Carboalumination of a chromium-chromium quintuple bond
Awal Noor; Germund Glatz; Robert Muller; Martin Kaupp; Serhiy Demeshko; Rhett Kempe; Nature Chemistry 1 (2009) 322–325; doi:10.1038/nchem.255

data_1551990
_publ_section_title
;
 Carboalumination of a chromium-chromium quintuple bond
;
_journal_name_full               'Nature Chemistry'
_journal_page_first              322
_journal_page_last               325
_journal_paper_doi               10.1038/nchem.255
_journal_volume                  1
_journal_year                    2009
_chemical_formula_sum            'C50 H58 Cr2 N4 O4'
_chemical_formula_weight         883.02
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 116.302(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.6130(10)
_cell_length_b                   14.6670(12)
_cell_length_c                   13.6720(12)
_cell_measurement_reflns_used    all
_cell_measurement_temperature    133(2)
_cell_volume                     2267.4(3)
_computing_cell_refinement       X-AREA-STOE
_computing_data_collection       X-AREA-STOE
_computing_data_reduction        X-AREA-STOE
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SIR-97
_diffrn_ambient_temperature      133(2)
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type  STOE-IPDSII
_diffrn_measurement_method       Omega-Scan
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0807
_diffrn_reflns_av_sigmaI/netI    0.0502
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            28836
_diffrn_reflns_theta_full        25.79
_diffrn_reflns_theta_max         25.79
_diffrn_reflns_theta_min         1.80
_exptl_absorpt_coefficient_mu    0.527
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.293
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             932
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.23
_refine_diff_density_max         0.787
_refine_diff_density_min         -0.329
_refine_diff_density_rms         0.071
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     273
_refine_ls_number_reflns         4289
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0797
_refine_ls_R_factor_gt           0.0528
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0786P)^2^+0.1133P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1230
_refine_ls_wR_factor_ref         0.1333
_reflns_number_gt                3181
_reflns_number_total             4289
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            nchem.255-s4.cif
_cod_data_source_block           k708m
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1551990
_cell_measurement_2theta_min     2.78
_cell_measurement_2theta_max     51.91