A stacked pyrazolo[3,4-<i>d</i>]pyrimidine-based flexible molecule: the effect on stacking of a bulky isopropyl group in comparison with a methyl/ethyl group
作者:Kamlakar Avasthi、Sheikh M. Farooq、Diwan S. Rawat、Ashoke Sharon、Prakas R. Maulik
DOI:10.1107/s0108270103016676
日期:2003.9.15
In the crystal structure of 1,3-bis(4,6-diisopropylsulfanyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)propane, C25H36N8S4, the pairs of pyrazolo[3,4-d] pyrimidine rings in the molecule stack as a result of intramolecular pi-pi interactions between the heterocyclic rings. The crystal packing also exhibits an intermolecular C-H...pi interaction between one methyl group of an isopropyl group and a pyrazolo[3,4-d]pyrimidine ring.