Borontribromide-mediated C–C bond formation in cyclic ketones: a transition metal free approach
Ahmad, Imran; Pathak, Vinay; Vasudev, Prema G.; Maurya, Hardesh K.; Gupta, Atul; RSC Advances 4 (2014) 24619–; doi:10.1039/c4ra01745e

data_7235565
_publ_section_title
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 Borontribromide-mediated C--C bond formation in cyclic ketones: a
 transition metal free approach
;
_journal_issue                   47
_journal_name_full               'RSC Advances'
_journal_page_first              24619
_journal_paper_doi               10.1039/c4ra01745e
_journal_volume                  4
_journal_year                    2014
_chemical_formula_moiety         'C20 H18 O'
_chemical_formula_sum            'C20 H18 O'
_chemical_formula_weight         274.34
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_cell_setting           triclinic
_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                109.057(7)
_cell_angle_beta                 102.134(7)
_cell_angle_gamma                92.430(7)
_cell_formula_units_Z            2
_cell_length_a                   7.952(3)
_cell_length_b                   9.721(4)
_cell_length_c                   9.932(4)
_cell_measurement_temperature    293(2)
_cell_volume                     704.3(5)
_computing_cell_refinement       'BRUKER SMART'
_computing_data_collection       'BRUKER SMART'
_computing_data_reduction        'BRUKER SAINT'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'BRUKER AXS SMART APEX CCD with Mo source'
_diffrn_measurement_method       'phi and omega 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  0.0191
_diffrn_reflns_av_sigmaI/netI    0.0398
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            3617
_diffrn_reflns_theta_full        24.71
_diffrn_reflns_theta_max         24.71
_diffrn_reflns_theta_min         2.23
_exptl_absorpt_coefficient_mu    0.078
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.294
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Rectangular
_exptl_crystal_F_000             292
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.382
_refine_diff_density_min         -0.317
_refine_diff_density_rms         0.076
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.075
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     238
_refine_ls_number_reflns         2382
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.075
_refine_ls_R_factor_all          0.0745
_refine_ls_R_factor_gt           0.0574
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1047P)^2^+0.2098P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1522
_refine_ls_wR_factor_ref         0.1763
_reflns_number_gt                1866
_reflns_number_total             2382
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ra01745e2.cif
_cod_data_source_block           mi113-6
_cod_depositor_comments
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The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Triclinic' was changed to
'triclinic' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/RSC/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7235565