Synthesis, photophysical and mechanochromic properties of novel 2,3,4,6-tetraaryl-4H-pyran derivatives
Xie, Yufeng; Wang, Zhiqiang; Liu, Xiaoqing; Liu, Miaochang; Lei, Yunxiang; Zhou, Yun-Bing; Gao, Wenxia; Huang, Xiaobo; Wu, Huayue; CrystEngComm  (2020) –; doi:10.1039/D0CE01021A

data_7241106
_publ_section_title
;
 Synthesis, photophysical and mechanochromic properties of novel
 2,3,4,6-tetraaryl-4H-pyran derivatives
;
_journal_name_full               CrystEngComm
_journal_paper_doi               10.1039/D0CE01021A
_journal_year                    2020
_chemical_formula_sum            'C26 H16 Br N O2'
_chemical_formula_weight         454.31
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
_audit_update_record
;
2020-07-14 deposited with the CCDC.	2020-08-24 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 100.2540(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.6941(3)
_cell_length_b                   18.5267(5)
_cell_length_c                   11.8970(3)
_cell_measurement_reflns_used    7725
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      50.855
_cell_measurement_theta_min      4.803
_cell_volume                     2102.57(10)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0346
_diffrn_reflns_av_unetI/netI     0.0282
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            22758
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.998
_diffrn_reflns_theta_min         2.734
_exptl_absorpt_coefficient_mu    1.977
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.4874
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.435
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             920
_exptl_crystal_size_max          0.170
_exptl_crystal_size_mid          0.150
_exptl_crystal_size_min          0.120
_refine_diff_density_max         0.270
_refine_diff_density_min         -0.473
_refine_diff_density_rms         0.040
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         4116
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.0525
_refine_ls_R_factor_gt           0.0346
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0376P)^2^+0.8706P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0818
_refine_ls_wR_factor_ref         0.0907
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3161
_reflns_number_total             4116
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0ce01021a2.cif
_cod_data_source_block           mo_dd19291_0m
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7241106
_shelx_estimated_absorpt_t_min   0.730
_shelx_estimated_absorpt_t_max   0.797
_shelxl_version_number           2013-4
_shelx_res_checksum              49056