Iridium(I) Complexes with Hemilabile N-Heterocyclic Carbenes: Efficient and Versatile Transfer Hydrogenation Catalysts
Jiménez, M. Victoria; Fernández-Tornos, Javier; Pérez-Torrente, Jesús J.; Modrego, Francisco J.; Winterle, Sonja; Cunchillos, Carmen; Lahoz, Fernando J.; Oro, Luis A.; Organometallics 30 (2011) 5493–; doi:10.1021/om200747k

data_4065376
_publ_section_title
;
 Iridium(I) Complexes with Hemilabile N-Heterocyclic Carbenes: Efficient
 and Versatile Transfer Hydrogenation Catalysts
;
_journal_issue                   20
_journal_name_full               Organometallics
_journal_page_first              5493
_journal_paper_doi               10.1021/om200747k
_journal_volume                  30
_journal_year                    2011
_chemical_formula_moiety         'C20 H26 Br Ir N2 O'
_chemical_formula_sum            'C20 H26 Br Ir N2 O'
_chemical_formula_weight         582.54
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 119.226(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.346(2)
_cell_length_b                   10.8182(17)
_cell_length_c                   14.463(2)
_cell_measurement_reflns_used    5259
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.0135
_cell_measurement_theta_min      2.488
_cell_volume                     1958.9(5)
_computing_cell_refinement       'SAINT+ v. 6.45 (Bruker AXS, 2003)'
_computing_data_collection       'SMART v. 5.611 (Bruker AXS, 2000)'
_computing_data_reduction        'SAINT+ v. 6.45 (Bruker AXS, 2003)'
_computing_molecular_graphics    'XP program, SHELXTL v6.12, Bruker2000'
_computing_publication_material  'XCIF program, SHELXTLv6.12, BrukerAXS'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.26
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker SMART APEX CCD system'
_diffrn_measurement_method       '\w rotations with narrow frames'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0301
_diffrn_reflns_av_sigmaI/netI    0.0338
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            12159
_diffrn_reflns_theta_full        27.10
_diffrn_reflns_theta_max         27.10
_diffrn_reflns_theta_min         2.48
_diffrn_standards_decay_%        'no decay'
_exptl_absorpt_coefficient_mu    8.866
_exptl_absorpt_correction_T_max  0.265
_exptl_absorpt_correction_T_min  0.245
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
 SADABS: Area-Detector Absorption Correction. (1996)  Bruker-AXS 
 within SAINT+ package, v. 6.45.                    
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.975
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1120
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         1.730
_refine_diff_density_min         -0.686
_refine_diff_density_rms         0.136
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     228
_refine_ls_number_reflns         4289
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0312
_refine_ls_R_factor_gt           0.0269
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0306P)^2^+3.0919P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0634
_refine_ls_wR_factor_ref         0.0651
_reflns_number_gt                3856
_reflns_number_total             4289
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om200747k_si_002.cif
_cod_data_source_block           compound_7
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               4065376