The second orthorhombic polymorph of zwitterionic metanilic acid at 130 K | Zendy

Smith Graham | Zendy; Wermuth Urs D. | Zendy; Young David J. | Zendy; White Jonathan M. | Zendy

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The second orthorhombic polymorph of zwitterionic metanilic acid at 130 K

Author(s) -

Smith Graham,

Wermuth Urs D.,

Young David J.,

White Jonathan M.

Publication year - 2006

Publication title -

acta crystallographica section e

Language(s) - English

Resource type - Journals

ISSN - 1600-5368

DOI - 10.1107/s1600536806003953

Subject(s) - orthorhombic crystal system , hydrogen bond , sulfonic acid , crystallography , benzene , chemistry , crystal structure , crystal (programming language) , polymer , molecule , polymer chemistry , organic chemistry , computer science , programming language

The low‐temperature (130 K) crystal structure of the second orthorhombic polymorph of metanilic acid (3‐aminobenzenesulfonic acid), C 6 H 7 NO 3 S, shows the presence of two independent and conformationally similar molecules of the zwitterionic acid (3‐ammoniobenzenesulfonate) in the asymmetric unit; these interact through hydrogen bonding to give a cyclic R 2 2 (14) association. Peripheral hydrogen bonding gives a three‐dimensional framework polymer, such as was found in the earlier polymorph [Hall & Maslen (1965), Acta Cryst. 18 , 301–306], but the overall structural make‐up is significantly different.

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