Chiral gels derived from secondary ammonium salts of (1R,3S)-(+)-camphoric acid.
Adalder, Tapas Kumar; Adarsh, N. N.; Sankolli, Ravish; Dastidar, Parthasarathi; Beilstein journal of organic chemistry 6 (2010) 848–858; doi:10.3762/bjoc.6.100

data_4029775
_publ_section_title
;
 Chiral gels derived from secondary ammonium salts of
 (1R,3S)-(+)-camphoric acid.
;
_journal_name_full               'Beilstein journal of organic chemistry'
_journal_page_first              848
_journal_page_last               858
_journal_paper_doi               10.3762/bjoc.6.100
_journal_volume                  6
_journal_year                    2010
_chemical_absolute_configuration syn
_chemical_formula_sum            'C24 H31 N O4'
_chemical_formula_weight         397.50
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_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_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 98.981(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.6454(3)
_cell_length_b                   17.9624(9)
_cell_length_c                   9.3062(4)
_cell_measurement_temperature    100(2)
_cell_volume                     1097.24(9)
_computing_cell_refinement       'Bruker Apex II and SAINT (Bruker, 2006)'
_computing_data_collection       'Bruker Apex II (Bruker, 2006)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'Mercury 2.3 (Macrae et al., 2008)'
_computing_publication_material  'Bruker Apex II'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 3
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker CCD area detector'
_diffrn_measurement_method       'omega scan'
_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  0.0397
_diffrn_reflns_av_sigmaI/netI    0.0646
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            11570
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.49
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  0.9903
_exptl_absorpt_correction_T_min  0.9808
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.203
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             428
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.156
_refine_diff_density_min         -0.149
_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   2.3(13)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.923
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     266
_refine_ls_number_reflns         4209
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.922
_refine_ls_R_factor_all          0.0845
_refine_ls_R_factor_gt           0.0462
_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^)+(0.0586P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1039
_refine_ls_wR_factor_ref         0.1153
_reflns_number_gt                2685
_reflns_number_total             4209
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1860-5397-6-100-S1.cif
_cod_data_source_block           ta0507h
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               4029775