Synthesis and Reactivity of the Osmium(III) Pentamethylcyclopentadienyl Complex (C5Me5)2Os2Br4. X-ray Crystal Structures of (C5Me5)2Os2Br4, (C5Me5)2Os2(μ-O)Br4, and (C5Me5)2Os2(μ-NPh)2Br2
Gross, Christopher L.; Brumaghim, Julia L.; Girolami, Gregory S.; Organometallics 26 (2007) 2258–; doi:10.1021/om060983u

data_4072735
_publ_section_title
;
 Synthesis and Reactivity of the Osmium(III) Pentamethylcyclopentadienyl
 Complex (C5Me5)2Os2Br4. X-ray Crystal Structures of (C5Me5)2Os2Br4,
 (C5Me5)2Os2(\m-O)Br4, and (C5Me5)2Os2(\m-NPh)2Br2
;
_journal_issue                   9
_journal_name_full               Organometallics
_journal_page_first              2258
_journal_paper_doi               10.1021/om060983u
_journal_volume                  26
_journal_year                    2007
_chemical_formula_sum            'C20 H30 Br4 Os2'
_chemical_formula_weight         970.48
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                90.00
_cell_angle_beta                 117.2080(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.6643(5)
_cell_length_b                   13.8792(7)
_cell_length_c                   9.9442(5)
_cell_measurement_temperature    299(2)
_cell_volume                     1186.26(10)
_computing_cell_refinement       'Bruker SMART'
_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      299(2)
_diffrn_measured_fraction_theta_full 0.963
_diffrn_measured_fraction_theta_max 0.963
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0940
_diffrn_reflns_av_sigmaI/netI    0.1001
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            7488
_diffrn_reflns_theta_full        28.20
_diffrn_reflns_theta_max         28.20
_diffrn_reflns_theta_min         2.37
_exptl_absorpt_coefficient_mu    17.441
_exptl_absorpt_correction_T_max  0.6170
_exptl_absorpt_correction_T_min  0.2980
_exptl_absorpt_correction_type   integration
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    2.717
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       columnar
_exptl_crystal_F_000             884
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.03
_refine_diff_density_max         1.536
_refine_diff_density_min         -3.507
_refine_diff_density_rms         0.295
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.963
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     123
_refine_ls_number_reflns         2817
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.963
_refine_ls_R_factor_all          0.0939
_refine_ls_R_factor_gt           0.0474
_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^)+(0.0460P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0945
_refine_ls_wR_factor_ref         0.1101
_reflns_number_gt                1805
_reflns_number_total             2817
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om060983usi20061024_064609.cif
_cod_data_source_block           h33aface
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not_measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4072735