Pseudotetrahedral d0, d1, and d2 Metal-Oxo Cores within a Tris(alkoxide) Platform
Stanislav Groysman; Dino Villagrán; Daniel G. Nocera; Inorganic Chemistry 49 (2010) 10759–10761; doi:10.1021/ic101968s

data_4317256
_publ_section_title
;
 Pseudotetrahedral d0, d1, and d2 Metal-Oxo Cores within a Tris(alkoxide)
 Platform
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              10759
_journal_page_last               10761
_journal_paper_doi               10.1021/ic101968s
_journal_volume                  49
_journal_year                    2010
_chemical_formula_sum            'C36 H81 Cr O5 Si'
_chemical_formula_weight         674.10
_chemical_name_common            Cr(ditox)3(OSiMe3)
_chemical_name_systematic
; 

 ? 

;
_space_group_IT_number           45
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'I 2 -2c'
_symmetry_space_group_name_H-M   'I b a 2'
_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            8
_cell_length_a                   19.150(2)
_cell_length_b                   36.173(4)
_cell_length_c                   11.3317(12)
_cell_measurement_temperature    100(2)
_cell_volume                     7849.6(15)
_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-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II 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  0.0416
_diffrn_reflns_av_sigmaI/netI    0.0256
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       48
_diffrn_reflns_limit_k_min       -46
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            77879
_diffrn_reflns_theta_full        28.33
_diffrn_reflns_theta_max         28.33
_diffrn_reflns_theta_min         1.13
_exptl_absorpt_coefficient_mu    0.358
_exptl_absorpt_correction_T_max  0.9482
_exptl_absorpt_correction_T_min  0.9001
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.141
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             3000
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.416
_refine_diff_density_min         -0.229
_refine_diff_density_rms         0.043
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.006(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     425
_refine_ls_number_reflns         9781
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.0309
_refine_ls_R_factor_gt           0.0281
_refine_ls_shift/su_max          0.027
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0400P)^2^+2.9238P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0701
_refine_ls_wR_factor_ref         0.0722
_reflns_number_gt                9286
_reflns_number_total             9781
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic101968s_si_002_8.cif
_cod_data_source_block           8
_cod_original_cell_volume        7849.7(15)
_cod_database_code               4317256