title: Crystal structure of (E)-2,6-di-tert-butyl-4-{[2-(2,4-di-nitro-phen-yl)hydrazinylidene]meth-yl}phenol.
abstract: The essential part (including all the non-hydrogen atoms except two methyl carbons) of the mol-ecule of the title compound, C21H26N4O5, lies on a mirror plane, which bis-ects thet-butyl groups. The conformation of the C=N bond of this Schiff base compound isE, and there is an intra-molecular N-H⋯O hydrogen bond present, forming anS(6) ring motif. In the crystal, mol-ecules are linkedviaO-H⋯O hydrogen bonds, forming zigzag chains propagating along thea-axis direction. There are no other significant inter-molecular contacts present.
authors.affiliation: Department of Chemistry, College of Science, Sultan Qaboos University, PO Box 36, Al-Khod 123, Muscat, Sultanate of , Oman.
authors.forename: Md Serajul Haque
authors.identifier: https://orcid.org/0000-0002-4678-9508
authors.initials: MS
authors.lastname: Faizi
authors.affiliation: Ondokuz Mayıs University, Arts and Sciences Faculty, Department of Physics, 55139 Samsun, Turkey.
authors.forename: Necmi
authors.identifier: https://orcid.org/0000-0003-0660-4721
authors.initials: N
authors.lastname: Dege
authors.affiliation: Department of Chemistry, College of Science, Sultan Qaboos University, PO Box 36, Al-Khod 123, Muscat, Sultanate of , Oman.
authors.forename: Ashanul
authors.identifier: https://orcid.org/0000-0002-6780-632X
authors.initials: A
authors.lastname: Haque
authors.affiliation: Department of General Chemistry, O. O. Bohomolets National Medical University, Shevchenko Blvd. 13, 01601 Kiev, Ukraine.
authors.forename: Valentina A
authors.initials: VA
authors.lastname: Kalibabchuk
authors.affiliation: Ondokuz Mayıs University, Arts and Sciences Faculty, Department of Physics, 55139 Samsun, Turkey.
authors.forename: Mustafa
authors.identifier: https://orcid.org/0000-0002-1227-2877
authors.initials: M
authors.lastname: Cemberci
keywords: 2,4-di­nitro­phenyl­hydrazine; 3,5-di-tert-butyl-4-hy­droxy­benzaldehyde; crystal structure; di-tert-butyl­phenol; di­nitro­benzene; hydrazine; hydrogen bonding