The balance between closed and open forms of spiropyrans in the solid state
Aakeröy, Christer B.; Hurley, Evan P.; Desper, John; Natali, Manuel; Douglawi, Antoin; Giordani, Silvia; CrystEngComm 12 (2010) 1027–; doi:10.1039/b914566d

data_7211780
_publ_section_title
;
 The balance between closed and open forms of spiropyrans in the solid
 state
;
_journal_issue                   4
_journal_name_full               CrystEngComm
_journal_page_first              1027
_journal_paper_doi               10.1039/b914566d
_journal_volume                  12
_journal_year                    2010
_chemical_formula_moiety         'C24 H26 N2 O5'
_chemical_formula_sum            'C24 H26 N2 O5'
_chemical_formula_weight         422.47
_chemical_name_systematic
;
EH-01-64-02 (ethylpropion-3-yl) nitro- spiropyran
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 98.508(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            16
_cell_length_a                   23.033(3)
_cell_length_b                   14.036(2)
_cell_length_c                   27.135(4)
_cell_measurement_reflns_used    7120
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      25.69
_cell_measurement_theta_min      2.90
_cell_volume                     8676(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.976
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.1441
_diffrn_reflns_av_sigmaI/netI    0.1629
_diffrn_reflns_limit_h_max       31
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -37
_diffrn_reflns_number            87340
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         29.52
_diffrn_reflns_theta_min         2.74
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.294
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             3584
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.326
_refine_diff_density_min         -0.331
_refine_diff_density_rms         0.080
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.097
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1129
_refine_ls_number_reflns         23631
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.097
_refine_ls_R_factor_all          0.2143
_refine_ls_R_factor_gt           0.0849
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1995
_refine_ls_wR_factor_ref         0.2481
_reflns_number_gt                9797
_reflns_number_total             23631
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b914566d.txt
_cod_data_source_block           2
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7211780