Efficient trifluoromethylation via the cyclopropanation of allenes and subsequent C–C bond cleavage
Tang, Yang; Yu, Qiong; Ma, Shengming; Organic Chemistry Frontiers 4 (2017) 1762–; doi:10.1039/C7QO00419B

data_1553818
_publ_section_title
;
 Efficient trifluoromethylation via the cyclopropanation of allenes and
 subsequent C--C bond cleavage
;
_journal_issue                   9
_journal_name_full               'Organic Chemistry Frontiers'
_journal_page_first              1762
_journal_paper_doi               10.1039/C7QO00419B
_journal_volume                  4
_journal_year                    2017
_chemical_formula_sum            'C15 H10 I2 O4'
_chemical_formula_weight         508.03
_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
_audit_creation_method           SHELXL-97
_audit_update_record
;
2014-07-07 deposited with the CCDC.
2017-06-23 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 117.921(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.884(2)
_cell_length_b                   4.3831(6)
_cell_length_c                   27.390(3)
_cell_measurement_temperature    296(2)
_cell_volume                     1578.9(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_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  0.0824
_diffrn_reflns_av_sigmaI/netI    0.0478
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -36
_diffrn_reflns_number            19434
_diffrn_reflns_theta_full        28.68
_diffrn_reflns_theta_max         28.68
_diffrn_reflns_theta_min         1.55
_exptl_absorpt_coefficient_mu    3.995
_exptl_absorpt_correction_T_max  0.6457
_exptl_absorpt_correction_T_min  0.3613
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.137
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             952
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.12
_refine_diff_density_max         1.790
_refine_diff_density_min         -1.718
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_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     190
_refine_ls_number_reflns         3976
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.140
_refine_ls_R_factor_all          0.1052
_refine_ls_R_factor_gt           0.0835
_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^)+(0.0223P)^2^+27.0941P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1766
_refine_ls_wR_factor_ref         0.1859
_reflns_number_gt                2985
_reflns_number_total             3976
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c7qo00419b2.cif
_cod_data_source_block           z
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' 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_cell_volume        1578.9(3)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1553818