Hemiindigo - Highly Bistable Photoswitching at the Biooptical Window.
Petermayer, Christian; Thumser, Stefan; Kink, Florian; Mayer, Peter; Dube, Henry; Journal of the American Chemical Society  (2017) –; doi:10.1021/jacs.7b07531

data_4126596
_publ_section_title
;
 Hemiindigo - Highly Bistable Photoswitching at the Biooptical Window.
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_paper_doi               10.1021/jacs.7b07531
_journal_year                    2017
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C20 H22 N2 O'
_chemical_formula_sum            'C20 H22 N2 O'
_chemical_formula_weight         306.39
_chemical_name_common            cp157
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_block_code                C20H22N2O_uv447_carell
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_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.59700(10)
_cell_length_b                   8.4620(2)
_cell_length_c                   34.1983(7)
_cell_measurement_reflns_used    9982
_cell_measurement_temperature    100.(2)
_cell_measurement_theta_max      28.1723
_cell_measurement_theta_min      2.4795
_cell_volume                     1619.69(6)
_computing_cell_refinement       'SAINT V8.35A (Bruker AXS Inc., 2015)'
_computing_data_collection       'SAINT V8.35A (Bruker AXS Inc., 2015)'
_computing_data_reduction        'SAINT V8.35A (Bruker AXS Inc., 2015)'
_computing_molecular_graphics    'shelXle (C.B. Huebschle, rev 740)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'XT, VERSION 2014/4'
_diffrn_ambient_temperature      100.(2)
_diffrn_detector_area_resol_mean 7.4074
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device       'fixed-chi three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker D8 Venture TXS'
_diffrn_measurement_method       'mix of phi and omega scans'
_diffrn_radiation_monochromator  'focusing mirrors'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0299
_diffrn_reflns_av_unetI/netI     0.0240
_diffrn_reflns_Laue_measured_fraction_full 0.996
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_diffrn_reflns_limit_h_max       7
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_diffrn_reflns_number            18993
_diffrn_reflns_point_group_measured_fraction_full 0.997
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_diffrn_reflns_theta_full        25.242
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_diffrn_source                   'rotating anode (TXS)'
_diffrn_source_current           50
_diffrn_source_power             2.5
_diffrn_source_type              'Bruker TXS'
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    0.078
_exptl_absorpt_correction_T_max  0.9705
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_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2014/5 - Bruker AXS area detector scaling and absorption correction
;
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.256
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             656
_exptl_crystal_size_max          0.090
_exptl_crystal_size_mid          0.070
_exptl_crystal_size_min          0.040
_refine_diff_density_max         0.237
_refine_diff_density_min         -0.287
_refine_diff_density_rms         0.039
_refine_ls_abs_structure_details
;

Refined as a perfect inversion twin.
;
_refine_ls_abs_structure_Flack   0.5
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     211
_refine_ls_number_reflns         4019
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.066
_refine_ls_R_factor_all          0.0391
_refine_ls_R_factor_gt           0.0366
_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^)+(0.0481P)^2^+0.4329P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0934
_refine_ls_wR_factor_ref         0.0953
_reflns_Friedel_coverage         0.703
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                3818
_reflns_number_total             4019
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja7b07531_si_002.cif
_cod_data_source_block           uv447
_cod_depositor_comments
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The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Multi-Scan' changed to
'multi-scan' according to
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 
;
_cod_database_code               4126596
_shelx_estimated_absorpt_t_min   0.993
_shelx_estimated_absorpt_t_max   0.997
_shelx_res_checksum              93253
_shelx_hkl_checksum              24218