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_7211781
_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         'C25 H28 N2 O6'
_chemical_formula_sum            'C25 H28 N2 O6'
_chemical_formula_weight         452.49
_chemical_name_systematic
;
EH-01-65-10 (ethylpropion-3-yl) methoxy nitro- spiropyran
;
_space_group_IT_number           9
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 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                 103.863(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.1881(13)
_cell_length_b                   12.6063(10)
_cell_length_c                   12.1356(10)
_cell_measurement_reflns_used    4488
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      31.30
_cell_measurement_theta_min      2.52
_cell_volume                     2255.9(3)
_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 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0283
_diffrn_reflns_av_sigmaI/netI    0.0324
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            11726
_diffrn_reflns_theta_full        31.50
_diffrn_reflns_theta_max         31.50
_diffrn_reflns_theta_min         2.13
_exptl_absorpt_coefficient_mu    0.096
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.332
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             960
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.354
_refine_diff_density_min         -0.206
_refine_diff_density_rms         0.051
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.017
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     302
_refine_ls_number_reflns         3756
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.016
_refine_ls_R_factor_all          0.0474
_refine_ls_R_factor_gt           0.0406
_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^)+(0.0750P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1022
_refine_ls_wR_factor_ref         0.1082
_reflns_number_gt                3361
_reflns_number_total             3756
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b914566d.txt
_cod_data_source_block           3
_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      Cc
_cod_database_code               7211781