ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The low and high resolution fluorescence excitation spectra of d3-tryptamine have been observed in the environment of a cold, supersonic molecular beam. As in the case of h3-tryptamine, six bands due to the origins of different conformers have been found in the low resolution spectrum of deuterated tryptamine. A previous paper reported that conformers labeled A and B and conformers labeled D and E of tryptamine have identical rotational structures. However, for deuterated tryptamine those conformers have distinguishable rotational structures. Analysis of the rotational structure in the high resolution electronic spectra of five of the bands was used to determine the geometries of the different conformers. Conformers A, B, and F have a gauche conformation with respect to the rotation about the Cα–Cβ bond while conformers D and E have an eclipsed conformation. The geometries of conformers A and B and conformers D and E differ only in the orientation of the amino group. In these structures the angles of the internal rotation of the amino group are 180°, 60°, 180°, 60°, and −60° for conformers A,B, and D–F, respectively. Feature C consists of two overlapped conformers, and it is suggested that these conformers have the amino group trans to the indole ring.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.457573
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