The development of highly active acyclic chiral hydrazides for asymmetric iminium ion organocatalysis.
Gould, Eoin; Lebl, Tomas; Slawin, Alexandra M. Z.; Reid, Mark; Davies, Tony; Smith, Andrew D.; Organic & biomolecular chemistry 11 (2013) 7877–7892; doi:10.1039/c3ob41719k

data_7153177
_publ_section_title
;
 The development of highly active acyclic chiral hydrazides for asymmetric
 iminium ion organocatalysis.
;
_journal_issue                   45
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              7877
_journal_page_last               7892
_journal_paper_doi               10.1039/c3ob41719k
_journal_volume                  11
_journal_year                    2013
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C24 H24 N2 O3'
_chemical_formula_sum            'C24 H24 N2 O3'
_chemical_formula_weight         388.47
_space_group_IT_number           5
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      5
_symmetry_space_group_name_Hall  'C 2y'
_symmetry_space_group_name_H-M   'C 1 2 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.0000
_cell_angle_beta                 111.93(3)
_cell_angle_gamma                90.0000
_cell_formula_units_Z            4
_cell_length_a                   19.58(2)
_cell_length_b                   5.868(5)
_cell_length_c                   19.289(17)
_cell_measurement_reflns_used    790
_cell_measurement_temperature    173
_cell_measurement_theta_max      68.25
_cell_measurement_theta_min      21.30
_cell_volume                     2056(3)
_computing_cell_refinement       'CrystalClear-SM Expert 2.0 r2'
_computing_data_collection       'CrystalClear-SM Expert 2.0 r2 (Rigaku, 2009)'
_computing_data_reduction        'CrystalClear-SM Expert 2.0 r2'
_computing_molecular_graphics    'CrystalStructure 4.0'
_computing_publication_material  'CrystalStructure 4.0 (Rigaku, 2010)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR2004 (Burla, et al., 2005)'
_diffrn_ambient_temperature      173
_diffrn_detector_area_resol_mean 29.257
_diffrn_measured_fraction_theta_full 0.659
_diffrn_measured_fraction_theta_max 0.799
_diffrn_measurement_device_type  'Rigaku Saturn70'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54187
_diffrn_reflns_av_R_equivalents  0.0931
_diffrn_reflns_Laue_measured_fraction_full 0.659
_diffrn_reflns_Laue_measured_fraction_max 0.799
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            8029
_diffrn_reflns_theta_full        83.500
_diffrn_reflns_theta_max         68.566
_diffrn_reflns_theta_min         2.469
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.669
_exptl_absorpt_correction_T_max  0.987
_exptl_absorpt_correction_T_min  0.766
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'REQAB (Rigaku, 1998)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.255
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             824.00
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.020
_exptl_crystal_size_min          0.020
_refine_diff_density_max         0.220
_refine_diff_density_min         -0.310
_refine_ls_abs_structure_details
'Parsons and Flack (2004), Acta Cryst. A60, s61'
_refine_ls_abs_structure_Flack   0.4(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    mixed
_refine_ls_number_parameters     266
_refine_ls_number_reflns         2707
_refine_ls_number_restraints     1
_refine_ls_R_factor_gt           0.0759
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.1156P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.2055
_reflns_number_gt                1943
_reflns_number_total             2707
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            c3ob41719k.txt
_cod_data_source_block           17
_cod_original_cell_volume        2055(4)
_cod_database_code               7153177