Exploring Chromium(III)-Alkyl Bond Homolysis with CpCr[(ArNCMe)2CH](R) Complexes
K. Cory MacLeod; Julia L. Conway; Brian O. Patrick; Kevin M. Smith; Journal of the American Chemical Society 132 (2010) 17325–17334; doi:10.1021/ja1083392

data_4103634
_publ_section_title
;
 Exploring Chromium(III)-Alkyl Bond Homolysis with CpCr[(ArNCMe)2CH](R)
 Complexes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              17325
_journal_page_last               17334
_journal_paper_doi               10.1021/ja1083392
_journal_volume                  132
_journal_year                    2010
_chemical_formula_sum            'C32 H45 Cr N2 Si'
_chemical_formula_weight         537.79
_chemical_name_systematic
;
 ?
;
_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                100.740(5)
_cell_angle_beta                 104.780(5)
_cell_angle_gamma                112.521(5)
_cell_formula_units_Z            2
_cell_length_a                   10.3499(10)
_cell_length_b                   11.3640(11)
_cell_length_c                   14.9073(15)
_cell_measurement_reflns_used    9917
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      28.17
_cell_measurement_theta_min      2.62
_cell_volume                     1484.7(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type  'Bruker X8 APEX II'
_diffrn_measurement_method       'area detector'
_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  0.0326
_diffrn_reflns_av_sigmaI/netI    0.0327
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            23695
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.49
_exptl_absorpt_coefficient_mu    0.448
_exptl_absorpt_correction_T_max  0.965
_exptl_absorpt_correction_T_min  0.778
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.203
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             578
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.446
_refine_diff_density_min         -0.529
_refine_diff_density_rms         0.063
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     336
_refine_ls_number_reflns         6741
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0507
_refine_ls_R_factor_gt           0.0393
_refine_ls_shift/su_max          0.017
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0643P)^2^+0.5373P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1058
_refine_ls_wR_factor_ref         0.1138
_reflns_number_gt                5583
_reflns_number_total             6741
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja1083392_si_002_07.cif
_cod_data_source_block           4c_Mes_CH2SiMe3
_cod_database_code               4103634