Five <i>N</i>'-benzylidene-<i>N</i>-methylpyrazine-2-carbohydrazides
Gomes, Ligia R.; Low, John Nicolson; Rodrigues, Ana S. M. C.; Wardell, James L.; da Lima, Camillo H.; de Souza, Marcus V. N.; Acta Crystallographica Section C 69 (2013) 549–555; doi:10.1107/S0108270113010056

data_2018999
_publ_section_title
;
 Five <i>N</i>'-benzylidene-<i>N</i>-methylpyrazine-2-carbohydrazides
;
_journal_coeditor_code           SK3484
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              549
_journal_page_last               555
_journal_paper_doi               10.1107/S0108270113010056
_journal_volume                  69
_journal_year                    2013
_chemical_formula_iupac          'C13 H11 N5 O3'
_chemical_formula_moiety         'C13 H11 N5 O3'
_chemical_formula_sum            'C13 H11 N5 O3'
_chemical_formula_weight         285.27
_chemical_name_systematic
;
<i>N</i>-Methyl-<i>N</i>'-(4-nitrobenzylidene)pyrazine-2-carbohydrazide
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 107.887(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   17.510(2)
_cell_length_b                   10.5421(11)
_cell_length_c                   14.9638(14)
_cell_measurement_reflns_used    3733
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.4
_cell_measurement_theta_min      3.1
_cell_volume                     2628.7(5)
_computing_cell_refinement       'CrystalClear-SM Expert (Rigaku, 2011)'
_computing_data_collection       'CrystalClear-SM Expert (Rigaku, 2011)'
_computing_data_reduction        'CrystalClear-SM Expert (Rigaku, 2011)'
_computing_molecular_graphics    'PLATON (Spek, 2009)'
_computing_publication_material
;
OSCAIL (McArdle <i>et al.</i>, 2004) and SHELXL97 (Sheldrick,
2008)
;
_computing_structure_refinement
;
OSCAIL (McArdle <i>et al.</i>, 2004) and SHELXL97 (Sheldrick,
2008)
;
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      120
_diffrn_detector_area_resol_mean 10.0000
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device       'Crystal goniometer'
_diffrn_measurement_device_type  'Rigaku R-AXIS conversion'
_diffrn_measurement_method       'profile data from \w scans'
_diffrn_radiation_monochromator  'Graphite monochromator'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0418
_diffrn_reflns_av_sigmaI/netI    0.0446
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            7284
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.14
_exptl_absorpt_coefficient_mu    0.107
_exptl_absorpt_correction_T_max  0.9831
_exptl_absorpt_correction_T_min  0.9564
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(CrystalClear-SM Expert; Rigaku, 2011)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.442
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1184
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.314
_refine_diff_density_min         -0.258
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.075
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     191
_refine_ls_number_reflns         3000
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.075
_refine_ls_R_factor_all          0.0696
_refine_ls_R_factor_gt           0.0604
_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^)+(0.0773P)^2^+2.8776P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1592
_refine_ls_wR_factor_ref         0.1685
_reflns_number_gt                2610
_reflns_number_total             3000
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk3484.cif
_cod_data_source_block           IIe
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2018999
_cod_database_fobs_code          2018999