Crystalline state photochromism of 3-furylfulgides: impact of size and bond flexibility of the non-aromatic alkylidene group
Hettiarachchi, Champika V.; Weerasekara, Roshan K.; Uekusa, Hidehiro; Acta Crystallographica Section B 71 (2015) 535–542; doi:10.1107/S2052520615015267

data_2106808
_publ_section_title
;
 Crystalline state photochromism of 3-furylfulgides: impact of size and
 bond flexibility of the non-aromatic alkylidene group
;
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              535
_journal_page_last               542
_journal_paper_doi               10.1107/S2052520615015267
_journal_volume                  71
_journal_year                    2015
_chemical_formula_moiety         'C18 H20 O4'
_chemical_formula_sum            'C18 H20 O4'
_chemical_formula_weight         300.34
_chemical_name_systematic
;
 3-furylfulgide with cyclohexylidene-4E
;
_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
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 91.355(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.6047(7)
_cell_length_b                   14.4631(10)
_cell_length_c                   11.3814(8)
_cell_measurement_reflns_used    8916
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.38
_cell_measurement_theta_min      3.08
_cell_volume                     1580.59(19)
_computing_cell_refinement       PROCESS-AUTO
_computing_data_collection       'PROCESS-AUTO (Rigaku, 1998)'
_computing_data_reduction        'TEXSAN (Rigaku, 1999)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Rigaku RAXIS-RAPID Imaging Plate'
_diffrn_measurement_method       'Oscillation Photograph'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0466
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            15155
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.386
_diffrn_reflns_theta_min         3.084
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  0.894
_exptl_absorpt_correction_T_min  0.872
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'ABSCOR (Higashi, 1995)'
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.262
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plates
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.310
_exptl_crystal_size_mid          0.168
_exptl_crystal_size_min          0.070
_refine_diff_density_max         0.179
_refine_diff_density_min         -0.181
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.041
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     202
_refine_ls_number_reflns         3582
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0966
_refine_ls_R_factor_gt           0.0419
_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^)+(0.0606P)^2^+0.0640P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1042
_refine_ls_wR_factor_ref         0.1298
_reflns_number_gt                1915
_reflns_number_total             3582
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            gw5039sup1.cif
_cod_data_source_block           4E
_cod_database_code               2106808
_cod_database_fobs_code          2106808
_shelx_estimated_absorpt_t_min   0.973
_shelx_estimated_absorpt_t_max   0.994