Mechanism-based design of labile precursors for chromium(I) chemistry
Eser S. Akturk; Glenn P. A. Yap; Klaus H. Theopold; Chem.Commun. 51 (2015) 15402–; doi:10.1039/C5cc05993C

data_7117923
_publ_section_title
;
 Mechanism-based design of labile precursors for chromium(I) chemistry
;
_journal_name_full               Chem.Commun.
_journal_page_first              15402
_journal_paper_doi               10.1039/C5cc05993C
_journal_volume                  51
_journal_year                    2015
_chemical_formula_sum            'C50 H84 B2 Cr2 N12'
_chemical_formula_weight         978.90
_chemical_name_systematic
; 
 ? 
;
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   other
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2015-04-07 deposited with the CCDC.
2015-08-27 downloaded from the CCDC.
;
_cell_angle_alpha                86.554(4)
_cell_angle_beta                 87.189(4)
_cell_angle_gamma                77.250(4)
_cell_formula_units_Z            2
_cell_length_a                   11.792(3)
_cell_length_b                   13.394(3)
_cell_length_c                   18.815(4)
_cell_measurement_reflns_used    964
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      28.08
_cell_measurement_theta_min      2.75
_cell_volume                     2891.2(12)
_computing_cell_refinement       'SAINT (Bruker, 2002)'
_computing_data_collection       'SMART (Bruker, 2002)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2001)'
_computing_publication_material  'SHELXTL (Sheldrick, 2001)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      200(2)
_diffrn_detector_area_resol_mean 836.6
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker AXS APEX diffractometer'
_diffrn_measurement_method       \w
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0506
_diffrn_reflns_av_unetI/netI     0.0678
_diffrn_reflns_laue_measured_fraction_full 0.999
_diffrn_reflns_laue_measured_fraction_max 0.990
_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       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            33993
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.990
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.309
_diffrn_reflns_theta_min         1.855
_exptl_absorpt_coefficient_mu    0.418
_exptl_absorpt_correction_T_max  0.9851
_exptl_absorpt_correction_T_min  0.9381
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2003)'
_exptl_crystal_colour            Purple
_exptl_crystal_density_diffrn    1.124
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Needle
_exptl_crystal_F_000             1052
_exptl_crystal_size_max          0.155
_exptl_crystal_size_mid          0.038
_exptl_crystal_size_min          0.036
_refine_diff_density_max         1.341
_refine_diff_density_min         -0.525
_refine_diff_density_rms         0.064
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.005
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     637
_refine_ls_number_reflns         14254
_refine_ls_number_restraints     10
_refine_ls_restrained_S_all      1.005
_refine_ls_R_factor_all          0.0934
_refine_ls_R_factor_gt           0.0626
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0672P)^2^+2.3739P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1542
_refine_ls_wR_factor_ref         0.1761
_reflns_Friedel_coverage         0.000
_reflns_friedel_fraction_full    .
_reflns_friedel_fraction_max     .
_reflns_number_gt                9938
_reflns_number_total             14254
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c5cc05993c2.cif
_cod_data_source_block           kla0137
_cod_depositor_comments
;

2017-12-13
Z value and formula fixed to values more according to usual
chemical conventions.                 miguel
;
_cod_original_formula_sum            'C25 H42 B Cr N6'
_cod_original_formula_weight         489.45
_cod_original_formula_units_Z            4
_cod_original_cell_volume        2891.1(12)
_cod_database_code               7117923
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.938
_shelx_estimated_absorpt_t_max   0.985
_shelx_res_checksum              34834