Cyclic (amino)(aryl)carbenes (CAArCs) enter the field of chromophore ligands - Expanded π system leads to unusually deep red emitting Cu<sup>I</sup> compounds.
Gernert, Markus; Balles-Wolf, Lukas; Kerner, Florian; M Uuml Ller, Ulrich; Schmiedel, Alexander; Holzapfel, Marco; Marian, Christel M.; Pflaum, Jens; Lambert, Christoph; Steffen, Andreas; Journal of the American Chemical Society  (2020) –; doi:10.1021/jacs.0c02234

data_4134858
_publ_section_title
;
 Cyclic (amino)(aryl)carbenes (CAArCs) enter the field of chromophore
 ligands - Expanded \p system leads to unusually deep red emitting
 Cu<sup>I</sup> compounds.
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_paper_doi               10.1021/jacs.0c02234
_journal_year                    2020
_chemical_formula_moiety         'C44 H39 Cu N2'
_chemical_formula_sum            'C44 H39 Cu N2'
_chemical_formula_weight         659.31
_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'
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_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 98.24(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   14.836(5)
_cell_length_b                   12.399(5)
_cell_length_c                   18.325(8)
_cell_measurement_reflns_used    9991
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.53
_cell_measurement_theta_min      2.25
_cell_volume                     3336(2)
_computing_cell_refinement       'Saint+ ver. V8.38A (Bruker AXS)'
_computing_data_collection       'APEX2 ver. 2014.9 (Bruker AXS)'
_computing_data_reduction        'Saint+ ver. V8.38A (Bruker AXS)'
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_computing_publication_material  'SHELXL-2014/7 (Sheldrick, 2014)'
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_computing_structure_solution    'SHELXT (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'CCD area detector (Apex2)'
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker X8-APEX II'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  'multi-layer mirror'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0624
_diffrn_reflns_av_unetI/netI     0.0493
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
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_diffrn_reflns_limit_k_min       -17
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_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            44356
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         30.034
_diffrn_reflns_theta_min         1.655
_diffrn_source                   'rotating-anode (Nonius FR-591)'
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_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.6833
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SadAbs 2016/2 (Bruker AXS)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.313
_exptl_crystal_description       block
_exptl_crystal_F_000             1384
_exptl_crystal_size_max          0.389
_exptl_crystal_size_mid          0.212
_exptl_crystal_size_min          0.19
_refine_diff_density_max         0.791
_refine_diff_density_min         -0.479
_refine_diff_density_rms         0.075
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     428
_refine_ls_number_reflns         9765
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0554
_refine_ls_R_factor_gt           0.0413
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0530P)^2^+1.7423P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1050
_refine_ls_wR_factor_ref         0.1131
_reflns_Friedel_coverage         0.000
_reflns_number_gt                7879
_reflns_number_total             9765
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja0c02234_si_003.cif
_cod_data_source_block           lbw035_a
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4134858
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.775
_shelx_estimated_absorpt_t_max   0.880
_shelx_res_checksum              84502
_shelx_hkl_checksum              79094