Conformational dimorphism of the spiropyran 1',3',3'-trimethylspiro[2<i>H</i>-1-benzopyran-2,2'-indoline]-6-carbaldehyde)
Zouev, I.; Kaftory, M.; Acta Crystallographica Section C 64 (2008) o372–o375; doi:10.1107/S0108270108016430

data_2016697
_publ_section_title
;Conformational dimorphism of the spiropyran
 1',3',3'-trimethylspiro[2<i>H</i>-1-benzopyran-2,2'-indoline]-6-carbaldehyde)
;
_journal_coeditor_code           SQ3147
_journal_issue                   7
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o372
_journal_page_last               o375
_journal_paper_doi               10.1107/S0108270108016430
_journal_volume                  64
_journal_year                    2008
_chemical_formula_iupac          'C20 H19 N O2'
_chemical_formula_moiety         'C20 H19 N O2'
_chemical_formula_sum            'C20 H19 N O2'
_chemical_formula_weight         305.36
_chemical_name_common
;
1',3',3'-trimethyl-1',3'-dihydrospiropyran-6-carbaldehyde
;
_chemical_name_systematic
;
1',3',3'-trimethylspiro[2'H-1-benzopyran-2,2'-indoline]-6-carbaldehyde
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 103.57(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            16
_cell_length_a                   21.447(4)
_cell_length_b                   11.226(2)
_cell_length_c                   28.221(6)
_cell_measurement_reflns_used    5256
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.05
_cell_measurement_theta_min      1.48
_cell_volume                     6605(2)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 2000)'
_computing_data_reduction        'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'Please give details'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution
;
SHELXS97 (Sheldrick, 2008) and MAXUS (Mackay <i>et al.</i>,
1998)
;
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 95
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       '\f and \w'
_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  0.0706
_diffrn_reflns_av_sigmaI/netI    0.0926
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -36
_diffrn_reflns_number            15238
_diffrn_reflns_theta_full        27.05
_diffrn_reflns_theta_max         27.05
_diffrn_reflns_theta_min         1.48
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_type   none
_exptl_absorpt_process_details   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.228
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             2592
_exptl_crystal_size_max          0.05
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.240
_refine_diff_density_min         -0.201
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.890
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     421
_refine_ls_number_reflns         7218
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.890
_refine_ls_R_factor_all          0.1353
_refine_ls_R_factor_gt           0.0536
_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^)+(0.0890P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1360
_refine_ls_wR_factor_ref         0.1690
_reflns_number_gt                3291
_reflns_number_total             7218
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            sq3147.cif
_cod_data_source_block           I_C2c
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2016697
_cod_database_fobs_code          2016697