Contrasting Photochromic and Acidochromic Behaviors of Pyridyl- and Pyrimidylethynylated Mono- and Bis-Benzopyrans.
Mukhopadhyay, Arindam; Jindal, Swati; Maka, Vijay Kumar; Moorthy, Jarugu Narasimha; ACS omega 6 (2021) 21113–21124; doi:10.1021/acsomega.1c02948

data_4519005
_publ_section_title
;
 Contrasting Photochromic and Acidochromic Behaviors of Pyridyl- and
 Pyrimidylethynylated Mono- and Bis-Benzopyrans.
;
_journal_issue                   32
_journal_name_full               'ACS omega'
_journal_page_first              21113
_journal_page_last               21124
_journal_paper_doi               10.1021/acsomega.1c02948
_journal_volume                  6
_journal_year                    2021
_chemical_formula_moiety         'C48 H30 N4 O2'
_chemical_formula_sum            'C48 H30 N4 O2'
_chemical_formula_weight         694.76
_chemical_name_common            Pm-BBP
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/5
_cell_angle_alpha                92.1060(10)
_cell_angle_beta                 102.8310(10)
_cell_angle_gamma                112.6960(10)
_cell_formula_units_Z            2
_cell_length_a                   10.2460(5)
_cell_length_b                   12.0419(7)
_cell_length_c                   15.9309(8)
_cell_measurement_reflns_used    5988
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.317
_cell_measurement_theta_min      2.123
_cell_volume                     1751.64(16)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Ortep for Windows (Farrugia, 2012)'
_computing_publication_material  'WinGX publication routines (Farrugia, 2012)'
_computing_structure_refinement  'SHELXL-2014/5 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXL-2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'Bruker APEX-II CCD detector'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0333
_diffrn_reflns_av_unetI/netI     0.0598
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.982
_diffrn_reflns_limit_h_max       13
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_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            15202
_diffrn_reflns_point_group_measured_fraction_full 0.994
_diffrn_reflns_point_group_measured_fraction_max 0.982
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.317
_diffrn_reflns_theta_min         2.123
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.990
_exptl_absorpt_correction_T_min  0.983
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.317
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cuboidal
_exptl_crystal_F_000             724
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.594
_refine_diff_density_min         -0.378
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     487
_refine_ls_number_reflns         8570
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.0945
_refine_ls_R_factor_gt           0.0591
_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^)+(0.0655P)^2^+1.0766P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1362
_refine_ls_wR_factor_ref         0.1553
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5988
_reflns_number_total             8570
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ao1c02948_si_003.cif
_cod_data_source_block           Pm-BBP
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_absorpt_correction_type' value 'Multi-scan' was
changed to 'multi-scan' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 
;
_cod_original_cell_volume        1751.63(16)
_cod_database_code               4519005
_shelxl_version_number           2014/5