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1.
Acta Crystallogr Sect E Struct Rep Online ; 68(Pt 4): o1128, 2012 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-22589983

RESUMO

In the title compound, C(15)H(17)NO(8), the nitro group is essentially coplanar with the aromatic ring [dihedral angle = 6.4 (3) Å]. The five-membered ring has a twist conformation. In the crystal, C-H⋯O inter-actions link the mol-ecules into a helical chain propagating along [010].

2.
Acta Crystallogr Sect E Struct Rep Online ; 68(Pt 3): o558, 2012 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-22412479

RESUMO

In the title compound, C(12)H(14)N(2)O(5), the five-membered 1,3-dioxolane ring has a twisted conformation. In the crystal, N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into a two-dimensional network lying parallel to the ab plane. There are also C-H⋯π inter-actions present in the crystal structure.

3.
Acta Crystallogr Sect E Struct Rep Online ; 67(Pt 12): o3263-4, 2011 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-22199772

RESUMO

The title compound, C(8)H(8)Br(2)O(2), crystallized with two independent mol-ecules (A and B) in the asymmetric unit. They differ in the conformation of the 2-hy-droxy-ethyl chain with the C-C-C-O torsion angle being -68.0 (12)° in mol-ecule A and 172.2 (9)° in mol-ecule B. In the crystal, the A mol-ecules are linked via pairs of O-H⋯O hydrogen bonds, forming inversion dimers, while the B mol-ecules are linked via an O-H⋯O hydrogen bond, forming a polymeric chain propagating in [010]. In addition, there are O-H⋯O and O-H⋯Br hydrogen bonds, and Br⋯Br [3.599 (2) Å] and π-π inter-actions [centroid-centroid distances = 3.581 (6) and 3.931 (6) Å], leading to the formation of a two-dimensional network parallel to (001).

4.
Acta Crystallogr Sect E Struct Rep Online ; 66(Pt 11): o2785, 2010 Oct 09.
Artigo em Inglês | MEDLINE | ID: mdl-21588983

RESUMO

In the title compound, C(15)H(13)NO(2), all atoms of the carbazole group are coplanar (r.m.s. deviation = 0.005 Å), and the dihedral angle between this plane and C-O-C plane of oxane group is 57.1 (4)°. The crystal packing is stabilized by an N-H⋯O hydrogen bond, resulting in infinite supra-molecular chains along [001].

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