title: Crystal structures ofp-substituted derivatives of 2,6-di-methyl-bromo-benzene with ½ ≤Z' ≤ 4.
abstract: The crystal structures of four bromo-arenes based on 2,6-di-methyl-bromo-benzene are reported, which are differentiated according the functional groupXplacedparato the Br atom:X= CN (4-bromo-3,5-di-methyl-benzo-nitrile, C9H8BrN), (1),X= NO2(2-bromo-1,3-dimethyl-5-nitro-benzene, C8H8BrNO2), (2),X= NH2(4-bromo-3,5-di-methyl-aniline, C8H10BrN), (3) andX= OH (4-bromo-3,5-di-methyl-phenol, C8H9BrO), (4). The content of the asymmetric unit is different in each crystal,Z' = ½ (X= CN),Z' = 1 (X= NO2),Z' = 2 (X= NH2), andZ' = 4 (X= OH), and is related to the mol-ecular symmetry and the propensity ofXto be involved in hydrogen bonding. In none of the studied compounds does the crystal structure feature other non-covalent inter-actions, such as π-π, C-H⋯π or C-Br⋯Br contacts.
authors.affiliation: Centro de Graduados e Investigación en Química, Instituto Tecnológico de Tijuana, Apartado Postal 1166, 222000 Tijuana, B.C., Mexico.
authors.forename: Angélica
authors.initials: A
authors.lastname: Navarrete Guitérrez
authors.affiliation: Centro de Graduados e Investigación en Química, Instituto Tecnológico de Tijuana, Apartado Postal 1166, 222000 Tijuana, B.C., Mexico.
authors.forename: Gerardo
authors.initials: G
authors.lastname: Aguirre Hernández
authors.affiliation: Instituto de Física, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y 18 Sur, 72570 Puebla, Pue., Mexico.
authors.forename: Sylvain
authors.initials: S
authors.lastname: Bernès
keywords: Z′; bromo­arenes; crystal structure; hydrogen bond; mol­ecular symmetry