3,4-Dimethyl-<i>N</i>-[(<i>E</i>)-3-nitrobenzylidene]-1,2-oxazol-5-amine
Asiri, Abdullah M.; Khan, Salman A.; Tahir, M. Nawaz; Acta Crystallographica Section E 66 (2010) o2539–; doi:10.1107/S160053681003583X

data_2227529
_publ_section_title
;
 3,4-Dimethyl-<i>N</i>-[(<i>E</i>)-3-nitrobenzylidene]-1,2-oxazol-5-amine
;
_journal_coeditor_code           HB5634
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2539
_journal_paper_doi               10.1107/S160053681003583X
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C12 H11 N3 O3'
_chemical_formula_moiety         'C12 H11 N3 O3'
_chemical_formula_sum            'C12 H11 N3 O3'
_chemical_formula_weight         245.24
_chemical_name_systematic
;
3,4-Dimethyl-<i>N</i>-[(<i>E</i>)-3-nitrobenzylidene]-1,2-oxazol-5-amine
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90
_cell_angle_beta                 94.791(9)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.602(2)
_cell_length_b                   3.9267(6)
_cell_length_c                   23.366(4)
_cell_measurement_reflns_used    846
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      25.04
_cell_measurement_theta_min      2.28
_cell_volume                     1152.2(3)
_computing_cell_refinement       'SAINT (Bruker, 2009)'
_computing_data_collection       'APEX2 (Bruker, 2009)'
_computing_data_reduction        'SAINT (Bruker, 2009)'
_computing_molecular_graphics
'ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009)'
_computing_publication_material
'WinGX (Farrugia, 1999) and PLATON (Spek, 2009)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_detector_area_resol_mean 8.20
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker Kappa APEXII CCD'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0971
_diffrn_reflns_av_sigmaI/netI    0.1294
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            8616
_diffrn_reflns_theta_full        25.04
_diffrn_reflns_theta_max         25.04
_diffrn_reflns_theta_min         2.28
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.105
_exptl_absorpt_correction_T_max  0.995
_exptl_absorpt_correction_T_min  0.992
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2005)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.414
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             512
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.157
_refine_diff_density_min         -0.186
_refine_ls_goodness_of_fit_ref   0.990
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     166
_refine_ls_number_reflns         2046
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.990
_refine_ls_R_factor_all          0.1720
_refine_ls_R_factor_gt           0.0607
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0341P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1154
_refine_ls_wR_factor_ref         0.1612
_reflns_number_gt                846
_reflns_number_total             2046
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            hb5634.cif
_cod_data_source_block           I
_cod_original_cell_volume        1152.3(3)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2227529
_cod_database_fobs_code          2227529