H2-Initiated Reversible Switching between Two-Dimensional Metallacycles and Three-Dimensional Cylinders.
Han, Ying-Feng; Zhang, Long; Weng, Lin-Hong; Jin, Guo-Xin; Journal of the American Chemical Society 136 (2014) 14608–; doi:10.1021/ja508543y

data_4122914
_publ_section_title
;
 H2-Initiated Reversible Switching between Two-Dimensional Metallacycles
 and Three-Dimensional Cylinders.
;
_journal_issue                   41
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              14608
_journal_paper_doi               10.1021/ja508543y
_journal_volume                  136
_journal_year                    2014
_chemical_formula_sum            'C58 H74 F12 Ir2 N8 O14 S8'
_chemical_formula_weight         1976.13
_chemical_name_systematic
; 
 ? 
;
_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'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
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_cell_angle_beta                 106.4830(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   14.1913(9)
_cell_length_b                   27.0778(18)
_cell_length_c                   20.2418(13)
_cell_measurement_reflns_used    9828
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.47
_cell_measurement_theta_min      2.19
_cell_volume                     7458.6(8)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0314
_diffrn_reflns_av_unetI/netI     0.0362
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       35
_diffrn_reflns_limit_k_min       -35
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            54209
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.488
_diffrn_reflns_theta_min         1.834
_exptl_absorpt_coefficient_mu    3.883
_exptl_absorpt_correction_T_max  0.746
_exptl_absorpt_correction_T_min  0.567
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            black
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_exptl_crystal_description       block
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_exptl_crystal_size_max          0.090
_exptl_crystal_size_mid          0.050
_exptl_crystal_size_min          0.040
_platon_squeeze_details          ' '
_refine_diff_density_max         1.495
_refine_diff_density_min         -1.035
_refine_diff_density_rms         0.114
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     985
_refine_ls_number_reflns         17011
_refine_ls_number_restraints     118
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0442
_refine_ls_R_factor_gt           0.0310
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
; 
 w=1/[\s^2^(Fo^2^)+(0.0440P)^2^+5.7072P] 
 where P=(Fo^2^+2Fc^2^)/3 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0776
_refine_ls_wR_factor_ref         0.0818
_reflns_Friedel_coverage         0.000
_reflns_number_gt                13816
_reflns_number_total             17011
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja508543y_si_001.cif
_cod_data_source_block           3(OTf)4
_cod_database_code               4122914
_shelx_estimated_absorpt_t_min   0.721
_shelx_estimated_absorpt_t_max   0.860
_shelxl_version_number           2013-2
_shelx_res_checksum              16749
_shelx_hkl_checksum              77324