
TY  - JOUR
A1  - Devillanova, FA 
A1  - Verani, G 
T1  - An infrared investigation of Pyrrolidine-2-thione and -2-selenone
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1978
VL  - 31
IS  - 12
SP  - 2609
EP  - 2613
KW  - 
UR  - https://doi.org/10.1071/CH9782609 
N2  - Pyrrolidine-2-thione and -2-selenone together with their N-deutero and S- and Se-methiodide derivatives have been studied by i.r. spectroscopy over the range 4000-200 cm-1. C=S and C=Se contribute to the bands at around 1000 cm-1 and below 600 cm-1. In pyrrolidine-2-selenone, the band at 1005 cm-1 has been attributed to v(CSe). This value is the highest wave number for all similar pentaatomic rings, which we have previously investigated, and indicates a greater double-bond character in CSe. In the low-frequency region two bands at 497 and 334 cm-1 in pyrrolidine-2- thione and two others at 352 and 280 cm-1 in the selenium analogue are undoubtedly attributable to the C=S and C=Se modes respectively. 
ER  -

