M. A. Pereira
Federal University of Alagoas
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Acta Crystallographica Section C-crystal Structure Communications | 1995
C. A. De Simone; Julio Zukerman-Schpector; M. A. Pereira; L. D. Cuong; Ivan da Rocha Pitta; Suely Lins Galdino; E. L. Cavalcanti De Amorim
The imidazolidinedione and fluorobenzylidene rings in the title compound, C 17 H 12 BrFN 2 O 2 , are coplanar ; the dihedral angle between this plane and the plane of the substituted bromobenzyl ring is 104.9(2)°. The molecules in the crystal are held together by hydrogen bonds and van der Waals interactions.
Acta Crystallographica Section C-crystal Structure Communications | 1996
C. A. De Simone; M. A. Pereira; C. Luu‐Duc; Ivan da Rocha Pitta; Suely Lins Galdino; E. H. C. Menezes; Julio Zukerman-Schpector
The title compound, C17H13FN2O2 has a dihedral angle of 160.5 (1)° between the fluorobenzylidene and the imidazolidinedione rings with an angle of 109.3 (1)° between the latter ring and the benzyl ring . The molecules are linked by a N—H⋯O hydrogen bond [N⋯O 2.852 (3) A].
Acta Crystallographica Section E: Crystallographic Communications | 2007
C. A. De Simone; L. C. de Souza; D. de O. Imbroisi; J. F. T. Oliveira; M. A. Pereira
In the title compound, C12H12O3, the heterocyclic ring adopts a half-chair conformation. C–H⋯O hydrogen bonds form a three-dimensional network.
Zeitschrift Fur Kristallographie-new Crystal Structures | 2005
Μ. M. S. Humberto; V. R. M. Da Silva; A. E. G. Sant'ana; C. A. De Simone; V. R. S. Malta; M. A. Pereira
C41H58O2, monoclinic, C121 (no. 5), a = 25.573(3) A, £>= 10.453(1) A, c = 14.159(2) A,/3 = 113.674(8), V = 3466.3 A, Ζ = 4, Rp(F) = 0.069, wR^F) = 0.180, T= 120 K. Source of material The crystals of the 3/H5-phenyl-(2£,4E)-penta-2,4-dienoyloxy]olean-12-ene were obtained by recrystallization from MeOH at room temperature.
Zeitschrift Fur Kristallographie-new Crystal Structures | 2005
Laura Cristiane de Souza; Dennis de Oliveira Imbroisi; C. A. De Simone; M. A. Pereira; V. R. S. Malta; J. F. T. Oliveira
Abstract C8H10O3, monoclinic, P121/c1 (no. 14), a = 5.1640(2) Å, b = 19.979(1) Å, c = 7.5840(4) Å, β = 104.540(2)°, V = 757.4 Å3, Z = 4, Rgt(F) = 0.049, wRref(F2) = 0.169, T = 293 K.
Zeitschrift Fur Kristallographie-new Crystal Structures | 2004
M. C. B. S. Nascimento; Gustavo L. Santos; V. R. S. Malta; C. A. de Simone; M. A. Pereira; Lucia M. Conserva; A. M. Anselmo; Raimundo Braz-Filho
C 21 H 34 O 4 , orthorhombic, P2 1 2 1 2 1 (no. 19), a = 8.4324(2) A, b = 10.7639(2) A, c = 21.1593(6) A, V= 1920.5 A 3 , Z= 4, R gt (F) = 0.051, wR ref (F 2 ) = 0.125, T= 293 K.
Acta Crystallographica Section C-crystal Structure Communications | 2000
N. T. Do Valle; C. A. De Simone; M. A. Pereira; Marília Oliveira Fonseca Goulart
Interest in the title structure, C20H24O2, lies in the novel cis ring junction between the three- and seven-membered rings. This stereochemical arrangement causes the methylene moiety and the cycloheptane ring to be twisted out of the plane of the aromatic ring. The cyclopropane ring is also twisted out of the plane of the aromatic system. The molecules are linked by an O—H⋯O hydrogen bond [O⋯O 2.741 (3) A].
Acta Crystallographica Section C-crystal Structure Communications | 1996
C. A. De Simone; Marília Oliveira Fonseca Goulart; M. A. Pereira; Julio Zukerman-Schpector
The cyclohexene ring in the title compound, C 15 H 20 O 4 , adopts a half-chair conformation. The C(11) and O(3) atoms are cis to each other. The molecules are linked through intermolecular hydrogen bonds.
Zeitschrift Fur Kristallographie-new Crystal Structures | 2005
A.B.F. da Silva; C. A. De Simone; A. E. G. Sant’Ana; M. A. Pereira; V. R. S. Malta
Anais do Salão Internacional de Ensino, Pesquisa e Extensão | 2010
Luísa Souza; Ariane Xarão; M. A. Pereira