Anion-π interactions in four-membered rings
Estarellas, Carolina; Rotger, M. Carmen; Capó, Magdalena; Quiñonero, David; Frontera, Antonio; Costa, Antoni; Deyà, Pere M.; Organic Letters 11 (2009) 1987–1990; doi:10.1021/ol900470r

data_1503873
_publ_section_title
;
 Anion-\p interactions in four-membered rings
;
_journal_coden_ASTM              ORLEF7
_journal_issue                   9
_journal_name_full               'Organic Letters'
_journal_page_first              1987
_journal_page_last               1990
_journal_paper_doi               10.1021/ol900470r
_journal_volume                  11
_journal_year                    2009
_chemical_formula_sum            'C11 H19 I N2 O3'
_chemical_formula_weight         354.18
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.3820(13)
_cell_length_b                   12.748(2)
_cell_length_c                   15.264(3)
_cell_measurement_reflns_used    433
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      21.22
_cell_measurement_theta_min      2.12
_cell_volume                     1436.4(4)
_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      150(2)
_diffrn_detector_area_resol_mean 100
_diffrn_measured_fraction_theta_full 1.000
_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  0.0319
_diffrn_reflns_av_sigmaI/netI    0.0371
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            9113
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.30
_diffrn_reflns_theta_min         2.08
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.229
_exptl_absorpt_correction_T_max  0.7758
_exptl_absorpt_correction_T_min  0.5357
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            'PALE YELLOW'
_exptl_crystal_density_diffrn    1.638
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       BLOCK
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.827
_refine_diff_density_min         -0.420
_refine_diff_density_rms         0.072
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.43(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.957
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     160
_refine_ls_number_reflns         3507
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.957
_refine_ls_R_factor_all          0.0255
_refine_ls_R_factor_gt           0.0232
_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^)+(0.0245P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0487
_refine_ls_wR_factor_ref         0.0497
_reflns_number_gt                3309
_reflns_number_total             3507
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol900470r_si_002.cif
_cod_data_source_block           mredo2m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

 Updated bibliographic information.

 Antanas Vaitkus,
 2019-09-21
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1503873