A monoclinic polymorph of 3,7,7-trimethyl-1-phenyl-5,6,7,8-tetrahydro-1H-pyrazolo[3,4-b]quinolin-5-one.
A second, monoclinic, polymorph of the title compound, C19H19N3O, is reported. In this polymorph, the molecules are linked into chains by paired C-H...pi hydrogen bonds and the chains are linked into sheets by pi stacking interactions.
Grupo de Investigación de Compuestos Heterocíclicos, Departamento de Química, Universidad de Valle, AA 25360 Cali, Colombia.
Jaime
J
Mera
Jairo
J
Quiroga
Justo
J
Cobo
John N
JN
Low
Christopher
C
Glidewell