TY - JOUR
T1 - 2,5-Dimethyl-6,7-dihydrobenzo[h]-pyrazolo[1,5-a]quinazoline and 2-tert-butyl-5-methyl-6,7-dihydrobenzo[h]-pyrazolo[1,5-a]quinazoline
AU - Portilla, Jaime
AU - Quiroga, Jairo
AU - Cobo, Justo
AU - Low, John N.
AU - Glidewell, Christopher
PY - 2007/8
Y1 - 2007/8
N2 - In both 2,5- dimethyl- 6,7- dihydrobenzo[ h] pyrazolo[ 1,5- a]quinazoline, C16H15N3, ( I), and 2- tert- butyl- 5- methyl- 6,7dihydrobenzo[ h] pyrazolo[ 1,5- a] quinazoline, C19H21N3, ( II), which crystallizes with Z' = 2 in the space group P1, the nonaromatic carbocyclic rings adopt screw- boat conformations. The molecules of ( I) are linked into chains of rings by a combination of C - H center dot center dot center dot N and C - H center dot center dot center dot pi( arene) hydrogen bonds, while in ( II) there are no hydrogen bonds of any kind.
AB - In both 2,5- dimethyl- 6,7- dihydrobenzo[ h] pyrazolo[ 1,5- a]quinazoline, C16H15N3, ( I), and 2- tert- butyl- 5- methyl- 6,7dihydrobenzo[ h] pyrazolo[ 1,5- a] quinazoline, C19H21N3, ( II), which crystallizes with Z' = 2 in the space group P1, the nonaromatic carbocyclic rings adopt screw- boat conformations. The molecules of ( I) are linked into chains of rings by a combination of C - H center dot center dot center dot N and C - H center dot center dot center dot pi( arene) hydrogen bonds, while in ( II) there are no hydrogen bonds of any kind.
KW - DIMERS
KW - CHAINS
U2 - 10.1107/S0108270107029010
DO - 10.1107/S0108270107029010
M3 - Article
SN - 1600-5759
VL - 63
JO - Acta Crystallographica Section C-Crystal Structure Communications
JF - Acta Crystallographica Section C-Crystal Structure Communications
ER -