
TY  - JOUR
A1  - Smith, Graham 
A1  - Lynch, Daniel E. 
A1  - Kennard, Colin H. L. 
A1  - Byriel, Karl A. 
T1  - The Preparation and Crystal Structures of the 1 : 1 Adducts of 5-Nitrosalicylic Acid and 2-Chloro-3,5- dinitrobenzoic Acid with Triphenylphosphine Oxide
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1998
VL  - 51
IS  - 5
SP  - 437
EP  - 440
KW  - 
UR  - https://doi.org/10.1071/C97192 
N2  - The (1 : 1) adducts of 5-nitrosalicylic acid (5-nsa) and 2-chloro-3,5-dinitrobenzoic acid (cdnba) with triphenylphosphine oxide (tppo), &#91;(5-nsa)(tppo)&#93; (1) and &#91;(cdnba)(tppo)&#93; (2), have been prepared and their structures determined by X-ray diffraction and reffned to residuals R 0&#183;045 (1) and 0&#183;043 (2) for 2540 and 3265 observed reflections respectively. Crystals of both adducts are monoclinic, space group P21/c (1) and P21/a (2), with 4 dimer units in cells of dimensions a 16&#183;217(1), b 7&#183;6807(8), c 19&#183;697(4) &#197;, &#946; 113&#183;357(8)&#176; &#91;for (1)&#93; and a 16&#183;009(5), b 8&#183;687(1), c 17&#183;640(5) &#197;, &#946; 90&#183;30(1)o &#91;for (2)&#93;. In both examples, the two molecules comprising the asymmetric unit are linked by a single hydrogen bond between the proton of the carboxylic acid and the phosphoryl oxygen of tppo &#91;O- - -O, 2&#183;524(3) &#197; (1); 2&#183;72(3) &#197; (2)&#93;, while, in each case, the additional functional groups of the acid are not involved in any other intermolecular hydrogen-bonding interactions. 
ER  -

