Variable-temperature neutron diffraction studies of the short, strong N···O hydrogen bonds in the 1:2 co-crystal of benzene-1,2,4,5-tetracarboxylic acid and 4,4'-bipyridyl
Cowan, John A.; Howard, Judith A. K.; McIntyre, Garry J.; Lo, Samuel M.-F.; Williams, Ian D.; Acta Crystallographica Section B 59 (2003) 794–801; doi:10.1107/S0108768103024984

data_2104012
_publ_section_title
;
 Variable-temperature neutron diffraction studies of the short, strong
 N&#x00B7;&#x00B7;&#x00B7;O hydrogen bonds in the 1:2 co-crystal of
 benzene-1,2,4,5-tetracarboxylic acid and 4,4'-bipyridyl
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              794
_journal_page_last               801
_journal_paper_doi               10.1107/S0108768103024984
_journal_volume                  59
_journal_year                    2003
_chemical_formula_sum            'C30 H22 N4 O8'
_chemical_formula_weight         566.00
_chemical_name_systematic
;
 ?
;
_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   difmap
_atom_sites_solution_primary     difmap
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                64.510(10)
_cell_angle_beta                 72.030(10)
_cell_angle_gamma                76.080(10)
_cell_formula_units_Z            1
_cell_length_a                   7.5410(10)
_cell_length_b                   9.7150(10)
_cell_length_c                   10.2040(10)
_cell_measurement_temperature    200(2)
_cell_volume                     636.79(14)
_computing_cell_refinement       'LAUEGEN (Campbell)'
_computing_data_collection       'LADI Control'
_computing_data_reduction
;
INTEGRATE+ and LAUENORM (Wilkinson), (Campbell)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.495
_diffrn_measured_fraction_theta_max 0.495
_diffrn_measurement_device_type  'LADI Laue diffractometer'
_diffrn_measurement_method       'Laue method'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          neutron
_diffrn_radiation_source         'ILL high flux reactor'
_diffrn_radiation_type           neutron
_diffrn_radiation_wavelength     '1.1 to 1.9'
_diffrn_reflns_av_R_equivalents  0.1130
_diffrn_reflns_av_sigmaI/netI    0.1115
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            1961
_diffrn_reflns_theta_full        30.70
_diffrn_reflns_theta_max         30.70
_diffrn_reflns_theta_min         3.23
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.000
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.478
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       plate
_exptl_crystal_F_000             201
_exptl_crystal_size_max          1.3
_exptl_crystal_size_mid          0.6
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.706
_refine_diff_density_min         -0.746
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.276
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     289
_refine_ls_number_reflns         1961
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.276
_refine_ls_R_factor_all          0.1022
_refine_ls_R_factor_gt           0.0524
_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^)+(0.0500P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1188
_refine_ls_wR_factor_ref         0.1249
_reflns_number_gt                1192
_reflns_number_total             1961
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            bs5001.cif
_cod_data_source_block           hexladi
_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:

'_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_cell_volume        635.9(5)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               2104012