Solid-state photochromism and thermochromism of N-salicylidene pyrene derivatives
Safin, Damir A.; Bolte, Michael; Garcia, Yann; CrystEngComm 16 (2014) 8786–; doi:10.1039/C4CE01325E

data_7217669
_publ_section_title
;
 Solid-state photochromism and thermochromism of N-salicylidene pyrene
 derivatives
;
_journal_issue                   37
_journal_name_full               CrystEngComm
_journal_page_first              8786
_journal_paper_doi               10.1039/C4CE01325E
_journal_volume                  16
_journal_year                    2014
_chemical_formula_moiety         'C23 H13 Br2 N O'
_chemical_formula_sum            'C23 H13 Br2 N O'
_chemical_formula_weight         479.16
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   24.1672(15)
_cell_length_b                   4.0091(2)
_cell_length_c                   17.5905(12)
_cell_measurement_reflns_used    19768
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      26.2
_cell_measurement_theta_min      2.3
_cell_volume                     1704.32(18)
_computing_cell_refinement       'X-Area (Stoe & Cie, 2001)'
_computing_data_collection       'X-Area (Stoe & Cie, 2001)'
_computing_data_reduction        'X-Area (Stoe & Cie, 2001)'
_computing_molecular_graphics    'XP in SHELXTL-Plus (Sheldrick, 2008)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008) '
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008) '
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'STOE IPDS II two-circle-diffractometer'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  'Genix 3D multilayer optics'
_diffrn_radiation_source         'Genix 3D I\mS microfocus X-ray source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0512
_diffrn_reflns_av_sigmaI/netI    0.0617
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -29
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            17993
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.63
_diffrn_reflns_theta_min         2.32
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    4.770
_exptl_absorpt_correction_T_max  0.6470
_exptl_absorpt_correction_T_min  0.2127
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'X-Area (Stoe & Cie, 2001)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.867
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             944
_exptl_crystal_size_max          0.47
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.505
_refine_diff_density_min         -0.449
_refine_diff_density_rms         0.078
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.002(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     248
_refine_ls_number_reflns         3182
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0390
_refine_ls_R_factor_gt           0.0348
_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^)+(0.0358P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0737
_refine_ls_wR_factor_ref         0.0752
_reflns_number_gt                2974
_reflns_number_total             3182
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c4ce01325e2.cif
_cod_data_source_block           6
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

 Adding full bibliography for 7217666--7217670.cif.
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_cod_database_code               7217669