Spin Delocalization, Polarization, and London Dispersion Forces Govern the Formation of Diradical Pimers.
Peterson, Joshua P.; Ellern, Arkady; Winter, Arthur H.; Journal of the American Chemical Society  (2020) –; doi:10.1021/jacs.0c00190

data_4134333
_publ_section_title
;
 Spin Delocalization, Polarization, and London Dispersion Forces Govern
 the Formation of Diradical Pimers.
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_paper_doi               10.1021/jacs.0c00190
_journal_year                    2020
_chemical_formula_moiety         'C28 H20 N6, C7 H8'
_chemical_formula_sum            'C35 H28 N6'
_chemical_formula_weight         532.63
_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
_cell_angle_alpha                74.527(2)
_cell_angle_beta                 74.067(2)
_cell_angle_gamma                76.732(2)
_cell_formula_units_Z            1
_cell_length_a                   7.6280(3)
_cell_length_b                   10.0861(3)
_cell_length_c                   10.2848(3)
_cell_measurement_reflns_used    4123
_cell_measurement_temperature    173.(2)
_cell_measurement_theta_max      62.3846
_cell_measurement_theta_min      4.5810
_cell_volume                     722.80(4)
_computing_cell_refinement       'SAINT V8.38A (Bruker AXS Inc., 2017)'
_computing_data_collection       'APEX3 Suite (Bruker AXS Inc. , 2017)'
_computing_data_reduction        'SAINT V8.38A (Bruker AXS Inc., 2017)'
_computing_molecular_graphics    'shelXle (C.B. Huebschle, rev 833)'
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_computing_structure_solution    'XT, VERSION 2014/5'
_diffrn_ambient_temperature      173.(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.978
_diffrn_measured_fraction_theta_max 0.978
_diffrn_measurement_device_type  'Bruker D8 VENTURE diffractometer'
_diffrn_measurement_method
'\w and \f scans, narrow frame width, shutterless'
_diffrn_radiation_monochromator  'multilayer mirror'
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0336
_diffrn_reflns_av_unetI/netI     0.0311
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            9321
_diffrn_reflns_theta_full        62.38
_diffrn_reflns_theta_max         62.38
_diffrn_reflns_theta_min         4.58
_diffrn_source                   'microfocus sealed tube'
_diffrn_source_type              'sealed tube'
_exptl_absorpt_coefficient_mu    0.581
_exptl_absorpt_correction_T_max  0.75
_exptl_absorpt_correction_T_min  0.67
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;

SADABS (Spek A. L., 2015) was used for an absorption correction and scalling
of observed data
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.224
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             280
_exptl_crystal_size_max          0.190
_exptl_crystal_size_mid          0.110
_exptl_crystal_size_min          0.040
_refine_diff_density_max         0.329
_refine_diff_density_min         -0.179
_refine_diff_density_rms         0.047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     199
_refine_ls_number_reflns         2248
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.019
_refine_ls_R_factor_all          0.0514
_refine_ls_R_factor_gt           0.0467
_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^)+(0.1704P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1793
_refine_ls_wR_factor_ref         0.1893
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1987
_reflns_number_total             2248
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja0c00190_si_002.cif
_cod_data_source_block           Win035Cu
_cod_depositor_comments
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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/rss-feeds/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 
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_cod_database_code               4134333
_shelx_res_checksum              96274
_shelx_hkl_checksum              37694