Persistent, highly localized, and tunable [4]helicene radicals
Shaikh, Aslam C.; Moutet, Jules; Veleta, José M.; Hossain, Md Mubarak; Bloch, Jan; Astashkin, Andrei V.; Gianetti, Thomas L.; Chemical Science  (2020) –; doi:10.1039/D0SC04850J

data_1559172
_publ_section_title
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 Persistent, highly localized, and tunable [4]helicene radicals
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/D0SC04850J
_journal_year                    2020
_chemical_formula_moiety         'C31 H38 N5 O4'
_chemical_formula_sum            'C31 H38 N5 O4'
_chemical_formula_weight         544.66
_chemical_name_common            2-NO2radical
_chemical_name_systematic        2-NO2radical
_chemical_properties_physical    Air-sensitive
_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     dual
_audit_creation_date             2019-10-30
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
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2020-05-20 deposited with the CCDC.	2020-09-14 downloaded from the CCDC.
;
_cell_angle_alpha                71.977(17)
_cell_angle_beta                 84.217(17)
_cell_angle_gamma                64.762(17)
_cell_formula_units_Z            2
_cell_length_a                   10.834(7)
_cell_length_b                   11.010(7)
_cell_length_c                   13.357(9)
_cell_measurement_reflns_used    3993
_cell_measurement_temperature    100
_cell_measurement_theta_max      25.49
_cell_measurement_theta_min      2.28
_cell_volume                     1369.6(16)
_computing_cell_refinement       '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    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      100
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.979
_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_R_equivalents  0.0323
_diffrn_reflns_av_unetI/netI     0.0488
_diffrn_reflns_Laue_measured_fraction_full 0.991
_diffrn_reflns_Laue_measured_fraction_max 0.979
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            12298
_diffrn_reflns_point_group_measured_fraction_full 0.991
_diffrn_reflns_point_group_measured_fraction_max 0.979
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.545
_diffrn_reflns_theta_min         1.604
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.6277
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2014/5 (Bruker,2014/5) was used for absorption correction. wR2(int) was 0.0757 before and 0.0448 after correction. The Ratio of minimum to maximum transmission is 0.8423. The \l/2 correction factor is 0.00150.'
_exptl_crystal_colour            'metallic dark gray'
_exptl_crystal_colour_lustre     metallic
_exptl_crystal_colour_modifier   dark
_exptl_crystal_colour_primary    gray
_exptl_crystal_density_diffrn    1.321
_exptl_crystal_description       plate
_exptl_crystal_F_000             582
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: Toluene/hexanes'
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.260
_refine_diff_density_min         -0.294
_refine_diff_density_rms         0.056
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     367
_refine_ls_number_reflns         5025
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0929
_refine_ls_R_factor_gt           0.0528
_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^)+(0.0625P)^2^+1.1428P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1223
_refine_ls_wR_factor_ref         0.1487
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3329
_reflns_number_total             5025
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0sc04850j2.cif
_cod_data_source_block           2-NO2radical
_cod_database_code               1559172
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.993
_shelx_estimated_absorpt_t_min   0.957
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C00K(H00A,H00B), C00Q(H00C,H00D), C00S(H00E,H00F), C00T(H00G,H00H), C00X(H00I,
 H00J), C00Y(H00K,H00M)
2.b Aromatic/amide H refined with riding coordinates:
 C00L(H00L), C00N(H00N), C00O(H00O), C00P(H00P), C00R(H00R), C00U(H00U),
 C00V(H00V), C00W(H00W)
2.c Idealised Me refined as rotating group:
 C00Z(H00Q,H00S,H00T), C010(H01A,H01B,H01C), C011(H01D,H01E,H01F), C012(H01G,
 H01H,H01I), C013(H01J,H01K,H01L), C014(H01M,H01N,H01O)
;
_shelx_res_checksum              5166
_olex2_submission_special_instructions 'No special instructions were received'