ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

An oscillopolarographic determination of quinine alkaloids

L. Molnár and K. Molnárová

Slovak Academy of Sciences, Bratislava

Abstract: The relation of the shape of the oscillogram to the constitution of quinine alkaloids and their derivs. was studied. An idealized shape of the oscillogram is discussed; it has 3 peaks: A indicating a volumetric effect, B and C corresponding to the redn. of C:N double bond in the quinine ring. It was detd. that if the substituent on C 6 of quinine ring is an ethoxy or OH group, the C peak is deeper. If C 6 is not substituted, the peaks B and C are deeper. If isoamyloxy or iso.ovrddot.octyloxy group is substituted, peak B is deeper. The length of the chain of the substituent on C 6 affects the shape of the oscillogram. Oscillograms taken with 1 cycle on 1 drop are described and compared with oscillograms taken on the drop electrode in LiCl electrolyte. Oscillograms of quinoline showing a peak corresponding to the redn. are compared with oscillograms of tetrahydroquinoline with a peak due to a volumetric effect. The results of frequency analyses indicate that there is no redn. of the cyclization products.

Full paper in Portable Document Format: 141a21.pdf (in Slovak)

Chemical Papers 14 (1) 21–31 (1960)