
TY  - JOUR
A1  - Lynch, DE 
A1  - Smith, G 
A1  - Byriel, KA 
A1  - Kennard, CHL 
T1  - Molecular Cocrystals of Carboxylic Acids. I. The Crystal Structures of the Adducts of Indole-3-acetic-Acid With Pyridin-2(1H)-one, 3,5-Dinitrobenzoic Acid and 1,3,5-Trinitrobenzene
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1991
VL  - 44
IS  - 6
SP  - 809
EP  - 819
KW  - 
UR  - https://doi.org/10.1071/CH9910809 
N2  - Three molecular cocrystal adducts of the plant hormone indole-3-acetic acid ( iaa ) have been prepared and their structures determined by X-ray diffraction. They are indole-3-acetic acid-bis [pyridin-2(1H)-one] (1), indole-3-acetic acid-3,5-dinitrobenzoic acid (2) and indole-3-acetic acid-1,3,5-trinitrobenzene (3). Complexes (2) and (3), which may be prepared in a solid-state reaction, are orange and are structurally similar, having significant &#960;-&#960; indole -benzene ring interactions. However, the colourless complex (1) shows no &#960;-&#960; ring interactions. In complex (2), the 3,5-dinitrobenzoic acid molecules form hydrogen-bonded cyclic dimers (O&#8230;O, 2.64 &#506;), while in (3) the indole-3-acetic acid molecules form dimers (O&#8230;O, 2.66 &#506;). This feature contrasts with the structure of adduct (1) in which the pyridin-2(1H)-one molecules exist as dimers [N&#8230;O, 2.79, 2.74 &#506;] analogous to those found in the parent compound. 
ER  -

