Metal-Controlled Cycloaddition of 2-Alkynyl-1,4-benzoquinones and Styrenyl Systems: Lewis Acid versus π Acid
Zhang, Li; Li, Zhiming; Fan, Renhua; Organic Letters 15 (2013) 2482–; doi:10.1021/ol400956h

data_1512063
_publ_section_title
;
 Metal-Controlled Cycloaddition of 2-Alkynyl-1,4-benzoquinones and
 Styrenyl Systems: Lewis Acid versus \p Acid
;
_journal_issue                   10
_journal_name_full               'Organic Letters'
_journal_page_first              2482
_journal_paper_doi               10.1021/ol400956h
_journal_volume                  15
_journal_year                    2013
_chemical_formula_sum            'C21 H20 O3'
_chemical_formula_weight         320.37
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 90.620(17)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.858(7)
_cell_length_b                   28.33(3)
_cell_length_c                   9.954(11)
_cell_measurement_reflns_used    1016
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      21.898
_cell_measurement_theta_min      2.876
_cell_volume                     1652(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_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      293(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_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  0.0877
_diffrn_reflns_av_sigmaI/netI    0.0832
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       33
_diffrn_reflns_limit_k_min       -33
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            6761
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         1.44
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.9915
_exptl_absorpt_correction_T_min  0.9865
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.288
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             680
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.259
_refine_diff_density_min         -0.244
_refine_diff_density_rms         0.061
_refine_ls_extinction_coef       0.032(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.948
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     220
_refine_ls_number_reflns         2882
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.948
_refine_ls_R_factor_all          0.0978
_refine_ls_R_factor_gt           0.0691
_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^)+(0.0989P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1637
_refine_ls_wR_factor_ref         0.1791
_reflns_number_gt                1776
_reflns_number_total             2882
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol400956h_si_002.cif
_cod_data_source_block           a20524c
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.3.1 from 2005-06-27.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               1512063