Photochromic switching behaviour of donor-acceptor Stenhouse adducts in organic solvents.
Mallo, Neil; Brown, Patrick T.; Iranmanesh, Hasti; MacDonald, Thomas S. C.; Teusner, Matthew J.; Harper, Jason B.; Ball, Graham E.; Beves, Jonathon E.; Chemical communications (Cambridge, England) 52 (2016) 13576–13579; doi:10.1039/c6cc08079k

data_7125266
_publ_section_title
;
 Photochromic switching behaviour of donor-acceptor Stenhouse adducts in
 organic solvents.
;
_journal_issue                   93
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              13576
_journal_page_last               13579
_journal_paper_doi               10.1039/c6cc08079k
_journal_volume                  52
_journal_year                    2016
_chemical_formula_moiety         'C18 H18 F N O5'
_chemical_formula_sum            'C18 H18 F N O5'
_chemical_formula_weight         347.33
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2016-07-29
_audit_creation_method
;
Olex2 1.2
(compiled 2016.02.16 svn.r3265 for OlexSys, GUI svn.r5155)
;
_audit_update_record
;
2016-08-22 deposited with the CCDC.
2016-10-26 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 113.90(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   18.990(4)
_cell_length_b                   5.4180(11)
_cell_length_c                   17.320(4)
_cell_measurement_reflns_used    3558
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.099
_cell_measurement_theta_min      1.173
_cell_volume                     1629.2(7)
_computing_cell_refinement       Shelxl-2014
_computing_data_collection       BluIce
_computing_data_reduction        XDS
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'ADSC Quantum 315r'
_diffrn_measurement_method       'Phi Scan'
_diffrn_radiation_monochromator  'Silicon Double Crystal'
_diffrn_radiation_type           Synchrotron
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0469
_diffrn_reflns_av_unetI/netI     0.0258
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.994
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            23383
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.994
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         27.099
_diffrn_reflns_theta_min         1.173
_diffrn_source                   'MX2 Beamline Australian Synchrotron'
_exptl_absorpt_coefficient_mu    0.111
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.416
_exptl_crystal_description       needle
_exptl_crystal_F_000             728
_exptl_crystal_recrystallization_method 'ether diffusion'
_exptl_crystal_size_max          0.03
_exptl_crystal_size_mid          0.01
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.353
_refine_diff_density_min         -0.277
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     229
_refine_ls_number_reflns         3558
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.0491
_refine_ls_R_factor_gt           0.0432
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0631P)^2^+0.7376P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1098
_refine_ls_wR_factor_ref         0.1140
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3124
_reflns_number_total             3558
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6cc08079k2.cif
_cod_data_source_block           p21c
_cod_database_code               7125266
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C6(H6), C7(H7), C11(H11)
2.b Aromatic/amide H refined with riding coordinates:
 C9(H9), C10(H10), C14(H14), C15(H15), C17(H17), C18(H18)
2.c Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C), C2(H2A,H2B,H2C), C12(H12A,H12B,H12C)
;
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'