Hydrogen Bonding and Electron Donor−Acceptor (EDA) Interactions Controlling the Crystal Packing of Picric Acid and Its Adducts with Nitrogen Bases. Their Rationalization in Terms of the pKaEqualization and Electron-Pair Saturation Concepts
Bertolasi, Valerio; Gilli, Paola; Gilli, Gastone; Crystal Growth & Design 11 (2011) 2724–; doi:10.1021/cg101007a

data_4500129
_publ_section_title
;
 Hydrogen Bonding and Electron Donor&#x2212;Acceptor (EDA) Interactions
 Controlling the Crystal Packing of Picric Acid and Its Adducts with
 Nitrogen Bases. Their Rationalization in Terms of the pKaEqualization and
 Electron-Pair Saturation Concepts
;
_journal_issue                   7
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              2724
_journal_paper_doi               10.1021/cg101007a
_journal_volume                  11
_journal_year                    2011
_chemical_formula_moiety         'C6 H2 N3 O7, C6 H8 N O'
_chemical_formula_sum            'C12 H10 N4 O8'
_chemical_formula_weight         338.24
_chemical_name_systematic
;
2-hydroxy-6-methylpyridinium picrate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 96.9655(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.3174(2)
_cell_length_b                   15.2404(4)
_cell_length_c                   12.6802(4)
_cell_measurement_reflns_used    14432
_cell_measurement_temperature    295
_cell_measurement_theta_max      26.50
_cell_measurement_theta_min      3.11
_cell_volume                     1403.66(7)
_computing_cell_refinement       'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1998)'
_computing_data_reduction        'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'ORTEPIII (Burnett & Johnson, 1996)'
_computing_publication_material
'SHELXL-97 (Sheldrick, 1997), PARST (Nardelli, 1995)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Altomare et al., 1999)'
_diffrn_ambient_temperature      295
_diffrn_measured_fraction_theta_full 0.963
_diffrn_measured_fraction_theta_max 0.963
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       '\f scans 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  0.0580
_diffrn_reflns_av_sigmaI/netI    0.0427
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            14432
_diffrn_reflns_theta_full        26.50
_diffrn_reflns_theta_max         26.50
_diffrn_reflns_theta_min         3.11
_exptl_absorpt_coefficient_mu    0.138
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.601
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             696
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.500
_refine_diff_density_min         -0.216
_refine_diff_density_rms         0.075
_refine_ls_extinction_coef       0.089(19)
_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   1.106
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     258
_refine_ls_number_reflns         2797
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.106
_refine_ls_R_factor_all          0.0967
_refine_ls_R_factor_gt           0.0840
_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^)+(0.1428P)^2^+0.7348P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2300
_refine_ls_wR_factor_ref         0.2433
_reflns_number_gt                2245
_reflns_number_total             2797
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            cg101007a_si_002.cif
_cod_data_source_block           (12)
_cod_original_sg_symbol_H-M      'P 21/a'
_cod_database_code               4500129