N. FATHIMA ET AL.
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set notation R22(24) (Bernstein et al., 1995). The π-π
stacking interaction [Figure 4] between the two pyrimi-
dine rings being separated by a distance of 3.424(1)Å
(symmetry code: 1 – x, 1 – y, –z) further strengthe ns the
supramolecular structure.
5. Conclusions
In this paper we report the synthesis of 9-Methyl-3- thi-
ophen-2-yl-thieno [3, 2-e] [1, 2, 4] triazolo [4, 3-c] py-
rimidine-8-carboxylic acid ethyl ester. The X-ray ana-
lysis was carried o ut in order to establish supramolecular
assembly in terms of possible intermolecular interac-
tions. In the present work the crystallographic studies
aims at highlighting the importance of hydrogen bond
interaction which is one of the most important of all di-
rectional in- termolecular interactions. Here several hy-
drogen bond- ing interactions of the triazolo-pyrimidine
groups and the interaction between carboxylic acid ester
and the pyrimi- dine group between the two different
molecule s have b een demonstrated.
6. Supplementary Material
Crystallograp hic data for the s tructure (3) repo rted in this
paper have been deposited with the Cambridge data cen-
tre. The deposition number is CCDC 787335.
7. Acknowledgements
N. S. B is thankf ul to the Uni versit y Gr ants Co mmissio n
(UGC), India for the financial a ssistance.
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