A bis(amido) ligand set that supports two-coordinate chromium in the +1, +2, and +3 oxidation states
Irene C. Cai; Michael I. Lipschutz; T. Don Tilley; Chem.Commun. 50 (2014) 13062–; doi:10.1039/C4cc06615D

data_7115837
_publ_section_title
;
 A bis(amido) ligand set that supports two-coordinate chromium in the +1,
 +2, and +3 oxidation states
;
_journal_name_full               Chem.Commun.
_journal_page_first              13062
_journal_paper_doi               10.1039/C4cc06615D
_journal_volume                  50
_journal_year                    2014
_chemical_formula_sum            'C42 H76 Cr N2 Si2'
_chemical_formula_weight         717.23
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                98.9810(10)
_cell_angle_beta                 104.6850(10)
_cell_angle_gamma                118.9100(10)
_cell_formula_units_Z            1
_cell_length_a                   10.6605(3)
_cell_length_b                   10.8266(3)
_cell_length_c                   11.4767(3)
_cell_measurement_reflns_used    9883
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.66
_cell_measurement_theta_min      2.36
_cell_volume                     1059.18(5)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    ORTEP32
_computing_publication_material  WinGX
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    SIR97
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.366
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.854
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'microfocus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0420
_diffrn_reflns_av_sigmaI/netI    0.0548
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            24671
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         31.24
_diffrn_reflns_theta_min         1.94
_exptl_absorpt_coefficient_mu    0.356
_exptl_absorpt_correction_T_max  0.9790
_exptl_absorpt_correction_T_min  0.9687
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.124
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             394
_exptl_crystal_size_max          0.09
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.365
_refine_diff_density_min         -0.302
_refine_diff_density_rms         0.061
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.021
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     224
_refine_ls_number_reflns         5882
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.021
_refine_ls_R_factor_all          0.0675
_refine_ls_R_factor_gt           0.0405
_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^)+(0.0351P)^2^+0.4506P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0852
_refine_ls_wR_factor_ref         0.0950
_reflns_number_gt                4302
_reflns_number_total             5882
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4cc06615d2.cif
_cod_data_source_block           shelxl
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7115837