). Computational chemistry calculations performed on both compounds show that the hydrogen-bonded ion pairs are more energetically favourable in the crystal structure than their hydrogen–bonded neutral molecule counterparts.
1995 ◽
Vol 50
(8)
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pp. 1146-1150
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1995 ◽
Vol 50
(5)
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pp. 712-716
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1996 ◽
Vol 51
(1)
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pp. 85-89
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Keyword(s):
2014 ◽
Vol 70
(9)
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pp. 148-152
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Keyword(s):
1996 ◽
Vol 51
(2)
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pp. 229-232
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Keyword(s):
1997 ◽
Vol 52
(4)
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pp. 457-461
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Keyword(s):
1995 ◽
Vol 50
(5)
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pp. 717-720
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