Selective C‒C bond cleavage of cyclopentadiene rings assisted by ferric chloride to synthesize water-soluble pyrylium salts
Ye, Junwei; Zhang, Xiangdong; Deng, Dai; Ning, Guiling; Liu, Tianqing; Zhuang, Meiling; Yang, Lijian; Gong, Weitao; Lin, Yuan; RSC Advances 3 (2013) 8232–; doi:10.1039/c3ra41274a

data_7239027
_publ_section_title
;
 Selective C--C bond cleavage of cyclopentadiene rings assisted by ferric
 chloride to synthesize water-soluble pyrylium salts
;
_journal_issue                   22
_journal_name_full               'RSC Advances'
_journal_page_first              8232
_journal_paper_doi               10.1039/c3ra41274a
_journal_volume                  3
_journal_year                    2013
_chemical_formula_sum            'C26 H23 Cl4 Fe O4'
_chemical_formula_weight         597.09
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 92.980(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.772(6)
_cell_length_b                   19.769(16)
_cell_length_c                   17.515(14)
_cell_measurement_reflns_used    6088
_cell_measurement_temperature    273(2)
_cell_measurement_theta_max      27.55
_cell_measurement_theta_min      2.06
_cell_volume                     2687(4)
_computing_cell_refinement       'SAINT (Bruker, 1997)'
_computing_data_collection       'SMART (Bruker, 1997)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Bruker, 1997)'
_diffrn_ambient_temperature      273(2)
_diffrn_detector_area_resol_mean 'Bruker SMART CCD area-detector'
_diffrn_measured_fraction_theta_full 0.980
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       '\f and \w 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  0.0380
_diffrn_reflns_av_sigmaI/netI    0.0594
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            15171
_diffrn_reflns_theta_full        27.55
_diffrn_reflns_theta_max         27.55
_diffrn_reflns_theta_min         2.06
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.989
_exptl_absorpt_correction_T_max  0.9916
_exptl_absorpt_correction_T_min  0.9840
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.476
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1220
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.33
_exptl_crystal_size_min          0.32
_refine_diff_density_max         0.434
_refine_diff_density_min         -0.279
_refine_diff_density_rms         0.057
_refine_ls_extinction_coef       0
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.999
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     319
_refine_ls_number_reflns         6088
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.999
_refine_ls_R_factor_all          0.0981
_refine_ls_R_factor_gt           0.0479
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0596P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1068
_refine_ls_wR_factor_ref         0.1264
_reflns_number_gt                3636
_reflns_number_total             6088
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ra41274a.txt
_cod_data_source_block           3d
_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.

data item '_exptl_crystal_density_meas' value 'not measured' was
changed to '?' -- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_cell_volume        2688(4)
_cod_original_sg_symbol_H-M      'P2(1)/c '
_cod_database_code               7239027