A Less Carbocentric View of Agostic Interactions: The Complexes [Rh(η4-cod){H2A(mt)2}] (A = B, C+; mt = Methimazolyl)
Crossley, Ian R.; Hill, Anthony F.; Humphrey, Elizabeth R.; Smith, Matthew K.; Organometallics 25 (2006) 2242–; doi:10.1021/om050942i

data_4074854
_publ_section_title
;
 A Less Carbocentric View of Agostic Interactions:&#x00A0; The Complexes
 [Rh(\h4-cod){H2A(mt)2}] (A = B, C+; mt = Methimazolyl)
;
_journal_issue                   9
_journal_name_full               Organometallics
_journal_page_first              2242
_journal_paper_doi               10.1021/om050942i
_journal_volume                  25
_journal_year                    2006
_chemical_formula_sum            'C55 H62 B2 Cl2 F8 N12 Rh2 S4'
_chemical_formula_weight         1452.02
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_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_method           SHELXL-97
_cell_angle_alpha                90.000
_cell_angle_beta                 106.448(5)
_cell_angle_gamma                90.000
_cell_formula_units_Z            4
_cell_length_a                   17.146(5)
_cell_length_b                   22.332(5)
_cell_length_c                   17.492(5)
_cell_measurement_reflns_used    51448
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     6424(3)
_computing_cell_refinement       DENZO-SMN
_computing_data_collection       'Nonius Collect'
_computing_data_reduction        'X -Seed'
_computing_molecular_graphics    'X-Seed / POV-Ray'
_computing_publication_material  'Microsoft Office 2000'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  CCD
_diffrn_measurement_method       ' \f and \w scans with CCD '
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0876
_diffrn_reflns_av_sigmaI/netI    0.0441
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            57231
_diffrn_reflns_theta_full        27.52
_diffrn_reflns_theta_max         27.52
_diffrn_reflns_theta_min         2.94
_diffrn_standards_decay_%        0.00
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.776
_exptl_absorpt_correction_T_max  0.890
_exptl_absorpt_correction_T_min  0.817
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details
;
Gaussian integration (Coppens, 1970)
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.501
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2950
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.944
_refine_diff_density_min         -0.452
_refine_diff_density_rms         0.087
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     410
_refine_ls_number_reflns         7379
_refine_ls_number_restraints     25
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.0682
_refine_ls_R_factor_gt           0.0461
_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^)+(0.0705P)^2^+10.0712P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1202
_refine_ls_wR_factor_ref         0.1336
_reflns_number_gt                5523
_reflns_number_total             7379
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om050942isi20051102_090428.cif
_cod_data_source_block           c:lh1m
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               4074854