Chelated bis(NHC) complexes of saturated (imidazolin-2-ylidene) NHC ligands: structural authentication and facile ligand fragmentation.
Gardiner, Michael G.; McGuinness, David S.; Vanston, Catriona R.; Dalton transactions (Cambridge, England : 2003) 46 (2017) 3051–3058; doi:10.1039/c7dt00327g

data_7042020
_publ_section_title
;
 Chelated bis(NHC) complexes of saturated (imidazolin-2-ylidene) NHC
 ligands: structural authentication and facile ligand fragmentation.
;
_journal_issue                   9
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3051
_journal_page_last               3058
_journal_paper_doi               10.1039/c7dt00327g
_journal_volume                  46
_journal_year                    2017
_chemical_formula_moiety         'C24 H32 Br2 N4 Pd'
_chemical_formula_sum            'C24 H32 Br2 N4 Pd'
_chemical_formula_weight         642.76
_chemical_name_systematic
;
 ? 
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2016-03-23
_audit_creation_method
;
Olex2 1.2
(compiled 2016.02.19 svn.r3266 for OlexSys, GUI svn.r5155)
;
_audit_update_record
;
2016-07-15 deposited with the CCDC.
2017-02-10 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 102.10(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   28.283(6)
_cell_length_b                   14.081(1)
_cell_length_c                   12.991(1)
_cell_measurement_reflns_used    33894
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      30.09
_cell_measurement_theta_min      1.47
_cell_volume                     5058.8(12)
_computing_cell_refinement       XDS
_computing_data_collection       BLU-ICE
_computing_data_reduction        XDS
_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      173.15
_diffrn_detector_area_resol_mean 'ADSC Q210'
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type  '3-BM1 Australian Synchrotron'
_diffrn_measurement_method       Rotation
_diffrn_radiation_monochromator  Si<111>
_diffrn_radiation_type           Synchrotron
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0470
_diffrn_reflns_av_unetI/netI     0.0248
_diffrn_reflns_limit_h_max       39
_diffrn_reflns_limit_h_min       -39
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            50134
_diffrn_reflns_theta_full        30.09
_diffrn_reflns_theta_max         30.09
_diffrn_reflns_theta_min         1.47
_diffrn_source                   'Synchrotron BM'
_exptl_absorpt_coefficient_mu    3.912
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.688
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             2560
_exptl_crystal_size_max          0.02
_exptl_crystal_size_mid          0.02
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.721
_refine_diff_density_min         -1.960
_refine_diff_density_rms         0.140
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.098
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     286
_refine_ls_number_reflns         7322
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.098
_refine_ls_R_factor_all          0.0502
_refine_ls_R_factor_gt           0.0410
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0508P)^2^+21.7372P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1022
_refine_ls_wR_factor_ref         0.1071
_reflns_number_gt                6202
_reflns_number_total             7322
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c7dt00327g1.cif
_cod_data_source_block           50cv44
_cod_depositor_comments
'Adding full bibliography for 7042016--7042022.cif.'
_cod_original_cell_volume        5058.7(18)
_cod_database_code               7042020
_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:
 C2(H2A,H2B), C3(H3A,H3B), C14(H14A,H14B), C15(H15A,H15B)
2.b Aromatic/amide H refined with riding coordinates:
 C1(H1), C6(H6), C8(H8), C13(H13), C18(H18), C20(H20)
2.c Idealised Me refined as rotating group:
 C10(H10A,H10B,H10C), C11(H11A,H11B,H11C), C12(H12A,H12B,H12C), C22(H22A,H22B,
 H22C), C23(H23A,H23B,H23C), C24(H24A,H24B,H24C)
;
_olex2_submission_special_instructions 'No special instructions were received'