Tethered CAAC-CAAC dimers: oxidation to persistent radical cations and bridging-unit dependent reactivity/stability of the dications.
Nayak, Mithilesh Kumar; Suhr, Simon; Chrysochos, Nicolas; Rawat, Hemant; Schulzke, Carola; Chandrasekhar, Vadapalli; Sarkar, Biprajit; Jana, Anukul; Chemical communications (Cambridge, England) 57 (2021) 1210–1213; doi:10.1039/d0cc07385g

data_7127668
_publ_section_title
;
 Tethered CAAC-CAAC dimers: oxidation to persistent radical cations and
 bridging-unit dependent reactivity/stability of the dications.
;
_journal_issue                   10
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              1210
_journal_page_last               1213
_journal_paper_doi               10.1039/d0cc07385g
_journal_volume                  57
_journal_year                    2021
_chemical_formula_moiety         'C18 H32 N2'
_chemical_formula_sum            'C18 H32 N2'
_chemical_formula_weight         276.45
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2020-05-25
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2020-05-25 deposited with the CCDC.	2020-12-18 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 91.043(7)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.3706(9)
_cell_length_b                   8.1457(4)
_cell_length_c                   18.6134(11)
_cell_measurement_reflns_used    3612
_cell_measurement_temperature    240(2)
_cell_measurement_theta_max      26.1980
_cell_measurement_theta_min      3.6550
_cell_volume                     1723.72(19)
_computing_cell_refinement       'CrysAlisPro 1.171.39.29d (Rigaku OD, 2017)'
_computing_data_collection       'CrysAlisPro 1.171.39.29d (Rigaku OD, 2017)'
_computing_data_reduction        'CrysAlisPro 1.171.39.29d (Rigaku OD, 2017)'
_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      240.0
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.964
_diffrn_measurement_device_type  'XtaLAB AFC12 (RINC): Kappa single'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0628
_diffrn_reflns_av_unetI/netI     0.0537
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.964
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            12263
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.964
_diffrn_reflns_theta_full        25.027
_diffrn_reflns_theta_max         25.027
_diffrn_reflns_theta_min         2.500
_exptl_absorpt_coefficient_mu    0.062
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.39321
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.39.29d (Rigaku Oxford Diffraction, 2017)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.065
_exptl_crystal_description       block
_exptl_crystal_F_000             616
_exptl_crystal_size_max          0.19
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.228
_refine_diff_density_min         -0.304
_refine_diff_density_rms         0.050
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     219
_refine_ls_number_reflns         2958
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0859
_refine_ls_R_factor_gt           0.0750
_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^)+(0.1181P)^2^+0.6942P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2041
_refine_ls_wR_factor_ref         0.2127
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2445
_reflns_number_total             2958
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0cc07385g2.cif
_cod_data_source_block           aj1150
_cod_depositor_comments
'Adding full bibliography for 7127659--7127670.cif.'
_cod_database_code               7127668
_shelx_shelxl_version_number     2017/1
_shelx_estimated_absorpt_t_max   0.993
_shelx_estimated_absorpt_t_min   0.988
_olex2_refinement_description
;
1. Twinned data refinement
 Scales: 0.9507(14)
 0.0493(14)
2. Fixed Uiso
 At 1.2 times of:
  All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
3. Others
 Sof(C3')=Sof(H3'A)=Sof(H3'B)=Sof(C4')=Sof(H4'A)=Sof(H4'B)=1-FVAR(1)
 Sof(C3)=Sof(H3A)=Sof(H3B)=Sof(C4)=Sof(H4A)=Sof(H4B)=FVAR(1)
 Sof(C13')=Sof(H13C)=Sof(H13D)=1-FVAR(2)
 Sof(C13)=Sof(H13A)=Sof(H13B)=FVAR(2)
4.a Secondary CH2 refined with riding coordinates:
 C3(H3A,H3B), C4(H4A,H4B), C3'(H3'A,H3'B), C4'(H4'A,H4'B), C6(H6A,H6B),
 C13(H13A,H13B), C13'(H13C,H13D)
4.b Idealised Me refined as rotating group:
 C8(H8A,H8B,H8C), C9(H9A,H9B,H9C), C10(H10A,H10B,H10C), C11(H11A,H11B,H11C),
 C15(H15A,H15B,H15C), C16(H16A,H16B,H16C), C17(H17A,H17B,H17C), C18(H18A,H18B,
 H18C)
;
_shelx_res_checksum              52273
_olex2_submission_special_instructions 'No special instructions were received'