Low-Coordinate Chromium Siloxides: The "Box" [Cr(μ-Cl)(μ-OSitBu3)]4, Distorted Trigonal [(tBu3SiO)3Cr][Na(benzene)] and [(tBu3SiO)3Cr][Na(dibenzo-18-c-6)], and Trigonal (tBu3SiO)3Cr
Sydora, Orson L.; Wolczanski, Peter T.; Lobkovsky, Emil B.; Buda, Corneliu; Cundari, Thomas R.; Inorganic Chemistry 44 (2005) 2606–2618; doi:10.1021/ic0488334

data_4300963
_publ_section_title
;
 Low-Coordinate Chromium Siloxides: The "Box" [Cr(\m-Cl)(\m-OSitBu3)]4,
 Distorted Trigonal [(tBu3SiO)3Cr][Na(benzene)] and
 [(tBu3SiO)3Cr][Na(dibenzo-18-c-6)], and Trigonal (tBu3SiO)3Cr
;
_journal_coden_ASTM              INOCAJ
_journal_issue                   8
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              2606
_journal_page_last               2618
_journal_paper_doi               10.1021/ic0488334
_journal_volume                  44
_journal_year                    2005
_chemical_formula_sum            'C66.5 H115.5 Cr Na O9 Si3'
_chemical_formula_weight         1218.35
_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                 114.744(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   29.194(7)
_cell_length_b                   17.917(4)
_cell_length_c                   30.123(7)
_cell_measurement_temperature    173(2)
_cell_volume                     14310(6)
_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      173(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Bruker 1K CCD area detector'
_diffrn_measurement_method       '0.3 deg. 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  0.0371
_diffrn_reflns_av_sigmaI/netI    0.0581
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            29098
_diffrn_reflns_theta_full        20.82
_diffrn_reflns_theta_max         20.82
_diffrn_reflns_theta_min         1.36
_exptl_absorpt_coefficient_mu    0.266
_exptl_absorpt_correction_T_max  0.9488
_exptl_absorpt_correction_T_min  0.9011
_exptl_absorpt_correction_type   SADABS
_exptl_crystal_colour            'light blue'
_exptl_crystal_density_diffrn    1.131
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       irregular
_exptl_crystal_F_000             5308
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         1.300
_refine_diff_density_min         -0.472
_refine_diff_density_rms         0.064
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.933
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           fullcycle
_refine_ls_number_parameters     1661
_refine_ls_number_reflns         14829
_refine_ls_number_restraints     114
_refine_ls_restrained_S_all      0.974
_refine_ls_R_factor_all          0.1099
_refine_ls_R_factor_gt           0.0722
_refine_ls_shift/su_max          0.287
_refine_ls_shift/su_mean         0.044
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1426P)^2^+35.6182P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1950
_refine_ls_wR_factor_ref         0.2279
_reflns_number_gt                10015
_reflns_number_total             14829
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic0488334si20040823_045025.cif
_cod_data_source_block           test
_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_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_formula_sum        'C66.50 H115.50 Cr Na O9 Si3'
_cod_database_code               4300963