<i>N</i>,<i>N</i>'-Bis(3-pyridylmethyl)benzene-1,4-dicarboxamide dihydrate
Ge, Chun-Hua; Kou, Hui-Zhong; Wang, Ru-Ji; Jiang, Yun-Bo; Cui, Ai-Li; Acta Crystallographica Section E 61 (2005) o2024–o2026; doi:10.1107/S1600536805017046

data_2206263
_publ_section_title
;
 <i>N</i>,<i>N</i>'-Bis(3-pyridylmethyl)benzene-1,4-dicarboxamide
 dihydrate
;
_journal_issue                   7
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2024
_journal_page_last               o2026
_journal_paper_doi               10.1107/S1600536805017046
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C20 H18 N4 O2, 2H2 O'
_chemical_formula_moiety         'C20 H18 N4 O2, 2H2 O'
_chemical_formula_sum            'C20 H22 N4 O4'
_chemical_formula_weight         382.42
_chemical_name_systematic
;
N,N'-Bis(3-pyridylmethyl)benzene-1,4-dicarboxamide dihydrate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 108.441(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.3871(7)
_cell_length_b                   13.8981(16)
_cell_length_c                   9.8971(12)
_cell_measurement_reflns_used    49
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      17.87
_cell_measurement_theta_min      2.93
_cell_volume                     963.93(19)
_computing_cell_refinement       XSCANS
_computing_data_collection       'XSCANS (Siemens, 1996)'
_computing_data_reduction        'SHELXTL (Siemens, 1996)'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker P4'
_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  0.0216
_diffrn_reflns_av_sigmaI/netI    0.0387
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -1
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            2294
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.62
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.973
_exptl_absorpt_correction_T_min  0.972
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(North <i>et al.</i>, 1968)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.318
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             404
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.136
_refine_diff_density_min         -0.152
_refine_ls_extinction_coef       0.031(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.092
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     140
_refine_ls_number_reflns         1694
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.092
_refine_ls_R_factor_all          0.0655
_refine_ls_R_factor_gt           0.0392
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0524P)^2^+0.1416P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0993
_refine_ls_wR_factor_ref         0.1291
_reflns_number_gt                1125
_reflns_number_total             1694
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            rn6050.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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_cell_volume        963.92(19)
_cod_original_sg_symbol_Hall     -P2yn
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2206263
_cod_database_fobs_code          2206263