Remarkable substitution influence on the mechanochromism of cyanostilbene derivatives
Zhao, He; Wang, Yongtao; Harrington, Steven; Ma, Lei; Hu, Shuzhi; Wu, Xue; Tang, Huan; Xue, Mei; Wang, Yubin; RSC Adv. 6 (2016) 66477–; doi:10.1039/C6RA14707K

data_7225917
_publ_section_title
;
 Remarkable substitution influence on the mechanochromism of cyanostilbene
 derivatives
;
_journal_issue                   71
_journal_name_full               'RSC Adv.'
_journal_page_first              66477
_journal_paper_doi               10.1039/C6RA14707K
_journal_volume                  6
_journal_year                    2016
_chemical_formula_moiety         'C28 H20 N2 O'
_chemical_formula_sum            'C28 H20 N2 O'
_chemical_formula_weight         400.46
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2016-01-17
_audit_creation_method
;
Olex2 1.2
(compiled 2015.09.30 svn.r3233 for OlexSys, GUI svn.r5103)
;
_audit_update_record
;
2016-04-16 deposited with the CCDC.
2016-07-07 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 111.991(4)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   16.599(4)
_cell_length_b                   7.731(2)
_cell_length_c                   17.121(4)
_cell_measurement_reflns_used    1898
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      22.40
_cell_measurement_theta_min      2.65
_cell_volume                     2037.2(9)
_computing_cell_refinement       'SAINT v7.60A (Bruker, 2009)'
_computing_data_reduction        'SAINT v7.60A (Bruker, 2009)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296.15
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0360
_diffrn_reflns_av_unetI/netI     0.0403
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            9995
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.003
_diffrn_reflns_theta_max         25.003
_diffrn_reflns_theta_min         1.458
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.9850
_exptl_absorpt_correction_T_min  0.9834
_exptl_absorpt_correction_type   'Semi-empirical from equivalents'
_exptl_absorpt_process_details   'SADABS; Bruker, 2000'
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.306
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             840
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.19
_refine_diff_density_max         0.146
_refine_diff_density_min         -0.204
_refine_diff_density_rms         0.038
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.021
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     280
_refine_ls_number_reflns         3591
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.021
_refine_ls_R_factor_all          0.0695
_refine_ls_R_factor_gt           0.0425
_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^)+(0.0597P)^2^+0.1406P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1016
_refine_ls_wR_factor_ref         0.1188
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2450
_reflns_number_total             3591
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6ra14707k2.cif
_cod_data_source_block           a
_cod_original_cell_volume        2037.1(9)
_cod_database_code               7225917
_shelx_estimated_absorpt_t_max   0.985
_shelx_estimated_absorpt_t_min   0.983
_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 Me refined with riding coordinates:
 C1(H1A,H1B,H1C)
2.b Aromatic/amide H refined with riding coordinates:
 C3(H3), C4(H4), C6(H6), C7(H7), C9(H9), C12(H12), C13(H13), C16(H16),
 C19(H19), C20(H20), C21(H21), C22(H22), C24(H24), C25(H25), C26(H26), C27(H27),
  C28(H28)
;
_shelx_res_checksum              68605
_shelx_hkl_checksum              67731
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'