A hydrogen-bonded dimer in 6-(4-bromophenyl)-3-methyl-1-phenyl-4,5-dihydro-1H-pyrazolo[3,4-b]pyridi ne and a chain of rings built from N-H center dot center dot center dot N and C-H center dot center dot center dot pi (pyridine) hydrogen bonds in 3-(4-nitrophenyl)-4-phenyl-1H-pyrazolo[3,4-b]pyridine

作者：Quiroga Jairo; Trilleras Jorge; Hursthouse Michael B; Cobo Justo; Glidewell Christopher^*

来源：Acta Crystallographica Section C-Crystal Structure Communications, 2010, 66: O163-O167.

DOI：10.1107/S0108270110006451

In 6-(4-bromophenyl)-3-methyl-1-phenyl-4,5-dihydro-1H-pyrazolo[ 3,4-b] pyridine, C(19)H(16)BrN(3), the reduced pyridine ring adopts a conformation that is close to a screw-boat form. Molecules are linked by pairs of symmetry-related C-H center dot center dot center dot pi (arene) hydrogen bonds into cyclic centrosymmetric dimers. Molecules of 3-(4-nitrophenyl)-4-phenyl-1H-pyrazolo[3,4-b] pyridine, C(18)H(12)N(4)O(2), are linked into centrosymmetric R(2)(2)(8) dimers by pairs of symmetry-related N-H center dot center dot center dot N hydrogen bonds, and these dimers are linked by pairs of C-H center dot center dot center dot pi (pyridine) hydrogen bonds to form a chain of edge-fused rings, or a molecular ladder, along [100]. The molecular aggregation in this compound is completed by two weak C-H center dot center dot center dot O hydrogen bonds, one of which links the chains along [100] into sheets.

• 出版日期2010-4