Oxadendralenes in asymmetric organocatalysis for the construction of tetrahydroisochromenes
Hammer, Niels; Leth, Lars A.; Stiller, Julian; Jensen, Magnus E.; Jørgensen, Karl Anker; Chem. Sci. 7 (2016) 3649–; doi:10.1039/C6SC00185H

data_1542524
_publ_section_title
;
 Oxadendralenes in asymmetric organocatalysis for the construction of
 tetrahydroisochromenes
;
_journal_issue                   6
_journal_name_full               'Chem. Sci.'
_journal_page_first              3649
_journal_paper_doi               10.1039/C6SC00185H
_journal_volume                  7
_journal_year                    2016
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C15 H13 Br O2'
_chemical_formula_sum            'C15 H13 Br O2'
_chemical_formula_weight         305.16
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_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
_audit_creation_date             2015-06-07
_audit_creation_method
;
Olex2 1.2
(compiled 2015.01.26 svn.r3150 for OlexSys, GUI svn.r4998)
;
_audit_update_record
;
2015-06-25 deposited with the CCDC.
2016-02-17 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.1506(18)
_cell_length_b                   7.564(2)
_cell_length_c                   28.362(8)
_cell_measurement_reflns_used    1597
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      18.12
_cell_measurement_theta_min      2.41
_cell_volume                     1319.5(6)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      100.15
_diffrn_detector                 'Bruker APEX2 area detector'
_diffrn_detector_area_resol_mean 8
_diffrn_detector_type            'CCD area detector'
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  'mirror optics'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           AgK\a
_diffrn_radiation_wavelength     0.56086
_diffrn_reflns_av_R_equivalents  0.0710
_diffrn_reflns_av_unetI/netI     0.0771
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -4
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            5932
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        18.180
_diffrn_reflns_theta_max         18.180
_diffrn_reflns_theta_min         2.199
_diffrn_source                   'microfocus sealed X-ray tube'
_diffrn_source_type              'Incoatec I\ms Ag'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.669
_exptl_absorpt_correction_T_max  0.7442
_exptl_absorpt_correction_T_min  0.3888
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2012/1 (Bruker,2012) was used for absorption correction.
wR2(int) was 0.1823 before and 0.0690 after correction.
The Ratio of minimum to maximum transmission is 0.5224.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            yellowish
_exptl_crystal_density_diffrn    1.536
_exptl_crystal_description       needle
_exptl_crystal_F_000             616
_refine_diff_density_max         0.381
_refine_diff_density_min         -0.312
_refine_diff_density_rms         0.069
_refine_ls_abs_structure_details
;
 Flack x determined using 552 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.01(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.003
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     164
_refine_ls_number_reflns         1902
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.003
_refine_ls_R_factor_all          0.0470
_refine_ls_R_factor_gt           0.0357
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details     'w=1/[\s^2^(Fo^2^)] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0693
_refine_ls_wR_factor_ref         0.0739
_reflns_Friedel_coverage         0.651
_reflns_Friedel_fraction_full    0.996
_reflns_Friedel_fraction_max     0.995
_reflns_number_gt                1624
_reflns_number_total             1902
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6sc00185h2.cif
_cod_data_source_block           lal106_0m
_cod_depositor_comments
'Adding full bibliography for 1542521--1542526.cif.'
_cod_database_code               1542524
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C6(H6), C18(H18)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C4(H4), C5(H5), C9(H9), C10(H10), C12(H12), C13(H13), C14(H14)
2.c Idealised Me refined as rotating group:
 C21(H21A,H21B,H21C)
;
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'