Synergistic silver/scandium catalysis for divergent synthesis of skeletally diverse chromene derivatives
Jiang, Bo; Liu, Shuai; Chen, Ke; Lan, Xin-Chan; Hao, Wen-Juan; Li, Guigen; Tu, Shu-Jiang; Chem. Commun.  (2017) –; doi:10.1039/C7CC05563C

data_7120628
_publ_section_title
;
 Synergistic silver/scandium catalysis for divergent synthesis of
 skeletally diverse chromene derivatives
;
_journal_name_full               'Chem. Commun.'
_journal_paper_doi               10.1039/C7CC05563C
_journal_year                    2017
_chemical_formula_sum            'C29 H22 O2'
_chemical_formula_weight         402.46
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_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
;
2017-07-17 deposited with the CCDC.
2017-09-07 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 93.2630(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.2056(8)
_cell_length_b                   9.3800(7)
_cell_length_c                   22.1929(19)
_cell_measurement_reflns_used    2452
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      24.426
_cell_measurement_theta_min      2.358
_cell_volume                     2121.0(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'CCD area detector'
_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  0.0376
_diffrn_reflns_av_sigmaI/netI    0.0447
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            10392
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         2.36
_exptl_absorpt_coefficient_mu    0.078
_exptl_absorpt_correction_T_max  0.9771
_exptl_absorpt_correction_T_min  0.9696
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.260
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             848
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.34
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.140
_refine_diff_density_min         -0.174
_refine_diff_density_rms         0.035
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.010
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     280
_refine_ls_number_reflns         3732
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.010
_refine_ls_R_factor_all          0.0894
_refine_ls_R_factor_gt           0.0419
_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^)+(0.0441P)^2^+0.1697P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0897
_refine_ls_wR_factor_ref         0.1071
_reflns_number_gt                2210
_reflns_number_total             3732
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c7cc05563c2.cif
_cod_data_source_block           170603a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 

2018-03-15
Z value and formula fixed to values more according to usual
chemical conventions.                 miguel
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_original_formula_sum        'C58 H44 O4'
_cod_original_formula_units_Z    2
_cod_original_formula_weight     804.93
_cod_database_code               7120628