3-Formyl- and 3-acetylpyridine N(4)-methylthiosemicarbazone, H3Fo4M and H3A
c4M, respectively, have been prepared, their. structures solved and IR, NMR
:md UV spectra recorded. Intramolecular and intermolecular hydrogen bondin
g are both present, but the mode of the intermolecular interaction is diffe
rent in the two compounds. Further, there is a significant difference in th
eir angles between the mean planes of the pyridine ring and thiosemicarbazo
ne moiety. The H-1 NMR spectral studies show significant differences betwee
n the two. (C) 2000 Elsevier Science B.V. All rights reserved.