Dihydrogen/Dihydride or Tetrahydride? An Experimental and Computational Investigation of Pincer Iridium Polyhydrides
Travis J. Hebden; Karen I. Goldberg; D. Michael Heinekey; Xiawei Zhang; Thomas J. Emge; Alan S. Goldman; Karsten Krogh-Jespersen; Inorganic Chemistry 49 (2010) 1733–1742; doi:10.1021/ic902163w

data_4314849
_publ_contact_author_address
;Universit\"at Konstanz 
Fachbereich Chemie
D-78457 Konstanz
;
_publ_contact_author_email       thomas.huhn@uni-konstanz.de
_publ_contact_author_fax         +49-7531-884424
_publ_contact_author_name        'Thomas Huhn'
_publ_section_title
;
 Dihydrogen/Dihydride or Tetrahydride? An Experimental and Computational
 Investigation of Pincer Iridium Polyhydrides
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              1733
_journal_page_last               1742
_journal_paper_doi               10.1021/ic902163w
_journal_volume                  49
_journal_year                    2010
_chemical_formula_sum            'C24 H47 Ir P2'
_chemical_formula_weight         589.76
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           77
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P 4c'
_symmetry_space_group_name_H-M   'P 42'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   11.5580(6)
_cell_length_b                   11.5580(6)
_cell_length_c                   9.5846(5)
_cell_measurement_reflns_used    5089
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      31.45
_cell_measurement_theta_min      2.49
_cell_volume                     1280.38(12)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART APEX CCD'
_diffrn_measurement_method       '\f and \w scans'
_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  0.0176
_diffrn_reflns_av_sigmaI/netI    0.0159
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            15188
_diffrn_reflns_theta_full        30.47
_diffrn_reflns_theta_max         30.47
_diffrn_reflns_theta_min         2.49
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    5.346
_exptl_absorpt_correction_T_max  0.531
_exptl_absorpt_correction_T_min  0.319
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SAINT (SADABS)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.530
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             596
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.639
_refine_diff_density_min         -0.237
_refine_diff_density_rms         0.058
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.006(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.001
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     138
_refine_ls_number_reflns         3898
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.001
_refine_ls_R_factor_all          0.0181
_refine_ls_R_factor_gt           0.0149
_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^)+(0.0180P)^2^+0.5200P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0338
_refine_ls_wR_factor_ref         0.0349
_reflns_number_gt                3467
_reflns_number_total             3898
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic902163w_si_002.cif
_cod_data_source_block           irh4p2b
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Tetragonal' changed to 'tetragonal'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_database_code               4314849