
TY  - JOUR
A1  - Woodruff, M 
A1  - Polya, JB 
T1  - Tautomerism of pyrazolidine-3,5-diones. II. Infrared spectra
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1977
VL  - 30
IS  - 2
SP  - 421
EP  - 425
KW  - 
UR  - https://doi.org/10.1071/CH9770421 
N2  - The tautomerism of a number of N1- and N1,N2-substituted monotriazolylpyrazolidine-3,5-diones and their phenyl analogues has been examined by infrared spectroscopy. The diketo tautomer is the predominant form, both in the solid state and in chloroform solution. Monosodium salts of 4,4-dialkyl-1-triazolylpyrazolidinediones show unusual absorption which indicates strong hydrogen bonding in the compounds; a three-centre hydogen bond is proposed to explain the observed spectra. 
ER  -

