Cooling-rate dependent single-crystal-to-single-crystal phase transition in an organic co-crystal
Crawford, Adam W.; Groeneman , Ryan; Unruh, Daniel K.; Hutchins, Kristin M.; Chemical Communications  (2019) –; doi:10.1039/C9CC00836E

data_7123021
_publ_section_title
;
 Cooling-rate dependent single-crystal-to-single-crystal phase transition
 in an organic co-crystal
;
_journal_name_full               'Chemical Communications'
_journal_paper_doi               10.1039/C9CC00836E
_journal_year                    2019
_chemical_formula_sum            'C18 H12 Br4 N2'
_chemical_formula_weight         575.94
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   difmap
_audit_creation_date             2018-10-31T15:20:17-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_audit_update_record
;
2019-01-09 deposited with the CCDC.    2019-02-21 downloaded from the CCDC.
;
_cell_angle_alpha                102.795(2)
_cell_angle_beta                 93.323(2)
_cell_angle_gamma                94.316(2)
_cell_formula_units_Z            2
_cell_length_a                   3.9924(2)
_cell_length_b                   13.5015(6)
_cell_length_c                   17.3091(8)
_cell_measurement_reflns_used    4393
_cell_measurement_temperature    249(2)
_cell_measurement_theta_max      26.81
_cell_measurement_theta_min      2.42
_cell_volume                     904.59(7)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      249(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f 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  0.0335
_diffrn_reflns_av_unetI/netI     0.0349
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            14191
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.561
_diffrn_reflns_theta_min         1.553
_exptl_absorpt_coefficient_mu    8.9
_exptl_absorpt_correction_T_max  0.8621
_exptl_absorpt_correction_T_min  0.5748
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.114
_exptl_crystal_description       rod
_exptl_crystal_F_000             548
_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent'
_exptl_crystal_size_max          0.468
_exptl_crystal_size_mid          0.202
_exptl_crystal_size_min          0.177
_refine_diff_density_max         0.327
_refine_diff_density_min         -0.453
_refine_diff_density_rms         0.074
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.041
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         4155
_refine_ls_number_restraints     244
_refine_ls_restrained_S_all      1.012
_refine_ls_R_factor_all          0.0489
_refine_ls_R_factor_gt           0.0275
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0179P)^2^+0.2285P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0523
_refine_ls_wR_factor_ref         0.0581
_reflns_Friedel_coverage         0
_reflns_number_gt                3022
_reflns_number_total             4155
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9cc00836e2.cif
_cod_data_source_block           TBrB_BPE_250K
_cod_database_code               7123021
_shelx_estimated_absorpt_t_min   0.103
_shelx_estimated_absorpt_t_max   0.302
_shelx_res_checksum              26512