Heavy alkali metal complexes of N-heterocyclic carbenes.
Groth, Lucie J.; Bockfeld, Dirk; Tamm, Matthias; Chemical communications (Cambridge, England) 61 (2025) 15806–15809; doi:10.1039/d5cc04534g

data_7134939
_publ_section_title
;
 Heavy alkali metal complexes of N-heterocyclic carbenes.
;
_journal_issue                   81
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              15806
_journal_page_last               15809
_journal_paper_doi               10.1039/d5cc04534g
_journal_volume                  61
_journal_year                    2025
_chemical_formula_moiety         'C53 H51 B F15 N2 O2 Rb, 0.5(C5 H12)'
_chemical_formula_sum            'C55.5 H57 B F15 N2 O2 Rb'
_chemical_formula_weight         1165.31
_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
_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2025-08-06 deposited with the CCDC.	2025-09-02 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 95.879(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.4449(3)
_cell_length_b                   21.3951(6)
_cell_length_c                   23.6633(10)
_cell_measurement_reflns_used    16090
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      71.5520
_cell_measurement_theta_min      2.7750
_cell_volume                     5260.2(3)
_computing_cell_refinement       'CrysAlisPro 1.171.43.112a (Rigaku OD, 2024)'
_computing_data_collection
'CrysAlisPro system (CCD 43.104a 64-bit (release 22-12-2023))'
_computing_data_reduction        'CrysAlisPro 1.171.43.112a (Rigaku OD, 2024)'
_computing_publication_material
'OLEX2 v1.3 (O. V. Dolomanov et al., J. Appl. Cryst., 2009, 42, 339-341)'
_computing_structure_refinement
'SHELXL-2018/3 (G. M. Sheldrick, Acta Cryst., 2015, C71, 3-8)'
_computing_structure_solution
'SHELXT 2018/2 (G. M. Sheldrick, Acta Cryst., 2015, A71, 3-8)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'Hybrid Pixel Array Detector'
_diffrn_detector_area_resol_mean 10.0000
_diffrn_detector_type            HyPix
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type
'XtaLAB Synergy, Single source at home/near, HyPix'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.1556
_diffrn_reflns_av_unetI/netI     0.0689
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            90293
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        66.602
_diffrn_reflns_theta_max         66.602
_diffrn_reflns_theta_min         2.791
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'PhotonJet (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    2.151
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.93102
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.43.112a (Rigaku Oxford Diffraction, 2024)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.471
_exptl_crystal_description       'fragment of needle'
_exptl_crystal_F_000             2388
_exptl_crystal_size_max          0.090
_exptl_crystal_size_mid          0.060
_exptl_crystal_size_min          0.020
_refine_diff_density_max         0.835
_refine_diff_density_min         -1.597
_refine_diff_density_rms         0.094
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.014
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     908
_refine_ls_number_reflns         9302
_refine_ls_number_restraints     641
_refine_ls_restrained_S_all      1.002
_refine_ls_R_factor_all          0.1150
_refine_ls_R_factor_gt           0.0831
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1333P)^2^+10.5172P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2228
_refine_ls_wR_factor_ref         0.2493
_reflns_Friedel_coverage         0.000
_reflns_number_gt                6290
_reflns_number_total             9302
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5cc04534g2.cif
_cod_data_source_block           lgr11db
_cod_depositor_comments
'Adding full bibliography for 7134934--7134942.cif.'
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_original_formula_sum        'C55.50 H57 B F15 N2 O2 Rb'
_cod_database_code               7134939
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.830
_shelx_estimated_absorpt_t_max   0.958
_oxdiff_exptl_absorpt_empirical_full_min 0.581
_oxdiff_exptl_absorpt_empirical_full_max 2.178
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
- Detector area scaling
- B-factor correction
;
_shelx_res_checksum              5779