Tuning Proton Disorder in 3,5-Dinitrobenzoic Acid Dimers: the Effect of Local Environment
Jones, Andrew O. F.; Blagden, Nicholas; McIntyre, Garry J.; Parkin, Andrew; Seaton, Colin C.; Thomas, Lynne H.; Wilson, Chick C.; Crystal Growth & Design 13 (2013) 497–; doi:10.1021/cg300906j

data_4510614
_publ_section_title
;
 Tuning Proton Disorder in 3,5-Dinitrobenzoic Acid Dimers: the Effect of
 Local Environment
;
_journal_issue                   2
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              497
_journal_paper_doi               10.1021/cg300906j
_journal_volume                  13
_journal_year                    2013
_chemical_formula_sum            'C7 H4 N2 O6'
_chemical_formula_weight         212.00
_chemical_name_systematic
;
 3,5-dinitrobenzoic acid
;
_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   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2012-05-08 # Formatted by publCIF
;
_cell_angle_alpha                90.00
_cell_angle_beta                 109.750(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   20.080(5)
_cell_length_b                   8.700(5)
_cell_length_c                   9.600(5)
_cell_measurement_reflns_used    250
_cell_measurement_temperature    20
_cell_volume                     1578.4(13)
_computing_cell_refinement       'lauegen (CCP4)'
_computing_data_collection       'VIVALDI (MAATEL)'
_computing_data_reduction        'argonne_boxes, laue4 (Piltz, 2011)'
_computing_molecular_graphics    'Mercury (McRae, 2006)'
_computing_publication_material  'WINGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      20
_diffrn_detector_area_resol_mean 0.7
_diffrn_measurement_device_type  VIVALDI
_diffrn_measurement_method       'Laue patterns at 10 orientations'
_diffrn_radiation_monochromator  none
_diffrn_radiation_source         'ILL reactor source, thermal guide'
_diffrn_radiation_type           neutron
_diffrn_radiation_wavelength     0.80-5.20
_diffrn_reflns_av_R_equivalents  0.0934
_diffrn_reflns_av_sigmaI/netI    0.0692
_diffrn_reflns_limit_h_max       37
_diffrn_reflns_limit_h_min       -37
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            16009
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    0.000
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.784
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             68
_exptl_crystal_size_max          2.0
_exptl_crystal_size_mid          1.8
_exptl_crystal_size_min          0.8
_refine_diff_density_max         0.145
_refine_diff_density_min         -0.137
_refine_diff_density_rms         0.030
_refine_ls_extinction_coef       2.77(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     173
_refine_ls_number_reflns         3248
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0705
_refine_ls_R_factor_gt           0.0448
_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^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1266
_refine_ls_wR_factor_ref         0.1387
_reflns_number_gt                2631
_reflns_number_total             3248
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            35-dnba_C2c_20K_neutron_CIF.cif
_cod_data_source_block           dnba_20
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               4510614