Experimental and theoretical study of the [3 + 2] cycloaddition of carbonyl ylides with alkynes.
Bentabed-Ababsa, Ghenia; Hamza-Reguig, Samira; Derdour, Aïcha; Domingo, Luis R.; Sáez, José A; Roisnel, Thierry; Dorcet, Vincent; Nassar, Ekhlass; Mongin, Florence; Organic & biomolecular chemistry 10 (2012) 8434–8444; doi:10.1039/c2ob26442k

data_7152703
_publ_section_title
;
 Experimental and theoretical study of the [3 + 2] cycloaddition of
 carbonyl ylides with alkynes.
;
_journal_issue                   42
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              8434
_journal_page_last               8444
_journal_paper_doi               10.1039/c2ob26442k
_journal_volume                  10
_journal_year                    2012
_chemical_absolute_configuration unk
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C18 H12 N2 O'
_chemical_formula_sum            'C18 H12 N2 O'
_chemical_formula_weight         272.3
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      4
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.4
_audit_creation_date             2010-03-30T09:18:39-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 93.710(2)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   7.7576(3)
_cell_length_b                   6.0070(2)
_cell_length_c                   14.7572(6)
_cell_measurement_reflns_used    5150
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.77
_cell_measurement_wavelength     0.71073
_cell_volume                     686.24(4)
_computing_cell_refinement       'Bruker SMART (Bruker, 2002)'
_computing_data_collection       'Bruker SAINT (Bruker, 2002)'
_computing_data_reduction        'Bruker SAINT (Bruker, 2002)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material
;
WinGX publication routines (Farrugia, 1999),
CRYSCAL (T. Roisnel, local program)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Altomare et al., 1999))'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'CCD plate'
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'APEXII, Bruker-AXS'
_diffrn_measurement_method       'CCD rotation images, thin slices'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.031
_diffrn_reflns_av_unetI/netI     0.0221
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            8178
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.66
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_T_max  0.998
_exptl_absorpt_correction_T_min  0.864
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
[Sheldrick, G.M. (2002). SADABS Bruker AXS Inc., Madison, Wisconsin, USA]
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.318
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blade
_exptl_crystal_F_000             284
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.227
_refine_diff_density_min         -0.166
_refine_diff_density_rms         0.033
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.089
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     190
_refine_ls_number_reflns         1721
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.089
_refine_ls_R_factor_all          0.0295
_refine_ls_R_factor_gt           0.0275
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0327P)^2^+0.1328P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.067
_refine_ls_wR_factor_ref         0.0687
_reflns_number_gt                1649
_reflns_number_total             1721
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ob26442k.txt
_cod_data_source_block           3a
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7152703