Hydrogen bonding in 1,2-diazine‒chloranilic acid (2 : 1) studied by a 14N nuclear quadrupole coupling tensor and multi-temperature X-ray diffraction
Seliger, Janez; Žagar, Veselko; Gotoh, Kazuma; Ishida, Hiroyuki; Konnai, Akiko; Amino, Daiki; Asaji, Tetsuo; Physical Chemistry Chemical Physics 11 (2009) 2281–2286; doi:10.1039/b818318j

data_7200574
_publ_section_title
;
 Hydrogen bonding in 1,2-diazine--chloranilic acid
 (2&#x2009;:&#x2009;1) studied by a 14N nuclear quadrupole coupling
 tensor and multi-temperature X-ray diffraction
;
_journal_issue                   13
_journal_name_full               'Physical Chemistry Chemical Physics'
_journal_page_first              2281
_journal_page_last               2286
_journal_paper_doi               10.1039/b818318j
_journal_volume                  11
_journal_year                    2009
_chemical_formula_moiety         'C14 H10 Cl2 N4 O4'
_chemical_formula_sum            'C14 H10 Cl2 N4 O4'
_chemical_formula_weight         369.16
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 99.515(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   3.7825(2)
_cell_length_b                   20.2466(13)
_cell_length_c                   9.6556(6)
_cell_measurement_reflns_used    17903
_cell_measurement_temperature    258(1)
_cell_measurement_theta_max      29.9
_cell_measurement_theta_min      3.0
_cell_volume                     729.28(8)
_computing_cell_refinement       PROCESS-AUTO
_computing_data_collection       'PROCESS-AUTO (Rigaku/MSC, 2004)'
_computing_data_reduction        'CrystalStructure (Rigaku/MSC, 2004)'
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_computing_publication_material  'CrystalStructure and PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      258(2)
_diffrn_detector_area_resol_mean 10.00
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Rigaku RAXIS-RAPID'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0209
_diffrn_reflns_av_sigmaI/netI    0.0097
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            22018
_diffrn_reflns_theta_full        29.95
_diffrn_reflns_theta_max         29.95
_diffrn_reflns_theta_min         3.70
_exptl_absorpt_coefficient_mu    0.475
_exptl_absorpt_correction_T_max  0.977
_exptl_absorpt_correction_T_min  0.902
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
;
Higashi, T. (1999). Program for Absorption Correction.
Rigaku Corporation, Tokyo, Japan.
;
_exptl_crystal_density_diffrn    1.681
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             376
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.413
_refine_diff_density_min         -0.160
_refine_diff_density_rms         0.050
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.087
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     116
_refine_ls_number_reflns         2127
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.087
_refine_ls_R_factor_all          0.0356
_refine_ls_R_factor_gt           0.0306
_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^)+(0.0496P)^2^+0.0976P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0830
_refine_ls_wR_factor_ref         0.0857
_reflns_number_gt                1836
_reflns_number_total             2127
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b818318j.txt
_cod_data_source_block           258K
_cod_database_code               7200574