1,3-Bis(pyridineylidene)isoindoline: an isoindoline chelate with a stretched electronic structure.
Gaire, Sanjay; Schrage, Briana R.; Nemykin, Victor N.; Ziegler, Christopher J.; Dalton transactions (Cambridge, England : 2003) 50 (2021) 826–829; doi:10.1039/d0dt04347h

data_7706204
_publ_section_title
;
 1,3-Bis(pyridineylidene)isoindoline: an isoindoline chelate with a
 stretched electronic structure.
;
_journal_issue                   3
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              826
_journal_page_last               829
_journal_paper_doi               10.1039/d0dt04347h
_journal_volume                  50
_journal_year                    2021
_chemical_formula_sum            'C25 H20 N6 O'
_chemical_formula_weight         420.47
_space_group_crystal_system      tetragonal
_space_group_IT_number           76
_space_group_name_Hall           'P 4w'
_space_group_name_H-M_alt        'P 41'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2016/6
_audit_update_record
;
2020-11-11 deposited with the CCDC.	2020-12-23 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   12.557(3)
_cell_length_b                   12.557
_cell_length_c                   25.933(6)
_cell_measurement_reflns_used    5839
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      22.96
_cell_measurement_theta_min      2.30
_cell_volume                     4089.1(14)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_unetI/netI     0.1877
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            5255
_diffrn_reflns_point_group_measured_fraction_full 0.512
_diffrn_reflns_point_group_measured_fraction_max 0.507
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.457
_diffrn_reflns_theta_min         1.622
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.3464
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'twinabs 2008/2'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.366
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1760
_exptl_crystal_size_max          0.242
_exptl_crystal_size_mid          0.158
_exptl_crystal_size_min          0.110
_refine_diff_density_max         0.783
_refine_diff_density_min         -0.517
_refine_diff_density_rms         0.101
_refine_ls_abs_structure_details
; 
No quotients, so Flack parameter determined by classical intensity fit 
;
_refine_ls_abs_structure_Flack   0(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     582
_refine_ls_number_reflns         5255
_refine_ls_number_restraints     67
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.2387
_refine_ls_R_factor_gt           0.1284
_refine_ls_shift/su_max          0.036
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1472P)^2^+13.2201P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2852
_refine_ls_wR_factor_ref         0.3539
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    0.000
_reflns_Friedel_fraction_max     0.000
_reflns_number_gt                2621
_reflns_number_total             5255
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0dt04347h2.cif
_cod_data_source_block           1
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_crystal_density_meas' value 'not measured' was
changed to '?' -- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 

 Adding full bibliography for 7706204--7706207.cif.
;
_cod_original_cell_volume        4089.2(19)
_cod_database_code               7706204
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_min   0.979
_shelx_estimated_absorpt_t_max   0.990
_shelx_res_checksum              45328