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_7125264
_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         'C19 H21 N O6'
_chemical_formula_sum            'C19 H21 N O6'
_chemical_formula_weight         359.37
_space_group_crystal_system      orthorhombic
_space_group_IT_number           29
_space_group_name_Hall           'P 2c -2ac'
_space_group_name_H-M_alt        'P c a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2016-06-30
_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                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.200(3)
_cell_length_b                   12.903(3)
_cell_length_c                   14.787(3)
_cell_measurement_reflns_used    424
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      14.27
_cell_measurement_theta_min      2.55
_cell_volume                     1946.1(8)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_collection       'SAINT v8.34A (Bruker, 2013)'
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_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    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker kappa APEXII CCD Diffractometer'
_diffrn_measurement_method       '\f scans, and \w scans with \k offsets'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.2212
_diffrn_reflns_av_unetI/netI     0.3173
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            9527
_diffrn_reflns_point_group_measured_fraction_full 0.896
_diffrn_reflns_point_group_measured_fraction_max 0.882
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         27.023
_diffrn_reflns_theta_min         2.894
_diffrn_source                   'Incoatec I\mS microfocus X-ray source'
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  0.7455
_exptl_absorpt_correction_T_min  0.5312
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2014/5 (Bruker,2014) was used for absorption correction.
wR2(int) was 0.1207 before and 0.0806 after correction.
The Ratio of minimum to maximum transmission is 0.7125.
The \l/2 correction factor is 0.00150.
;
_exptl_crystal_colour            'clear colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.227
_exptl_crystal_description       plate
_exptl_crystal_F_000             760
_exptl_crystal_recrystallization_method 'ether diffusion'
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.290
_refine_diff_density_min         -0.314
_refine_diff_density_rms         0.077
_refine_ls_abs_structure_details
;
 Flack x determined using 345 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -1.1(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.921
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     239
_refine_ls_number_reflns         3750
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.921
_refine_ls_R_factor_all          0.2424
_refine_ls_R_factor_gt           0.0843
_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^)] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1451
_refine_ls_wR_factor_ref         0.2131
_reflns_Friedel_coverage         0.699
_reflns_Friedel_fraction_full    0.786
_reflns_Friedel_fraction_max     0.757
_reflns_number_gt                1386
_reflns_number_total             3750
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6cc08079k2.cif
_cod_data_source_block           pca21_a
_cod_original_cell_volume        1946.1(7)
_cod_database_code               7125264
_shelx_estimated_absorpt_t_max   0.996
_shelx_estimated_absorpt_t_min   0.991
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 N1(H1), C11(H11), C7(H7)
2.b Aromatic/amide H refined with riding coordinates:
 C15(H15), C14(H14), C17(H17), C9(H9), C10(H10), C18(H18)
2.c Idealised Me refined as rotating group:
 C12(H12A,H12B,H12C), C1(H1A,H1B,H1C), C19(H19A,H19B,H19C), C2(H2A,H2B,H2C)
;
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'