Carbene-derived α-acyl formamidinium cations: organic molecules with readily tunable multiple redox processes.
Deardorff, Cassie L.; Eric Sikma, R.; Rhodes, Christopher P.; Hudnall, Todd W.; Chemical communications (Cambridge, England) 52 (2016) 9024–9027; doi:10.1039/c5cc06322a

data_7124585
_publ_section_title
;
 Carbene-derived \a-acyl formamidinium cations: organic molecules with
 readily tunable multiple redox processes.
;
_journal_issue                   58
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              9024
_journal_page_last               9027
_journal_paper_doi               10.1039/c5cc06322a
_journal_volume                  52
_journal_year                    2016
_chemical_formula_moiety         {(C24H28N2O2)-(COC6H5)}
_chemical_formula_sum            'C31 H33 N2 O3'
_chemical_formula_weight         481.59
_chemical_name_common            'DAC-COPh Radical'
_chemical_properties_physical    'Air-sensitive, Moisture-sensitive'
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2014-09-18 deposited with the CCDC.
2015-09-21 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 96.327(7)
_cell_angle_gamma                90
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_cell_volume                     2646.4(4)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2008)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      223(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0520
_diffrn_reflns_av_unetI/netI     0.0368
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       14
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_diffrn_reflns_limit_k_min       -19
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_diffrn_reflns_limit_l_min       -16
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_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
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_diffrn_reflns_theta_max         24.999
_diffrn_reflns_theta_min         3.042
_exptl_absorpt_coefficient_mu    0.078
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_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.209
_exptl_crystal_description       block
_exptl_crystal_F_000             1028
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: cold hexanes'
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.17
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_refine_ls_matrix_type           full
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_refine_ls_number_reflns         4656
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_refine_ls_restrained_S_all      1.004
_refine_ls_R_factor_all          0.0788
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_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0086P)^2^+2.2590P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0875
_refine_ls_wR_factor_ref         0.0984
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_reflns_number_gt                3277
_reflns_number_total             4656
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c5cc06322a2.cif
_cod_data_source_block           3a
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7124585
_shelx_shelxl_version_number     2014/7
_exptl_absorpt_special_details   none
_shelx_res_checksum              51430
_shelx_hkl_checksum              51055