Spontaneous proton transfer in a series of amphoteric molecules under hydrostatic pressure
Yu, Binhong; Wang, Yi; Wang, Lingrui; Tan, Xiao; Zhang, Yumo; Wang, Kai; Li, Minjie; Zou, Bo; Zhang, Sean Xiao-An; Physical Chemistry Chemical Physics  (2019) –; doi:10.1039/C9CP02445J

data_7233189
_publ_section_title
;
 Spontaneous proton transfer in a series of amphoteric molecules under
 hydrostatic pressure
;
_journal_name_full               'Physical Chemistry Chemical Physics'
_journal_paper_doi               10.1039/C9CP02445J
_journal_year                    2019
_chemical_formula_moiety         'C19 H18 N2 O3'
_chemical_formula_sum            'C19 H18 N2 O3'
_chemical_formula_weight         322.35
_space_group_crystal_system      orthorhombic
_space_group_IT_number           56
_space_group_name_Hall           '-P 2ab 2ac'
_space_group_name_H-M_alt        'P c c n'
_symmetry_space_group_name_Hall  '-P 2ab 2ac'
_symmetry_space_group_name_H-M   'P c c n'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2018-10-13
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2018-10-15 deposited with the CCDC.    2019-07-17 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   17.361(4)
_cell_length_b                   25.237(5)
_cell_length_c                   7.5371(15)
_cell_measurement_reflns_used    16398
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.53
_cell_measurement_theta_min      3.055
_cell_volume                     3302.3(12)
_computing_cell_refinement       'CrysAlisPro 1.171.39.32a (Rigaku OD, 2017)'
_computing_data_collection       'CrysAlisPro 1.171.39.32a (Rigaku OD, 2017)'
_computing_data_reduction        'CrysAlisPro 1.171.39.32a (Rigaku OD, 2017)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0692
_diffrn_reflns_av_unetI/netI     0.0401
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       32
_diffrn_reflns_limit_k_min       -32
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            28663
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.479
_diffrn_reflns_theta_min         3.055
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.297
_exptl_crystal_description       block
_exptl_crystal_F_000             1360
_exptl_crystal_size_max          0.05
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.136
_refine_diff_density_min         -0.180
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     220
_refine_ls_number_reflns         3766
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0907
_refine_ls_R_factor_gt           0.0523
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0572P)^2^+0.4025P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1138
_refine_ls_wR_factor_ref         0.1303
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2384
_reflns_number_total             3766
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9cp02445j3.cif
_cod_data_source_block           test
_cod_original_cell_volume        3302.3(11)
_cod_database_code               7233189
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.997
_shelx_estimated_absorpt_t_min   0.996
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C4(H4), C5(H5), C6(H6), C7(H7), C9(H9), C10(H10), C13(H13), C14(H14), C16(H16)
2.b Idealised Me refined as rotating group:
 C17(H17A,H17B,H17C), C18(H18A,H18B,H18C), C19(H19A,H19B,H19C)
;
_shelx_res_checksum              3351
_olex2_submission_special_instructions 'No special instructions were received'