2'-(4-Dimethylaminobenzylidene)pyrazine-2-carbohydrazide
Xue-Fang Shi; Cui-Cui Yuan; Acta Crystallographica Section E 62 (2006) o3290–o3291; doi:10.1107/S1600536806026274

data_2209756
_publ_section_title
;
 2'-(4-Dimethylaminobenzylidene)pyrazine-2-carbohydrazide
;
_journal_coeditor_code           BT2110
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o3290
_journal_page_last               o3291
_journal_paper_doi               10.1107/S1600536806026274
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C14 H15 N5 O'
_chemical_formula_moiety         'C14 H15 N5 O'
_chemical_formula_sum            'C14 H15 N5 O'
_chemical_formula_weight         269.31
_chemical_melting_point          527.0(10)
_chemical_name_systematic
;
Pyrazine-2-carboxylic acid (4-dimethylaminobenzylidene)hydrazide
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                92.547(6)
_cell_angle_beta                 96.063(6)
_cell_angle_gamma                101.286(6)
_cell_formula_units_Z            2
_cell_length_a                   6.049(2)
_cell_length_b                   10.142(4)
_cell_length_c                   11.047(4)
_cell_measurement_reflns_used    1050
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.46
_cell_measurement_theta_min      2.68
_cell_volume                     659.4(4)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 1997)'
_computing_data_reduction        'SAINT (Bruker, 1997)'
_computing_molecular_graphics    'SHELXTL (Bruker, 1997)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_diffrn_measurement_method       '\f and \w scans'
_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  0.0324
_diffrn_reflns_av_sigmaI/netI    0.0529
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            3389
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         1.86
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  0.9855
_exptl_absorpt_correction_T_min  0.9802
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.356
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             284
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.210
_refine_diff_density_min         -0.139
_refine_ls_extinction_coef       0.014(5)
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.001
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     184
_refine_ls_number_reflns         2318
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.001
_refine_ls_R_factor_all          0.0811
_refine_ls_R_factor_gt           0.0456
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0693P)^2^+0.0644P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1106
_refine_ls_wR_factor_ref         0.1334
_reflns_number_gt                1457
_reflns_number_total             2318
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bt2110.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_chemical_melting_point' value '526--528K' was changed to
'527.0(10)' - the average value was taken and precision was
estimated.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

The following automatic conversions were performed:

'_chemical_melting_point' value '526--528K' was changed to
'527.0(10)' - the average value was taken and precision was
estimated.

'_symmetry_cell_setting' value 'Triclinic' changed to
'triclinic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               2209756
_cod_database_fobs_code          2209756