G. M. Brown, R. E. Marsh
Mar 1, 1963
Citations
1
Influential Citations
17
Citations
Journal
Acta Crystallographica
Abstract
The structure of crystals of 2-amino-3-methylbenzoic acid has been determined and refined extensively by three-dimensional least-squares techniques. The crystals are monoclinic, space group _P21/c, with a=11.480, b =4.044, c= 15-792 /~ and fl=91 ° 18". There are four molecules in the unit cell, and the calculated density is 1.361 g.cm. -~. Positional and temperature-factor parameters for the eleven heavy atoms and positional coordinates for the nine hydrogen atoms in the molecule were included in the refinement. In addition, separate visual intensity estimates made by the two authors were treated independently, yielding two sets of final parameters. There are no significant differences in the two sets of parameters. Except for two of the hydrogen atoms of the methyl group, the 2-amino-3-methylbenzoic molecule is approximately planar. The bond distances suggest an appreciable contribution of the form