TY - JOUR
T1 - 10-(4-chlorophenyl)-7-methyl-5,6-dihydrobenzo[h]pyrazolo[5,1-b]quin-azoline and 2-(4-chlorophenyl)-5-methyl-6,7-dihydrobenzo[h]pyrazolo-[1,5-a]quinazoline: isomeric molecules linked into hydrogen-bonded dimers or pi-stacked chains
AU - Low, J N
AU - Cobo, J
AU - Quiroga, J
AU - Portilla, J
AU - Glidewell, C
PY - 2004/8
Y1 - 2004/8
N2 - The isomeric title compounds 10-(4-chlorophenyl)-7-methyl-5,6-dihydrobenzo[h]pyrazolo[5,1-b]quinazoline, (I), and 2-(4-chlorophenyl)-5-methyl-6,7-dihydrobenzo[h]pyrazolo[1,5-a]-quinazoline, (II), both C21H16ClN3, exhibit peripheral delocalization in the heteroaromatic portion of the fused ring system. The molecules of ( I) are linked into centrosymmetric dimers by a single C-H...pi( arene) hydrogen bond, and the molecules of (II), where Z' = 2, are linked by pi-pi stacking interactions into chains in which the two types of molecules alternate.
AB - The isomeric title compounds 10-(4-chlorophenyl)-7-methyl-5,6-dihydrobenzo[h]pyrazolo[5,1-b]quinazoline, (I), and 2-(4-chlorophenyl)-5-methyl-6,7-dihydrobenzo[h]pyrazolo[1,5-a]-quinazoline, (II), both C21H16ClN3, exhibit peripheral delocalization in the heteroaromatic portion of the fused ring system. The molecules of ( I) are linked into centrosymmetric dimers by a single C-H...pi( arene) hydrogen bond, and the molecules of (II), where Z' = 2, are linked by pi-pi stacking interactions into chains in which the two types of molecules alternate.
U2 - 10.1107/S0108270104015616
DO - 10.1107/S0108270104015616
M3 - Article
SN - 1600-5759
VL - 60
JO - Acta Crystallographica Section C-Crystal Structure Communications
JF - Acta Crystallographica Section C-Crystal Structure Communications
ER -